Mercurial > cpython-lru_cache-weakref

annotate Lib/uu.py @ 58925:eecf1bef052d 2.6

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Merged revisions 78207 via svnmerge from svn+ssh://pythondev@svn.python.org/python/trunk ........ r78207 | ezio.melotti | 2010-02-17 01:26:09 +0200 (Wed, 17 Feb 2010) | 1 line #7930: fix stripid ........
author Ezio Melotti <ezio.melotti@gmail.com>
date Tue, 16 Feb 2010 23:29:44 +0000
parents cf0e68562604
children d8d33648d1b2
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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1 #! /usr/bin/env python
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2
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3 # Copyright 1994 by Lance Ellinghouse
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4 # Cathedral City, California Republic, United States of America.
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5 # All Rights Reserved
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6 # Permission to use, copy, modify, and distribute this software and its
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7 # documentation for any purpose and without fee is hereby granted,
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8 # provided that the above copyright notice appear in all copies and that
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9 # both that copyright notice and this permission notice appear in
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10 # supporting documentation, and that the name of Lance Ellinghouse
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11 # not be used in advertising or publicity pertaining to distribution
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12 # of the software without specific, written prior permission.
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13 # LANCE ELLINGHOUSE DISCLAIMS ALL WARRANTIES WITH REGARD TO
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14 # THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
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15 # FITNESS, IN NO EVENT SHALL LANCE ELLINGHOUSE CENTRUM BE LIABLE
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16 # FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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17 # WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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18 # ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
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19 # OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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20 #
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21 # Modified by Jack Jansen, CWI, July 1995:
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22 # - Use binascii module to do the actual line-by-line conversion
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23 # between ascii and binary. This results in a 1000-fold speedup. The C
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24 # version is still 5 times faster, though.
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25 # - Arguments more compliant with python standard
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26
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27 """Implementation of the UUencode and UUdecode functions.
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28
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29 encode(in_file, out_file [,name, mode])
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30 decode(in_file [, out_file, mode])
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31 """
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32
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33 import binascii
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34 import os
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35 import sys
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36
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37 __all__ = ["Error", "encode", "decode"]
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38
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39 class Error(Exception):
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40 pass
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41
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42 def encode(in_file, out_file, name=None, mode=None):
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43 """Uuencode file"""
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44 #
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45 # If in_file is a pathname open it and change defaults
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46 #
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47 if in_file == '-':
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48 in_file = sys.stdin
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49 elif isinstance(in_file, basestring):
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50 if name is None:
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51 name = os.path.basename(in_file)
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52 if mode is None:
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53 try:
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54 mode = os.stat(in_file).st_mode
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55 except AttributeError:
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56 pass
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57 in_file = open(in_file, 'rb')
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58 #
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59 # Open out_file if it is a pathname
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60 #
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61 if out_file == '-':
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62 out_file = sys.stdout
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63 elif isinstance(out_file, basestring):
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64 out_file = open(out_file, 'w')
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65 #
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66 # Set defaults for name and mode
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67 #
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68 if name is None:
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69 name = '-'
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70 if mode is None:
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71 mode = 0666
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72 #
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73 # Write the data
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74 #
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75 out_file.write('begin %o %s\n' % ((mode&0777),name))
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76 data = in_file.read(45)
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77 while len(data) > 0:
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78 out_file.write(binascii.b2a_uu(data))
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79 data = in_file.read(45)
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80 out_file.write(' \nend\n')
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81
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82
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83 def decode(in_file, out_file=None, mode=None, quiet=0):
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84 """Decode uuencoded file"""
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85 #
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86 # Open the input file, if needed.
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87 #
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88 if in_file == '-':
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89 in_file = sys.stdin
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90 elif isinstance(in_file, basestring):
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91 in_file = open(in_file)
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92 #
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93 # Read until a begin is encountered or we've exhausted the file
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94 #
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95 while True:
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96 hdr = in_file.readline()
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97 if not hdr:
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98 raise Error('No valid begin line found in input file')
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99 if not hdr.startswith('begin'):
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100 continue
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101 hdrfields = hdr.split(' ', 2)
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102 if len(hdrfields) == 3 and hdrfields[0] == 'begin':
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103 try:
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104 int(hdrfields[1], 8)
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105 break
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106 except ValueError:
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107 pass
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108 if out_file is None:
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109 out_file = hdrfields[2].rstrip()
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110 if os.path.exists(out_file):
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111 raise Error('Cannot overwrite existing file: %s' % out_file)
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112 if mode is None:
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113 mode = int(hdrfields[1], 8)
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114 #
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115 # Open the output file
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116 #
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117 opened = False
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118 if out_file == '-':
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119 out_file = sys.stdout
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120 elif isinstance(out_file, basestring):
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121 fp = open(out_file, 'wb')
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122 try:
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123 os.path.chmod(out_file, mode)
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124 except AttributeError:
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125 pass
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126 out_file = fp
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127 opened = True
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128 #
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129 # Main decoding loop
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130 #
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131 s = in_file.readline()
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132 while s and s.strip() != 'end':
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133 try:
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134 data = binascii.a2b_uu(s)
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135 except binascii.Error, v:
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136 # Workaround for broken uuencoders by /Fredrik Lundh
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137 nbytes = (((ord(s[0])-32) & 63) * 4 + 5) // 3
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138 data = binascii.a2b_uu(s[:nbytes])
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139 if not quiet:
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140 sys.stderr.write("Warning: %s\n" % v)
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141 out_file.write(data)
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142 s = in_file.readline()
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143 if not s:
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144 raise Error('Truncated input file')
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145 if opened:
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146 out_file.close()
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147
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148 def test():
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149 """uuencode/uudecode main program"""
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150
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151 import optparse
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152 parser = optparse.OptionParser(usage='usage: %prog [-d] [-t] [input [output]]')
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153 parser.add_option('-d', '--decode', dest='decode', help='Decode (instead of encode)?', default=False, action='store_true')
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154 parser.add_option('-t', '--text', dest='text', help='data is text, encoded format unix-compatible text?', default=False, action='store_true')
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155
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156 (options, args) = parser.parse_args()
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157 if len(args) > 2:
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158 parser.error('incorrect number of arguments')
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159 sys.exit(1)
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160
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161 input = sys.stdin
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162 output = sys.stdout
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163 if len(args) > 0:
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164 input = args[0]
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165 if len(args) > 1:
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166 output = args[1]
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167
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168 if options.decode:
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169 if options.text:
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170 if isinstance(output, basestring):
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171 output = open(output, 'w')
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172 else:
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173 print sys.argv[0], ': cannot do -t to stdout'
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174 sys.exit(1)
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175 decode(input, output)
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176 else:
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177 if options.text:
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178 if isinstance(input, basestring):
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179 input = open(input, 'r')
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180 else:
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181 print sys.argv[0], ': cannot do -t from stdin'
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182 sys.exit(1)
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183 encode(input, output)
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184
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185 if __name__ == '__main__':
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186 test()