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annotate Lib/fileinput.py @ 86127:a3d09c19bb93

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merge with 3.3
author Georg Brandl <georg@python.org>
date Sun, 06 Oct 2013 19:24:00 +0200
parents 03747d64c042
children 70bd6f7e013b
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 OSError
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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 """Return an instance of the FileInput class, which can be iterated.
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94
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95 The parameters are passed to the constructor of the FileInput class.
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96 The returned instance, in addition to being an iterator,
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97 keeps global state for the functions of this module,.
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98 """
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99 global _state
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100 if _state and _state._file:
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101 raise RuntimeError("input() already active")
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102 _state = FileInput(files, inplace, backup, bufsize, mode, openhook)
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103 return _state
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104
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105 def close():
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106 """Close the sequence."""
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107 global _state
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108 state = _state
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109 _state = None
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110 if state:
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111 state.close()
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112
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113 def nextfile():
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114 """
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115 Close the current file so that the next iteration will read the first
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116 line from the next file (if any); lines not read from the file will
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117 not count towards the cumulative line count. The filename is not
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118 changed until after the first line of the next file has been read.
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119 Before the first line has been read, this function has no effect;
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120 it cannot be used to skip the first file. After the last line of the
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121 last file has been read, this function has no effect.
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122 """
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123 if not _state:
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124 raise RuntimeError("no active input()")
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125 return _state.nextfile()
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126
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127 def filename():
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128 """
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129 Return the name of the file currently being read.
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130 Before the first line has been read, returns None.
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131 """
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132 if not _state:
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133 raise RuntimeError("no active input()")
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134 return _state.filename()
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135
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136 def lineno():
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137 """
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138 Return the cumulative line number of the line that has just been read.
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139 Before the first line has been read, returns 0. After the last line
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140 of the last file has been read, returns the line number of that line.
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141 """
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142 if not _state:
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143 raise RuntimeError("no active input()")
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144 return _state.lineno()
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145
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146 def filelineno():
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147 """
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148 Return the line number in the current file. Before the first line
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149 has been read, returns 0. After the last line of the last file has
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150 been read, returns the line number of that line within the file.
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151 """
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152 if not _state:
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153 raise RuntimeError("no active input()")
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154 return _state.filelineno()
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155
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156 def fileno():
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157 """
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158 Return the file number of the current file. When no file is currently
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159 opened, returns -1.
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160 """
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161 if not _state:
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162 raise RuntimeError("no active input()")
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163 return _state.fileno()
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164
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165 def isfirstline():
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166 """
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167 Returns true the line just read is the first line of its file,
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168 otherwise returns false.
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169 """
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170 if not _state:
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171 raise RuntimeError("no active input()")
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172 return _state.isfirstline()
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173
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174 def isstdin():
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175 """
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176 Returns true if the last line was read from sys.stdin,
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177 otherwise returns false.
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178 """
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179 if not _state:
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180 raise RuntimeError("no active input()")
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181 return _state.isstdin()
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182
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183 class FileInput:
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184 """FileInput([files[, inplace[, backup[, bufsize, [, mode[, openhook]]]]]])
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185
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186 Class FileInput is the implementation of the module; its methods
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187 filename(), lineno(), fileline(), isfirstline(), isstdin(), fileno(),
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188 nextfile() and close() correspond to the functions of the same name
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189 in the module.
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190 In addition it has a readline() method which returns the next
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191 input line, and a __getitem__() method which implements the
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192 sequence behavior. The sequence must be accessed in strictly
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193 sequential order; random access and readline() cannot be mixed.
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194 """
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195
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196 def __init__(self, files=None, inplace=False, backup="", bufsize=0,
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197 mode="r", openhook=None):
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198 if isinstance(files, str):
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199 files = (files,)
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200 else:
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201 if files is None:
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202 files = sys.argv[1:]
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203 if not files:
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204 files = ('-',)
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205 else:
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206 files = tuple(files)
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207 self._files = files
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208 self._inplace = inplace
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209 self._backup = backup
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210 self._bufsize = bufsize or DEFAULT_BUFSIZE
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211 self._savestdout = None
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212 self._output = None
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213 self._filename = None
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214 self._lineno = 0
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215 self._filelineno = 0
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216 self._file = None
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217 self._isstdin = False
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218 self._backupfilename = None
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219 self._buffer = []
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220 self._bufindex = 0
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221 # restrict mode argument to reading modes
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222 if mode not in ('r', 'rU', 'U', 'rb'):
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223 raise ValueError("FileInput opening mode must be one of "
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224 "'r', 'rU', 'U' and 'rb'")
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225 self._mode = mode
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226 if openhook:
8e57b5d8f58f Closes #13258: Use callable() built-in in the standard library.
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227 if inplace:
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228 raise ValueError("FileInput cannot use an opening hook in inplace mode")
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229 if not callable(openhook):
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230 raise ValueError("FileInput openhook must be callable")
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231 self._openhook = openhook
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232
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233 def __del__(self):
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234 self.close()
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235
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236 def close(self):
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237 self.nextfile()
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238 self._files = ()
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239
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240 def __enter__(self):
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241 return self
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242
ab89d0f52a7f #1286: allow using fileinput.FileInput as context manager.
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243 def __exit__(self, type, value, traceback):
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244 self.close()
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245
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246 def __iter__(self):
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247 return self
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248
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249 def __next__(self):
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250 try:
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251 line = self._buffer[self._bufindex]
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252 except IndexError:
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253 pass
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254 else:
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255 self._bufindex += 1
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256 self._lineno += 1
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257 self._filelineno += 1
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258 return line
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259 line = self.readline()
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260 if not line:
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261 raise StopIteration
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262 return line
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263
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264 def __getitem__(self, i):
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265 if i != self._lineno:
43020
907a45df1295 Raise statement normalization in Lib/.
Collin Winter <collinw@gmail.com>
parents: 42622
diff changeset
266 raise RuntimeError("accessing lines out of order")
22595
204d46fc54f6 Implement iterator protocol.
Neil Schemenauer <nascheme@enme.ucalgary.ca>
parents: 20654
diff changeset
267 try:
41501
0c5019afc55b PEP 3114: rename .next() to .__next__() and add next() builtin.
Georg Brandl <georg@python.org>
parents: 40775
diff changeset
268 return self.__next__()
22595
204d46fc54f6 Implement iterator protocol.
Neil Schemenauer <nascheme@enme.ucalgary.ca>
parents: 20654
diff changeset
269 except StopIteration:
43020
907a45df1295 Raise statement normalization in Lib/.
Collin Winter <collinw@gmail.com>
parents: 42622
diff changeset
270 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
271
00b1b77c4177 A new standard module, as discussed on comp.lang.python, to simplify
Guido van Rossum <guido@python.org>
parents:
diff changeset
272 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
273 savestdout = self._savestdout
fb4b4d069cc7 Mass check-in after untabifying all files that need it.
Guido van Rossum <guido@python.org>
parents: 6620
diff changeset
274 self._savestdout = 0
fb4b4d069cc7 Mass check-in after untabifying all files that need it.
Guido van Rossum <guido@python.org>
parents: 6620
diff changeset
275 if savestdout:
fb4b4d069cc7 Mass check-in after untabifying all files that need it.
Guido van Rossum <guido@python.org>
parents: 6620
diff changeset
276 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
277
7755
fb4b4d069cc7 Mass check-in after untabifying all files that need it.
Guido van Rossum <guido@python.org>
parents: 6620
diff changeset
278 output = self._output
fb4b4d069cc7 Mass check-in after untabifying all files that need it.
Guido van Rossum <guido@python.org>
parents: 6620
diff changeset
279 self._output = 0
fb4b4d069cc7 Mass check-in after untabifying all files that need it.
Guido van Rossum <guido@python.org>
parents: 6620
diff changeset
280 if output:
fb4b4d069cc7 Mass check-in after untabifying all files that need it.
Guido van Rossum <guido@python.org>
parents: 6620
diff changeset
281 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
282
7755
fb4b4d069cc7 Mass check-in after untabifying all files that need it.
Guido van Rossum <guido@python.org>
parents: 6620
diff changeset
283 file = self._file
fb4b4d069cc7 Mass check-in after untabifying all files that need it.
Guido van Rossum <guido@python.org>
parents: 6620
diff changeset
284 self._file = 0
fb4b4d069cc7 Mass check-in after untabifying all files that need it.
Guido van Rossum <guido@python.org>
parents: 6620
diff changeset
285 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
286 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
287
7755
fb4b4d069cc7 Mass check-in after untabifying all files that need it.
Guido van Rossum <guido@python.org>
parents: 6620
diff changeset
288 backupfilename = self._backupfilename
fb4b4d069cc7 Mass check-in after untabifying all files that need it.
Guido van Rossum <guido@python.org>
parents: 6620
diff changeset
289 self._backupfilename = 0
fb4b4d069cc7 Mass check-in after untabifying all files that need it.
Guido van Rossum <guido@python.org>
parents: 6620
diff changeset
290 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
291 try: os.unlink(backupfilename)
24807
685cd52c4c43 tightening up a few except: clauses
Skip Montanaro <skip@pobox.com>
parents: 23697
diff changeset
292 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
293
22867
e2f2187c3d2c Partial introduction of bools where appropriate.
Guido van Rossum <guido@python.org>
parents: 22595
diff changeset
294 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
295 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
296 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
297
00b1b77c4177 A new standard module, as discussed on comp.lang.python, to simplify
Guido van Rossum <guido@python.org>
parents:
diff changeset
298 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
299 try:
4dbbf322a9df Speed it up by using readlines(sizehint). It's still slower than
Guido van Rossum <guido@python.org>
parents: 12340
diff changeset
300 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
301 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
302 pass
4dbbf322a9df Speed it up by using readlines(sizehint). It's still slower than
Guido van Rossum <guido@python.org>
parents: 12340
diff changeset
303 else:
4dbbf322a9df Speed it up by using readlines(sizehint). It's still slower than
Guido van Rossum <guido@python.org>
parents: 12340
diff changeset
304 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
305 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
306 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
307 return line
7755
fb4b4d069cc7 Mass check-in after untabifying all files that need it.
Guido van Rossum <guido@python.org>
parents: 6620
diff changeset
308 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
309 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
310 return ""
fb4b4d069cc7 Mass check-in after untabifying all files that need it.
Guido van Rossum <guido@python.org>
parents: 6620
diff changeset
311 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
312 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
313 self._filelineno = 0
fb4b4d069cc7 Mass check-in after untabifying all files that need it.
Guido van Rossum <guido@python.org>
parents: 6620
diff changeset
314 self._file = None
22867
e2f2187c3d2c Partial introduction of bools where appropriate.
Guido van Rossum <guido@python.org>
parents: 22595
diff changeset
315 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
316 self._backupfilename = 0
fb4b4d069cc7 Mass check-in after untabifying all files that need it.
Guido van Rossum <guido@python.org>
parents: 6620
diff changeset
317 if self._filename == '-':
fb4b4d069cc7 Mass check-in after untabifying all files that need it.
Guido van Rossum <guido@python.org>
parents: 6620
diff changeset
318 self._filename = '<stdin>'
fb4b4d069cc7 Mass check-in after untabifying all files that need it.
Guido van Rossum <guido@python.org>
parents: 6620
diff changeset
319 self._file = sys.stdin
22867
e2f2187c3d2c Partial introduction of bools where appropriate.
Guido van Rossum <guido@python.org>
parents: 22595
diff changeset
320 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
321 else:
fb4b4d069cc7 Mass check-in after untabifying all files that need it.
Guido van Rossum <guido@python.org>
parents: 6620
diff changeset
322 if self._inplace:
fb4b4d069cc7 Mass check-in after untabifying all files that need it.
Guido van Rossum <guido@python.org>
parents: 6620
diff changeset
323 self._backupfilename = (
42622
4d2aa4bfb2d6 Remove RISCOS support
Skip Montanaro <skip@pobox.com>
parents: 41824
diff changeset
324 self._filename + (self._backup or ".bak"))
80932
47f98a550d42 Issue #16706: get rid of os.error
Andrew Svetlov <andrew.svetlov@gmail.com>
parents: 73434
diff changeset
325 try:
47f98a550d42 Issue #16706: get rid of os.error
Andrew Svetlov <andrew.svetlov@gmail.com>
parents: 73434
diff changeset
326 os.unlink(self._backupfilename)
47f98a550d42 Issue #16706: get rid of os.error
Andrew Svetlov <andrew.svetlov@gmail.com>
parents: 73434
diff changeset
327 except OSError:
47f98a550d42 Issue #16706: get rid of os.error
Andrew Svetlov <andrew.svetlov@gmail.com>
parents: 73434
diff changeset
328 pass
81039
7d69d04522e3 Replace IOError with OSError (#16715)
Andrew Svetlov <andrew.svetlov@gmail.com>
parents: 80932
diff changeset
329 # The next few lines may raise OSError
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:
81039
7d69d04522e3 Replace IOError with OSError (#16715)
Andrew Svetlov <andrew.svetlov@gmail.com>
parents: 80932
diff changeset
351 # This may raise OSError
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
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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414 for line in input(args, inplace=inplace, backup=backup):
7755
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]
40775
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()