Mercurial > cpython-lru_cache-weakref

annotate Tools/scripts/checkappend.py @ 45888:51e24512e305

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- Issue #719888: Updated tokenize to use a bytes API. generate_tokens has been renamed tokenize and now works with bytes rather than strings. A new detect_encoding function has been added for determining source file encoding according to PEP-0263. Token sequences returned by tokenize always start with an ENCODING token which specifies the encoding used to decode the file. This token is used to encode the output of untokenize back to bytes. Credit goes to Michael "I'm-going-to-name-my-first-child-unittest" Foord from Resolver Systems for this work.
author Trent Nelson <trent.nelson@snakebite.org>
date Tue, 18 Mar 2008 22:41:35 +0000
parents 46625e6122e9
children fcfe324663a6
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1 #! /usr/bin/env python
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2
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3 # Released to the public domain, by Tim Peters, 28 February 2000.
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4
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5 """checkappend.py -- search for multi-argument .append() calls.
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6
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7 Usage: specify one or more file or directory paths:
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8 checkappend [-v] file_or_dir [file_or_dir] ...
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9
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10 Each file_or_dir is checked for multi-argument .append() calls. When
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11 a directory, all .py files in the directory, and recursively in its
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12 subdirectories, are checked.
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13
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14 Use -v for status msgs. Use -vv for more status msgs.
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15
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16 In the absence of -v, the only output is pairs of the form
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17
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18 filename(linenumber):
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19 line containing the suspicious append
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20
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21 Note that this finds multi-argument append calls regardless of whether
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22 they're attached to list objects. If a module defines a class with an
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23 append method that takes more than one argument, calls to that method
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24 will be listed.
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25
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26 Note that this will not find multi-argument list.append calls made via a
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27 bound method object. For example, this is not caught:
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28
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29 somelist = []
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30 push = somelist.append
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31 push(1, 2, 3)
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32 """
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33
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34 __version__ = 1, 0, 0
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35
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36 import os
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37 import sys
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38 import getopt
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39 import tokenize
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40
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41 verbose = 0
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42
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43 def errprint(*args):
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44 msg = ' '.join(args)
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45 sys.stderr.write(msg)
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46 sys.stderr.write("\n")
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47
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48 def main():
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49 args = sys.argv[1:]
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50 global verbose
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51 try:
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52 opts, args = getopt.getopt(sys.argv[1:], "v")
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53 except getopt.error as msg:
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54 errprint(str(msg) + "\n\n" + __doc__)
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55 return
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56 for opt, optarg in opts:
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57 if opt == '-v':
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58 verbose = verbose + 1
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59 if not args:
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60 errprint(__doc__)
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61 return
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62 for arg in args:
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63 check(arg)
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64
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65 def check(file):
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66 if os.path.isdir(file) and not os.path.islink(file):
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67 if verbose:
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68 print("%r: listing directory" % (file,))
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69 names = os.listdir(file)
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70 for name in names:
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71 fullname = os.path.join(file, name)
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72 if ((os.path.isdir(fullname) and
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73 not os.path.islink(fullname))
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74 or os.path.normcase(name[-3:]) == ".py"):
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75 check(fullname)
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76 return
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77
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78 try:
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79 f = open(file)
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80 except IOError as msg:
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81 errprint("%r: I/O Error: %s" % (file, msg))
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82 return
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83
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84 if verbose > 1:
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85 print("checking %r ..." % (file,))
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86
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87 ok = AppendChecker(file, f).run()
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88 if verbose and ok:
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89 print("%r: Clean bill of health." % (file,))
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90
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91 [FIND_DOT,
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92 FIND_APPEND,
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93 FIND_LPAREN,
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94 FIND_COMMA,
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95 FIND_STMT] = range(5)
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96
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97 class AppendChecker:
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98 def __init__(self, fname, file):
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99 self.fname = fname
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100 self.file = file
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101 self.state = FIND_DOT
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102 self.nerrors = 0
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103
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104 def run(self):
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105 try:
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106 tokens = tokenize.generate_tokens(self.file.readline)
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107 for _token in tokens:
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108 self.tokeneater(*_token)
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109 except tokenize.TokenError as msg:
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110 errprint("%r: Token Error: %s" % (self.fname, msg))
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111 self.nerrors = self.nerrors + 1
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112 return self.nerrors == 0
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113
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114 def tokeneater(self, type, token, start, end, line,
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115 NEWLINE=tokenize.NEWLINE,
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116 JUNK=(tokenize.COMMENT, tokenize.NL),
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117 OP=tokenize.OP,
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118 NAME=tokenize.NAME):
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119
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120 state = self.state
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121
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122 if type in JUNK:
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123 pass
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124
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125 elif state is FIND_DOT:
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126 if type is OP and token == ".":
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127 state = FIND_APPEND
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128
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129 elif state is FIND_APPEND:
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130 if type is NAME and token == "append":
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131 self.line = line
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132 self.lineno = start[0]
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133 state = FIND_LPAREN
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134 else:
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135 state = FIND_DOT
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136
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137 elif state is FIND_LPAREN:
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138 if type is OP and token == "(":
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139 self.level = 1
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140 state = FIND_COMMA
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141 else:
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142 state = FIND_DOT
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143
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144 elif state is FIND_COMMA:
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145 if type is OP:
a7d609ea90cc Script by Tim Peters to discover illegal append() calls.
Guido van Rossum <guido@python.org>
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146 if token in ("(", "{", "["):
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Guido van Rossum <guido@python.org>
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147 self.level = self.level + 1
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Guido van Rossum <guido@python.org>
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148 elif token in (")", "}", "]"):
a7d609ea90cc Script by Tim Peters to discover illegal append() calls.
Guido van Rossum <guido@python.org>
parents:
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149 self.level = self.level - 1
a7d609ea90cc Script by Tim Peters to discover illegal append() calls.
Guido van Rossum <guido@python.org>
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150 if self.level == 0:
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Guido van Rossum <guido@python.org>
parents:
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151 state = FIND_DOT
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Guido van Rossum <guido@python.org>
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152 elif token == "," and self.level == 1:
a7d609ea90cc Script by Tim Peters to discover illegal append() calls.
Guido van Rossum <guido@python.org>
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153 self.nerrors = self.nerrors + 1
42427
46625e6122e9 Convert print statements to function calls in Tools/.
Collin Winter <collinw@gmail.com>
parents: 40587
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154 print("%s(%d):\n%s" % (self.fname, self.lineno,
46625e6122e9 Convert print statements to function calls in Tools/.
Collin Winter <collinw@gmail.com>
parents: 40587
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155 self.line))
11879
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Guido van Rossum <guido@python.org>
parents:
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156 # don't gripe about this stmt again
a7d609ea90cc Script by Tim Peters to discover illegal append() calls.
Guido van Rossum <guido@python.org>
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157 state = FIND_STMT
a7d609ea90cc Script by Tim Peters to discover illegal append() calls.
Guido van Rossum <guido@python.org>
parents:
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158
a7d609ea90cc Script by Tim Peters to discover illegal append() calls.
Guido van Rossum <guido@python.org>
parents:
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159 elif state is FIND_STMT:
a7d609ea90cc Script by Tim Peters to discover illegal append() calls.
Guido van Rossum <guido@python.org>
parents:
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160 if type is NEWLINE:
a7d609ea90cc Script by Tim Peters to discover illegal append() calls.
Guido van Rossum <guido@python.org>
parents:
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161 state = FIND_DOT
a7d609ea90cc Script by Tim Peters to discover illegal append() calls.
Guido van Rossum <guido@python.org>
parents:
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162
a7d609ea90cc Script by Tim Peters to discover illegal append() calls.
Guido van Rossum <guido@python.org>
parents:
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163 else:
31515
71a294bd7950 Replace backticks with repr() or "%r"
Walter Dörwald <walter@livinglogic.de>
parents: 25219
diff changeset
164 raise SystemError("unknown internal state '%r'" % (state,))
11879
a7d609ea90cc Script by Tim Peters to discover illegal append() calls.
Guido van Rossum <guido@python.org>
parents:
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165
a7d609ea90cc Script by Tim Peters to discover illegal append() calls.
Guido van Rossum <guido@python.org>
parents:
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166 self.state = state
a7d609ea90cc Script by Tim Peters to discover illegal append() calls.
Guido van Rossum <guido@python.org>
parents:
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167
a7d609ea90cc Script by Tim Peters to discover illegal append() calls.
Guido van Rossum <guido@python.org>
parents:
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168 if __name__ == '__main__':
a7d609ea90cc Script by Tim Peters to discover illegal append() calls.
Guido van Rossum <guido@python.org>
parents:
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169 main()