Mercurial > cpython-lru_cache-weakref

annotate Lib/fileinput.py @ 84007:dbfbdf2b5c19 3.3

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Fix #17967: For ftp urls CWD to target instead of hopping to each directory towards target. This fixes a bug where target is accessible, but parent directories are restricted.
author Senthil Kumaran <senthil@uthcode.com>
date Sat, 01 Jun 2013 08:27:06 -0700
parents c2b3e8b437a4
children 0760b58526ba 47f98a550d42
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 """Helper class to quickly write a loop over all standard input files.
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2
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3 Typical use is:
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4
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5 import fileinput
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6 for line in fileinput.input():
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7 process(line)
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8
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9 This iterates over the lines of all files listed in sys.argv[1:],
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10 defaulting to sys.stdin if the list is empty. If a filename is '-' it
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11 is also replaced by sys.stdin. To specify an alternative list of
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12 filenames, pass it as the argument to input(). A single file name is
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13 also allowed.
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14
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15 Functions filename(), lineno() return the filename and cumulative line
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16 number of the line that has just been read; filelineno() returns its
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17 line number in the current file; isfirstline() returns true iff the
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18 line just read is the first line of its file; isstdin() returns true
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19 iff the line was read from sys.stdin. Function nextfile() closes the
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20 current file so that the next iteration will read the first line from
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21 the next file (if any); lines not read from the file will not count
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22 towards the cumulative line count; the filename is not changed until
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23 after the first line of the next file has been read. Function close()
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24 closes the sequence.
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25
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26 Before any lines have been read, filename() returns None and both line
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27 numbers are zero; nextfile() has no effect. After all lines have been
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28 read, filename() and the line number functions return the values
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29 pertaining to the last line read; nextfile() has no effect.
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30
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31 All files are opened in text mode by default, you can override this by
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32 setting the mode parameter to input() or FileInput.__init__().
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33 If an I/O error occurs during opening or reading a file, the IOError
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34 exception is raised.
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35
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36 If sys.stdin is used more than once, the second and further use will
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37 return no lines, except perhaps for interactive use, or if it has been
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38 explicitly reset (e.g. using sys.stdin.seek(0)).
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39
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40 Empty files are opened and immediately closed; the only time their
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41 presence in the list of filenames is noticeable at all is when the
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42 last file opened is empty.
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43
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44 It is possible that the last line of a file doesn't end in a newline
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45 character; otherwise lines are returned including the trailing
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46 newline.
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47
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48 Class FileInput is the implementation; its methods filename(),
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49 lineno(), fileline(), isfirstline(), isstdin(), nextfile() and close()
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50 correspond to the functions in the module. In addition it has a
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51 readline() method which returns the next input line, and a
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52 __getitem__() method which implements the sequence behavior. The
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53 sequence must be accessed in strictly sequential order; sequence
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54 access and readline() cannot be mixed.
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55
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56 Optional in-place filtering: if the keyword argument inplace=1 is
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57 passed to input() or to the FileInput constructor, the file is moved
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58 to a backup file and standard output is directed to the input file.
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59 This makes it possible to write a filter that rewrites its input file
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60 in place. If the keyword argument backup=".<some extension>" is also
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61 given, it specifies the extension for the backup file, and the backup
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62 file remains around; by default, the extension is ".bak" and it is
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63 deleted when the output file is closed. In-place filtering is
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64 disabled when standard input is read. XXX The current implementation
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65 does not work for MS-DOS 8+3 filesystems.
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66
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67 Performance: this module is unfortunately one of the slower ways of
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68 processing large numbers of input lines. Nevertheless, a significant
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69 speed-up has been obtained by using readlines(bufsize) instead of
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70 readline(). A new keyword argument, bufsize=N, is present on the
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71 input() function and the FileInput() class to override the default
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72 buffer size.
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73
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74 XXX Possible additions:
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75
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76 - optional getopt argument processing
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77 - isatty()
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78 - read(), read(size), even readlines()
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79
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80 """
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81
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82 import sys, os
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83
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84 __all__ = ["input", "close", "nextfile", "filename", "lineno", "filelineno",
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85 "isfirstline", "isstdin", "FileInput"]
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86
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87 _state = None
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88
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89 DEFAULT_BUFSIZE = 8*1024
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90
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91 def input(files=None, inplace=False, backup="", bufsize=0,
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92 mode="r", openhook=None):
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93 """input(files=None, inplace=False, backup="", bufsize=0, \
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94 mode="r", openhook=None)
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95
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96 Create an instance of the FileInput class. The instance will be used
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97 as global state for the functions of this module, and is also returned
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98 to use during iteration. The parameters to this function will be passed
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99 along to the constructor of the FileInput class.
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100 """
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101 global _state
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102 if _state and _state._file:
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103 raise RuntimeError("input() already active")
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104 _state = FileInput(files, inplace, backup, bufsize, mode, openhook)
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105 return _state
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106
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107 def close():
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108 """Close the sequence."""
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109 global _state
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110 state = _state
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111 _state = None
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112 if state:
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113 state.close()
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114
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115 def nextfile():
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116 """
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117 Close the current file so that the next iteration will read the first
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118 line from the next file (if any); lines not read from the file will
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119 not count towards the cumulative line count. The filename is not
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120 changed until after the first line of the next file has been read.
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121 Before the first line has been read, this function has no effect;
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122 it cannot be used to skip the first file. After the last line of the
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123 last file has been read, this function has no effect.
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124 """
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125 if not _state:
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126 raise RuntimeError("no active input()")
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127 return _state.nextfile()
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128
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129 def filename():
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130 """
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131 Return the name of the file currently being read.
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132 Before the first line has been read, returns None.
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133 """
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134 if not _state:
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135 raise RuntimeError("no active input()")
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136 return _state.filename()
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137
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138 def lineno():
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139 """
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140 Return the cumulative line number of the line that has just been read.
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141 Before the first line has been read, returns 0. After the last line
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142 of the last file has been read, returns the line number of that line.
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143 """
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144 if not _state:
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145 raise RuntimeError("no active input()")
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146 return _state.lineno()
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147
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148 def filelineno():
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149 """
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150 Return the line number in the current file. Before the first line
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151 has been read, returns 0. After the last line of the last file has
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152 been read, returns the line number of that line within the file.
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153 """
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154 if not _state:
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155 raise RuntimeError("no active input()")
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156 return _state.filelineno()
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157
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158 def fileno():
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159 """
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160 Return the file number of the current file. When no file is currently
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161 opened, returns -1.
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162 """
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163 if not _state:
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164 raise RuntimeError("no active input()")
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165 return _state.fileno()
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166
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167 def isfirstline():
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168 """
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169 Returns true the line just read is the first line of its file,
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170 otherwise returns false.
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171 """
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172 if not _state:
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173 raise RuntimeError("no active input()")
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174 return _state.isfirstline()
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175
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176 def isstdin():
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177 """
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178 Returns true if the last line was read from sys.stdin,
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179 otherwise returns false.
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180 """
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181 if not _state:
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182 raise RuntimeError("no active input()")
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183 return _state.isstdin()
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184
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185 class FileInput:
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186 """class FileInput([files[, inplace[, backup[, mode[, openhook]]]]])
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187
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188 Class FileInput is the implementation of the module; its methods
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189 filename(), lineno(), fileline(), isfirstline(), isstdin(), fileno(),
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190 nextfile() and close() correspond to the functions of the same name
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191 in the module.
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192 In addition it has a readline() method which returns the next
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193 input line, and a __getitem__() method which implements the
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194 sequence behavior. The sequence must be accessed in strictly
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195 sequential order; random access and readline() cannot be mixed.
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196 """
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197
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198 def __init__(self, files=None, inplace=False, backup="", bufsize=0,
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199 mode="r", openhook=None):
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200 if isinstance(files, str):
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201 files = (files,)
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202 else:
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203 if files is None:
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204 files = sys.argv[1:]
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205 if not files:
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206 files = ('-',)
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207 else:
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208 files = tuple(files)
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209 self._files = files
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210 self._inplace = inplace
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211 self._backup = backup
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212 self._bufsize = bufsize or DEFAULT_BUFSIZE
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213 self._savestdout = None
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214 self._output = None
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215 self._filename = None
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216 self._lineno = 0
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217 self._filelineno = 0
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218 self._file = None
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219 self._isstdin = False
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220 self._backupfilename = None
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221 self._buffer = []
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222 self._bufindex = 0
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223 # restrict mode argument to reading modes
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224 if mode not in ('r', 'rU', 'U', 'rb'):
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225 raise ValueError("FileInput opening mode must be one of "
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226 "'r', 'rU', 'U' and 'rb'")
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227 self._mode = mode
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228 if openhook:
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229 if inplace:
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230 raise ValueError("FileInput cannot use an opening hook in inplace mode")
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231 if not callable(openhook):
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232 raise ValueError("FileInput openhook must be callable")
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233 self._openhook = openhook
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234
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235 def __del__(self):
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236 self.close()
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237
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238 def close(self):
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239 self.nextfile()
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240 self._files = ()
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241
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242 def __enter__(self):
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243 return self
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244
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245 def __exit__(self, type, value, traceback):
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246 self.close()
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247
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248 def __iter__(self):
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249 return self
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250
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251 def __next__(self):
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252 try:
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253 line = self._buffer[self._bufindex]
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254 except IndexError:
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255 pass
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256 else:
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257 self._bufindex += 1
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258 self._lineno += 1
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259 self._filelineno += 1
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260 return line
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261 line = self.readline()
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262 if not line:
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263 raise StopIteration
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264 return line
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265
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parents: 20654
diff changeset
266 def __getitem__(self, i):
7755
fb4b4d069cc7 Mass check-in after untabifying all files that need it.
Guido van Rossum <guido@python.org>
parents: 6620
diff changeset
267 if i != self._lineno:
43020
907a45df1295 Raise statement normalization in Lib/.
Collin Winter <collinw@gmail.com>
parents: 42622
diff changeset
268 raise RuntimeError("accessing lines out of order")
22595
204d46fc54f6 Implement iterator protocol.
Neil Schemenauer <nascheme@enme.ucalgary.ca>
parents: 20654
diff changeset
269 try:
41501
0c5019afc55b PEP 3114: rename .next() to .__next__() and add next() builtin.
Georg Brandl <georg@python.org>
parents: 40775
diff changeset
270 return self.__next__()
22595
204d46fc54f6 Implement iterator protocol.
Neil Schemenauer <nascheme@enme.ucalgary.ca>
parents: 20654
diff changeset
271 except StopIteration:
43020
907a45df1295 Raise statement normalization in Lib/.
Collin Winter <collinw@gmail.com>
parents: 42622
diff changeset
272 raise IndexError("end of input reached")
6620
00b1b77c4177 A new standard module, as discussed on comp.lang.python, to simplify
Guido van Rossum <guido@python.org>
parents:
diff changeset
273
00b1b77c4177 A new standard module, as discussed on comp.lang.python, to simplify
Guido van Rossum <guido@python.org>
parents:
diff changeset
274 def nextfile(self):
7755
fb4b4d069cc7 Mass check-in after untabifying all files that need it.
Guido van Rossum <guido@python.org>
parents: 6620
diff changeset
275 savestdout = self._savestdout
fb4b4d069cc7 Mass check-in after untabifying all files that need it.
Guido van Rossum <guido@python.org>
parents: 6620
diff changeset
276 self._savestdout = 0
fb4b4d069cc7 Mass check-in after untabifying all files that need it.
Guido van Rossum <guido@python.org>
parents: 6620
diff changeset
277 if savestdout:
fb4b4d069cc7 Mass check-in after untabifying all files that need it.
Guido van Rossum <guido@python.org>
parents: 6620
diff changeset
278 sys.stdout = savestdout
6620
00b1b77c4177 A new standard module, as discussed on comp.lang.python, to simplify
Guido van Rossum <guido@python.org>
parents:
diff changeset
279
7755
fb4b4d069cc7 Mass check-in after untabifying all files that need it.
Guido van Rossum <guido@python.org>
parents: 6620
diff changeset
280 output = self._output
fb4b4d069cc7 Mass check-in after untabifying all files that need it.
Guido van Rossum <guido@python.org>
parents: 6620
diff changeset
281 self._output = 0
fb4b4d069cc7 Mass check-in after untabifying all files that need it.
Guido van Rossum <guido@python.org>
parents: 6620
diff changeset
282 if output:
fb4b4d069cc7 Mass check-in after untabifying all files that need it.
Guido van Rossum <guido@python.org>
parents: 6620
diff changeset
283 output.close()
6620
00b1b77c4177 A new standard module, as discussed on comp.lang.python, to simplify
Guido van Rossum <guido@python.org>
parents:
diff changeset
284
7755
fb4b4d069cc7 Mass check-in after untabifying all files that need it.
Guido van Rossum <guido@python.org>
parents: 6620
diff changeset
285 file = self._file
fb4b4d069cc7 Mass check-in after untabifying all files that need it.
Guido van Rossum <guido@python.org>
parents: 6620
diff changeset
286 self._file = 0
fb4b4d069cc7 Mass check-in after untabifying all files that need it.
Guido van Rossum <guido@python.org>
parents: 6620
diff changeset
287 if file and not self._isstdin:
fb4b4d069cc7 Mass check-in after untabifying all files that need it.
Guido van Rossum <guido@python.org>
parents: 6620
diff changeset
288 file.close()
6620
00b1b77c4177 A new standard module, as discussed on comp.lang.python, to simplify
Guido van Rossum <guido@python.org>
parents:
diff changeset
289
7755
fb4b4d069cc7 Mass check-in after untabifying all files that need it.
Guido van Rossum <guido@python.org>
parents: 6620
diff changeset
290 backupfilename = self._backupfilename
fb4b4d069cc7 Mass check-in after untabifying all files that need it.
Guido van Rossum <guido@python.org>
parents: 6620
diff changeset
291 self._backupfilename = 0
fb4b4d069cc7 Mass check-in after untabifying all files that need it.
Guido van Rossum <guido@python.org>
parents: 6620
diff changeset
292 if backupfilename and not self._backup:
fb4b4d069cc7 Mass check-in after untabifying all files that need it.
Guido van Rossum <guido@python.org>
parents: 6620
diff changeset
293 try: os.unlink(backupfilename)
24807
685cd52c4c43 tightening up a few except: clauses
Skip Montanaro <skip@pobox.com>
parents: 23697
diff changeset
294 except OSError: pass
6620
00b1b77c4177 A new standard module, as discussed on comp.lang.python, to simplify
Guido van Rossum <guido@python.org>
parents:
diff changeset
295
22867
e2f2187c3d2c Partial introduction of bools where appropriate.
Guido van Rossum <guido@python.org>
parents: 22595
diff changeset
296 self._isstdin = False
15746
4dbbf322a9df Speed it up by using readlines(sizehint). It's still slower than
Guido van Rossum <guido@python.org>
parents: 12340
diff changeset
297 self._buffer = []
4dbbf322a9df Speed it up by using readlines(sizehint). It's still slower than
Guido van Rossum <guido@python.org>
parents: 12340
diff changeset
298 self._bufindex = 0
6620
00b1b77c4177 A new standard module, as discussed on comp.lang.python, to simplify
Guido van Rossum <guido@python.org>
parents:
diff changeset
299
00b1b77c4177 A new standard module, as discussed on comp.lang.python, to simplify
Guido van Rossum <guido@python.org>
parents:
diff changeset
300 def readline(self):
15746
4dbbf322a9df Speed it up by using readlines(sizehint). It's still slower than
Guido van Rossum <guido@python.org>
parents: 12340
diff changeset
301 try:
4dbbf322a9df Speed it up by using readlines(sizehint). It's still slower than
Guido van Rossum <guido@python.org>
parents: 12340
diff changeset
302 line = self._buffer[self._bufindex]
4dbbf322a9df Speed it up by using readlines(sizehint). It's still slower than
Guido van Rossum <guido@python.org>
parents: 12340
diff changeset
303 except IndexError:
4dbbf322a9df Speed it up by using readlines(sizehint). It's still slower than
Guido van Rossum <guido@python.org>
parents: 12340
diff changeset
304 pass
4dbbf322a9df Speed it up by using readlines(sizehint). It's still slower than
Guido van Rossum <guido@python.org>
parents: 12340
diff changeset
305 else:
4dbbf322a9df Speed it up by using readlines(sizehint). It's still slower than
Guido van Rossum <guido@python.org>
parents: 12340
diff changeset
306 self._bufindex += 1
4dbbf322a9df Speed it up by using readlines(sizehint). It's still slower than
Guido van Rossum <guido@python.org>
parents: 12340
diff changeset
307 self._lineno += 1
4dbbf322a9df Speed it up by using readlines(sizehint). It's still slower than
Guido van Rossum <guido@python.org>
parents: 12340
diff changeset
308 self._filelineno += 1
4dbbf322a9df Speed it up by using readlines(sizehint). It's still slower than
Guido van Rossum <guido@python.org>
parents: 12340
diff changeset
309 return line
7755
fb4b4d069cc7 Mass check-in after untabifying all files that need it.
Guido van Rossum <guido@python.org>
parents: 6620
diff changeset
310 if not self._file:
fb4b4d069cc7 Mass check-in after untabifying all files that need it.
Guido van Rossum <guido@python.org>
parents: 6620
diff changeset
311 if not self._files:
fb4b4d069cc7 Mass check-in after untabifying all files that need it.
Guido van Rossum <guido@python.org>
parents: 6620
diff changeset
312 return ""
fb4b4d069cc7 Mass check-in after untabifying all files that need it.
Guido van Rossum <guido@python.org>
parents: 6620
diff changeset
313 self._filename = self._files[0]
fb4b4d069cc7 Mass check-in after untabifying all files that need it.
Guido van Rossum <guido@python.org>
parents: 6620
diff changeset
314 self._files = self._files[1:]
fb4b4d069cc7 Mass check-in after untabifying all files that need it.
Guido van Rossum <guido@python.org>
parents: 6620
diff changeset
315 self._filelineno = 0
fb4b4d069cc7 Mass check-in after untabifying all files that need it.
Guido van Rossum <guido@python.org>
parents: 6620
diff changeset
316 self._file = None
22867
e2f2187c3d2c Partial introduction of bools where appropriate.
Guido van Rossum <guido@python.org>
parents: 22595
diff changeset
317 self._isstdin = False
7755
fb4b4d069cc7 Mass check-in after untabifying all files that need it.
Guido van Rossum <guido@python.org>
parents: 6620
diff changeset
318 self._backupfilename = 0
fb4b4d069cc7 Mass check-in after untabifying all files that need it.
Guido van Rossum <guido@python.org>
parents: 6620
diff changeset
319 if self._filename == '-':
fb4b4d069cc7 Mass check-in after untabifying all files that need it.
Guido van Rossum <guido@python.org>
parents: 6620
diff changeset
320 self._filename = '<stdin>'
fb4b4d069cc7 Mass check-in after untabifying all files that need it.
Guido van Rossum <guido@python.org>
parents: 6620
diff changeset
321 self._file = sys.stdin
22867
e2f2187c3d2c Partial introduction of bools where appropriate.
Guido van Rossum <guido@python.org>
parents: 22595
diff changeset
322 self._isstdin = True
7755
fb4b4d069cc7 Mass check-in after untabifying all files that need it.
Guido van Rossum <guido@python.org>
parents: 6620
diff changeset
323 else:
fb4b4d069cc7 Mass check-in after untabifying all files that need it.
Guido van Rossum <guido@python.org>
parents: 6620
diff changeset
324 if self._inplace:
fb4b4d069cc7 Mass check-in after untabifying all files that need it.
Guido van Rossum <guido@python.org>
parents: 6620
diff changeset
325 self._backupfilename = (
42622
4d2aa4bfb2d6 Remove RISCOS support
Skip Montanaro <skip@pobox.com>
parents: 41824
diff changeset
326 self._filename + (self._backup or ".bak"))
7755
fb4b4d069cc7 Mass check-in after untabifying all files that need it.
Guido van Rossum <guido@python.org>
parents: 6620
diff changeset
327 try: os.unlink(self._backupfilename)
fb4b4d069cc7 Mass check-in after untabifying all files that need it.
Guido van Rossum <guido@python.org>
parents: 6620
diff changeset
328 except os.error: pass
11387
019cd21c8c9f Fix for PR#111: when using the inplace option, give the new file the
Guido van Rossum <guido@python.org>
parents: 8687
diff changeset
329 # The next few lines may raise IOError
7755
fb4b4d069cc7 Mass check-in after untabifying all files that need it.
Guido van Rossum <guido@python.org>
parents: 6620
diff changeset
330 os.rename(self._filename, self._backupfilename)
36595
c6fba456227b Patch #1212287: fileinput.input() now has a mode parameter for
Georg Brandl <georg@python.org>
parents: 36594
diff changeset
331 self._file = open(self._backupfilename, self._mode)
11387
019cd21c8c9f Fix for PR#111: when using the inplace option, give the new file the
Guido van Rossum <guido@python.org>
parents: 8687
diff changeset
332 try:
23697
c0e8c07ae1d6 Replace obsolete stat module constants with
Walter Dörwald <walter@livinglogic.de>
parents: 23521
diff changeset
333 perm = os.fstat(self._file.fileno()).st_mode
24807
685cd52c4c43 tightening up a few except: clauses
Skip Montanaro <skip@pobox.com>
parents: 23697
diff changeset
334 except OSError:
11387
019cd21c8c9f Fix for PR#111: when using the inplace option, give the new file the
Guido van Rossum <guido@python.org>
parents: 8687
diff changeset
335 self._output = open(self._filename, "w")
019cd21c8c9f Fix for PR#111: when using the inplace option, give the new file the
Guido van Rossum <guido@python.org>
parents: 8687
diff changeset
336 else:
43707
d8f7442b8cae Patch 1341 by Amaury Forgeot d'Arc.
Guido van Rossum <guido@python.org>
parents: 43577
diff changeset
337 mode = os.O_CREAT | os.O_WRONLY | os.O_TRUNC
d8f7442b8cae Patch 1341 by Amaury Forgeot d'Arc.
Guido van Rossum <guido@python.org>
parents: 43577
diff changeset
338 if hasattr(os, 'O_BINARY'):
d8f7442b8cae Patch 1341 by Amaury Forgeot d'Arc.
Guido van Rossum <guido@python.org>
parents: 43577
diff changeset
339 mode |= os.O_BINARY
d8f7442b8cae Patch 1341 by Amaury Forgeot d'Arc.
Guido van Rossum <guido@python.org>
parents: 43577
diff changeset
340
d8f7442b8cae Patch 1341 by Amaury Forgeot d'Arc.
Guido van Rossum <guido@python.org>
parents: 43577
diff changeset
341 fd = os.open(self._filename, mode, perm)
11387
019cd21c8c9f Fix for PR#111: when using the inplace option, give the new file the
Guido van Rossum <guido@python.org>
parents: 8687
diff changeset
342 self._output = os.fdopen(fd, "w")
019cd21c8c9f Fix for PR#111: when using the inplace option, give the new file the
Guido van Rossum <guido@python.org>
parents: 8687
diff changeset
343 try:
27166
0cadc29180e6 Test that chmod() actually exists before calling it (it doesn't on MacOS9).
Jack Jansen <jack.jansen@cwi.nl>
parents: 24807
diff changeset
344 if hasattr(os, 'chmod'):
0cadc29180e6 Test that chmod() actually exists before calling it (it doesn't on MacOS9).
Jack Jansen <jack.jansen@cwi.nl>
parents: 24807
diff changeset
345 os.chmod(self._filename, perm)
24807
685cd52c4c43 tightening up a few except: clauses
Skip Montanaro <skip@pobox.com>
parents: 23697
diff changeset
346 except OSError:
11387
019cd21c8c9f Fix for PR#111: when using the inplace option, give the new file the
Guido van Rossum <guido@python.org>
parents: 8687
diff changeset
347 pass
7755
fb4b4d069cc7 Mass check-in after untabifying all files that need it.
Guido van Rossum <guido@python.org>
parents: 6620
diff changeset
348 self._savestdout = sys.stdout
fb4b4d069cc7 Mass check-in after untabifying all files that need it.
Guido van Rossum <guido@python.org>
parents: 6620
diff changeset
349 sys.stdout = self._output
fb4b4d069cc7 Mass check-in after untabifying all files that need it.
Guido van Rossum <guido@python.org>
parents: 6620
diff changeset
350 else:
fb4b4d069cc7 Mass check-in after untabifying all files that need it.
Guido van Rossum <guido@python.org>
parents: 6620
diff changeset
351 # This may raise IOError
36596
e57377f0a167 Patch #1215184: FileInput now can be given an opening hook which can
Georg Brandl <georg@python.org>
parents: 36595
diff changeset
352 if self._openhook:
e57377f0a167 Patch #1215184: FileInput now can be given an opening hook which can
Georg Brandl <georg@python.org>
parents: 36595
diff changeset
353 self._file = self._openhook(self._filename, self._mode)
e57377f0a167 Patch #1215184: FileInput now can be given an opening hook which can
Georg Brandl <georg@python.org>
parents: 36595
diff changeset
354 else:
e57377f0a167 Patch #1215184: FileInput now can be given an opening hook which can
Georg Brandl <georg@python.org>
parents: 36595
diff changeset
355 self._file = open(self._filename, self._mode)
15746
4dbbf322a9df Speed it up by using readlines(sizehint). It's still slower than
Guido van Rossum <guido@python.org>
parents: 12340
diff changeset
356 self._buffer = self._file.readlines(self._bufsize)
4dbbf322a9df Speed it up by using readlines(sizehint). It's still slower than
Guido van Rossum <guido@python.org>
parents: 12340
diff changeset
357 self._bufindex = 0
4dbbf322a9df Speed it up by using readlines(sizehint). It's still slower than
Guido van Rossum <guido@python.org>
parents: 12340
diff changeset
358 if not self._buffer:
4dbbf322a9df Speed it up by using readlines(sizehint). It's still slower than
Guido van Rossum <guido@python.org>
parents: 12340
diff changeset
359 self.nextfile()
7755
fb4b4d069cc7 Mass check-in after untabifying all files that need it.
Guido van Rossum <guido@python.org>
parents: 6620
diff changeset
360 # Recursive call
fb4b4d069cc7 Mass check-in after untabifying all files that need it.
Guido van Rossum <guido@python.org>
parents: 6620
diff changeset
361 return self.readline()
6620
00b1b77c4177 A new standard module, as discussed on comp.lang.python, to simplify
Guido van Rossum <guido@python.org>
parents:
diff changeset
362
00b1b77c4177 A new standard module, as discussed on comp.lang.python, to simplify
Guido van Rossum <guido@python.org>
parents:
diff changeset
363 def filename(self):
7755
fb4b4d069cc7 Mass check-in after untabifying all files that need it.
Guido van Rossum <guido@python.org>
parents: 6620
diff changeset
364 return self._filename
6620
00b1b77c4177 A new standard module, as discussed on comp.lang.python, to simplify
Guido van Rossum <guido@python.org>
parents:
diff changeset
365
00b1b77c4177 A new standard module, as discussed on comp.lang.python, to simplify
Guido van Rossum <guido@python.org>
parents:
diff changeset
366 def lineno(self):
7755
fb4b4d069cc7 Mass check-in after untabifying all files that need it.
Guido van Rossum <guido@python.org>
parents: 6620
diff changeset
367 return self._lineno
6620
00b1b77c4177 A new standard module, as discussed on comp.lang.python, to simplify
Guido van Rossum <guido@python.org>
parents:
diff changeset
368
00b1b77c4177 A new standard module, as discussed on comp.lang.python, to simplify
Guido van Rossum <guido@python.org>
parents:
diff changeset
369 def filelineno(self):
7755
fb4b4d069cc7 Mass check-in after untabifying all files that need it.
Guido van Rossum <guido@python.org>
parents: 6620
diff changeset
370 return self._filelineno
6620
00b1b77c4177 A new standard module, as discussed on comp.lang.python, to simplify
Guido van Rossum <guido@python.org>
parents:
diff changeset
371
36594
781654be55ef Patch #1215184: fileinput now has a fileno() function for getting the
Georg Brandl <georg@python.org>
parents: 36590
diff changeset
372 def fileno(self):
781654be55ef Patch #1215184: fileinput now has a fileno() function for getting the
Georg Brandl <georg@python.org>
parents: 36590
diff changeset
373 if self._file:
781654be55ef Patch #1215184: fileinput now has a fileno() function for getting the
Georg Brandl <georg@python.org>
parents: 36590
diff changeset
374 try:
781654be55ef Patch #1215184: fileinput now has a fileno() function for getting the
Georg Brandl <georg@python.org>
parents: 36590
diff changeset
375 return self._file.fileno()
781654be55ef Patch #1215184: fileinput now has a fileno() function for getting the
Georg Brandl <georg@python.org>
parents: 36590
diff changeset
376 except ValueError:
781654be55ef Patch #1215184: fileinput now has a fileno() function for getting the
Georg Brandl <georg@python.org>
parents: 36590
diff changeset
377 return -1
781654be55ef Patch #1215184: fileinput now has a fileno() function for getting the
Georg Brandl <georg@python.org>
parents: 36590
diff changeset
378 else:
781654be55ef Patch #1215184: fileinput now has a fileno() function for getting the
Georg Brandl <georg@python.org>
parents: 36590
diff changeset
379 return -1
781654be55ef Patch #1215184: fileinput now has a fileno() function for getting the
Georg Brandl <georg@python.org>
parents: 36590
diff changeset
380
6620
00b1b77c4177 A new standard module, as discussed on comp.lang.python, to simplify
Guido van Rossum <guido@python.org>
parents:
diff changeset
381 def isfirstline(self):
7755
fb4b4d069cc7 Mass check-in after untabifying all files that need it.
Guido van Rossum <guido@python.org>
parents: 6620
diff changeset
382 return self._filelineno == 1
6620
00b1b77c4177 A new standard module, as discussed on comp.lang.python, to simplify
Guido van Rossum <guido@python.org>
parents:
diff changeset
383
00b1b77c4177 A new standard module, as discussed on comp.lang.python, to simplify
Guido van Rossum <guido@python.org>
parents:
diff changeset
384 def isstdin(self):
7755
fb4b4d069cc7 Mass check-in after untabifying all files that need it.
Guido van Rossum <guido@python.org>
parents: 6620
diff changeset
385 return self._isstdin
6620
00b1b77c4177 A new standard module, as discussed on comp.lang.python, to simplify
Guido van Rossum <guido@python.org>
parents:
diff changeset
386
36596
e57377f0a167 Patch #1215184: FileInput now can be given an opening hook which can
Georg Brandl <georg@python.org>
parents: 36595
diff changeset
387
e57377f0a167 Patch #1215184: FileInput now can be given an opening hook which can
Georg Brandl <georg@python.org>
parents: 36595
diff changeset
388 def hook_compressed(filename, mode):
e57377f0a167 Patch #1215184: FileInput now can be given an opening hook which can
Georg Brandl <georg@python.org>
parents: 36595
diff changeset
389 ext = os.path.splitext(filename)[1]
e57377f0a167 Patch #1215184: FileInput now can be given an opening hook which can
Georg Brandl <georg@python.org>
parents: 36595
diff changeset
390 if ext == '.gz':
e57377f0a167 Patch #1215184: FileInput now can be given an opening hook which can
Georg Brandl <georg@python.org>
parents: 36595
diff changeset
391 import gzip
e57377f0a167 Patch #1215184: FileInput now can be given an opening hook which can
Georg Brandl <georg@python.org>
parents: 36595
diff changeset
392 return gzip.open(filename, mode)
e57377f0a167 Patch #1215184: FileInput now can be given an opening hook which can
Georg Brandl <georg@python.org>
parents: 36595
diff changeset
393 elif ext == '.bz2':
e57377f0a167 Patch #1215184: FileInput now can be given an opening hook which can
Georg Brandl <georg@python.org>
parents: 36595
diff changeset
394 import bz2
e57377f0a167 Patch #1215184: FileInput now can be given an opening hook which can
Georg Brandl <georg@python.org>
parents: 36595
diff changeset
395 return bz2.BZ2File(filename, mode)
e57377f0a167 Patch #1215184: FileInput now can be given an opening hook which can
Georg Brandl <georg@python.org>
parents: 36595
diff changeset
396 else:
e57377f0a167 Patch #1215184: FileInput now can be given an opening hook which can
Georg Brandl <georg@python.org>
parents: 36595
diff changeset
397 return open(filename, mode)
e57377f0a167 Patch #1215184: FileInput now can be given an opening hook which can
Georg Brandl <georg@python.org>
parents: 36595
diff changeset
398
e57377f0a167 Patch #1215184: FileInput now can be given an opening hook which can
Georg Brandl <georg@python.org>
parents: 36595
diff changeset
399
e57377f0a167 Patch #1215184: FileInput now can be given an opening hook which can
Georg Brandl <georg@python.org>
parents: 36595
diff changeset
400 def hook_encoded(encoding):
e57377f0a167 Patch #1215184: FileInput now can be given an opening hook which can
Georg Brandl <georg@python.org>
parents: 36595
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401 def openhook(filename, mode):
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c2b3e8b437a4 fileinput: replace this last occurence of codecs.open with builtins.open.
Florent Xicluna <florent.xicluna@gmail.com>
parents: 73165
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402 return open(filename, mode, encoding=encoding)
36596
e57377f0a167 Patch #1215184: FileInput now can be given an opening hook which can
Georg Brandl <georg@python.org>
parents: 36595
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403 return openhook
e57377f0a167 Patch #1215184: FileInput now can be given an opening hook which can
Georg Brandl <georg@python.org>
parents: 36595
diff changeset
404
e57377f0a167 Patch #1215184: FileInput now can be given an opening hook which can
Georg Brandl <georg@python.org>
parents: 36595
diff changeset
405
6620
00b1b77c4177 A new standard module, as discussed on comp.lang.python, to simplify
Guido van Rossum <guido@python.org>
parents:
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406 def _test():
00b1b77c4177 A new standard module, as discussed on comp.lang.python, to simplify
Guido van Rossum <guido@python.org>
parents:
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407 import getopt
54169
904a1bd35e00 Use PEP 8 and true booleans.
Georg Brandl <georg@python.org>
parents: 43707
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408 inplace = False
904a1bd35e00 Use PEP 8 and true booleans.
Georg Brandl <georg@python.org>
parents: 43707
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409 backup = False
6620
00b1b77c4177 A new standard module, as discussed on comp.lang.python, to simplify
Guido van Rossum <guido@python.org>
parents:
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410 opts, args = getopt.getopt(sys.argv[1:], "ib:")
00b1b77c4177 A new standard module, as discussed on comp.lang.python, to simplify
Guido van Rossum <guido@python.org>
parents:
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411 for o, a in opts:
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904a1bd35e00 Use PEP 8 and true booleans.
Georg Brandl <georg@python.org>
parents: 43707
diff changeset
412 if o == '-i': inplace = True
7755
fb4b4d069cc7 Mass check-in after untabifying all files that need it.
Guido van Rossum <guido@python.org>
parents: 6620
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413 if o == '-b': backup = a
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00b1b77c4177 A new standard module, as discussed on comp.lang.python, to simplify
Guido van Rossum <guido@python.org>
parents:
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414 for line in input(args, inplace=inplace, backup=backup):
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fb4b4d069cc7 Mass check-in after untabifying all files that need it.
Guido van Rossum <guido@python.org>
parents: 6620
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415 if line[-1:] == '\n': line = line[:-1]
fb4b4d069cc7 Mass check-in after untabifying all files that need it.
Guido van Rossum <guido@python.org>
parents: 6620
diff changeset
416 if line[-1:] == '\r': line = line[:-1]
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4cdf21a0dbbc Fix most trivially-findable print statements.
Guido van Rossum <guido@python.org>
parents: 36608
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417 print("%d: %s[%d]%s %s" % (lineno(), filename(), filelineno(),
4cdf21a0dbbc Fix most trivially-findable print statements.
Guido van Rossum <guido@python.org>
parents: 36608
diff changeset
418 isfirstline() and "*" or "", line))
4cdf21a0dbbc Fix most trivially-findable print statements.
Guido van Rossum <guido@python.org>
parents: 36608
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419 print("%d: %s[%d]" % (lineno(), filename(), filelineno()))
6620
00b1b77c4177 A new standard module, as discussed on comp.lang.python, to simplify
Guido van Rossum <guido@python.org>
parents:
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420
00b1b77c4177 A new standard module, as discussed on comp.lang.python, to simplify
Guido van Rossum <guido@python.org>
parents:
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421 if __name__ == '__main__':
00b1b77c4177 A new standard module, as discussed on comp.lang.python, to simplify
Guido van Rossum <guido@python.org>
parents:
diff changeset
422 _test()