Mercurial > cpython-lru_cache-weakref

annotate Lib/uu.py @ 4566:6403c94de50d legacy-trunk

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Added safeguard against failure in __del__.
author Guido van Rossum <guido@python.org>
date Wed, 27 Nov 1996 19:39:58 +0000
parents 7c5f94f56f79
children 1148e7ebca35
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1 # uu.py
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2 # Copyright 1994 by Lance Ellinghouse
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3 # Cathedral City, California Republic, United States of America.
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4 # All Rights Reserved
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5 # Permission to use, copy, modify, and distribute this software and its
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6 # documentation for any purpose and without fee is hereby granted,
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7 # provided that the above copyright notice appear in all copies and that
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8 # both that copyright notice and this permission notice appear in
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9 # supporting documentation, and that the name of Lance Ellinghouse
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10 # not be used in advertising or publicity pertaining to distribution
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11 # of the software without specific, written prior permission.
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12 # LANCE ELLINGHOUSE DISCLAIMS ALL WARRANTIES WITH REGARD TO
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13 # THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
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14 # FITNESS, IN NO EVENT SHALL LANCE ELLINGHOUSE CENTRUM BE LIABLE
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15 # FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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16 # WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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17 # ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
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18 # OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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19 #
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20 # Modified by Jack Jansen, CWI, July 1995:
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21 # - Use binascii module to do the actual line-by-line conversion
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22 # between ascii and binary. This results in a 1000-fold speedup. The C
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23 # version is still 5 times faster, though.
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24 # - Arguments more compliant with python standard
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25 #
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26 # This file implements the UUencode and UUdecode functions.
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27
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28 # encode(in_file, out_file [,name, mode])
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29 # decode(in_file [, out_file, mode])
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30
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31 import binascii
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32 import os
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33 import string
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34
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35 Error = 'uu.Error'
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36
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37 def encode(in_file, out_file, name=None, mode=None):
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38 """Uuencode file"""
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39 #
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40 # If in_file is a pathname open it and change defaults
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41 #
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42 if in_file == '-':
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43 in_file = sys.stdin
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44 elif type(in_file) == type(''):
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45 if name == None:
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46 name = os.path.basename(in_file)
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47 if mode == None:
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48 try:
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49 mode = os.stat(in_file)[0]
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50 except AttributeError:
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51 pass
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52 in_file = open(in_file, 'rb')
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53 #
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54 # Open out_file if it is a pathname
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55 #
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56 if out_file == '-':
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57 out_file = sys.stdout
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58 elif type(out_file) == type(''):
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59 out_file = open(out_file, 'w')
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60 #
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61 # Set defaults for name and mode
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62 #
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63 if name == None:
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64 name = '-'
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65 if mode == None:
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66 mode = 0666
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67 #
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68 # Write the data
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69 #
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70 out_file.write('begin %o %s\n' % ((mode&0777),name))
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71 str = in_file.read(45)
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72 while len(str) > 0:
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73 out_file.write(binascii.b2a_uu(str))
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74 str = in_file.read(45)
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75 out_file.write(' \nend\n')
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76
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77
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78 def decode(in_file, out_file=None, mode=None):
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79 """Decode uuencoded file"""
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80 #
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81 # Open the input file, if needed.
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82 #
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83 if in_file == '-':
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84 in_file = sys.stdin
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85 elif type(in_file) == type(''):
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86 in_file = open(in_file)
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87 #
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88 # Read the header line, and fill in optional args if needed
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89 #
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90 hdr = in_file.readline()
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91 if not hdr:
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92 raise Error, 'Empty input file'
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93 hdrfields = string.split(hdr)
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94 if len(hdrfields) <> 3 or hdrfields[0] <> 'begin':
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95 raise Error, ('Incorrect uu header line', hdr)
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96 if out_file == None:
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97 out_file = hdrfields[2]
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98 if mode == None:
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99 mode = string.atoi(hdrfields[1])
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100 #
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101 # Open the output file
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102 #
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103 if out_file == '-':
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104 out_file = sys.stdout
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105 elif type(out_file) == type(''):
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106 fp = open(out_file, 'wb')
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107 try:
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108 os.path.chmod(out_file, mode)
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109 except AttributeError:
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110 pass
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111 out_file = fp
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112 #
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113 # Main decoding loop
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114 #
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115 str = in_file.readline()
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116 while str and str != 'end\n':
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117 out_file.write(binascii.a2b_uu(str))
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118 str = in_file.readline()
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119 if not str:
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120 raise Error, 'Truncated input file'
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121
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122 def test():
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123 """uuencode/uudecode main program"""
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124 import sys
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125 import getopt
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126
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127 dopt = 0
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128 topt = 0
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129 input = sys.stdin
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130 output = sys.stdout
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131 ok = 1
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132 try:
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133 optlist, args = getopt.getopt(sys.argv[1:], 'dt')
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134 except getopt.error:
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135 ok = 0
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136 if not ok or len(args) > 2:
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parents: 2915
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137 print 'Usage:', sys.argv[0], '[-d] [-t] [input [output]]'
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138 print ' -d: Decode (in stead of encode)'
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139 print ' -t: data is text, encoded format unix-compatible text'
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140 sys.exit(1)
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Jack Jansen <jack.jansen@cwi.nl>
parents: 2915
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141
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Jack Jansen <jack.jansen@cwi.nl>
parents: 2915
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142 for o, a in optlist:
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Jack Jansen <jack.jansen@cwi.nl>
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143 if o == '-d': dopt = 1
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Jack Jansen <jack.jansen@cwi.nl>
parents: 2915
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144 if o == '-t': topt = 1
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parents: 2915
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145
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parents: 2915
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146 if len(args) > 0:
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147 input = args[0]
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148 if len(args) > 1:
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149 output = args[1]
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150
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Jack Jansen <jack.jansen@cwi.nl>
parents: 2915
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151 if dopt:
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Jack Jansen <jack.jansen@cwi.nl>
parents: 2915
diff changeset
152 if topt:
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Jack Jansen <jack.jansen@cwi.nl>
parents: 2915
diff changeset
153 if type(output) == type(''):
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Jack Jansen <jack.jansen@cwi.nl>
parents: 2915
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154 output = open(output, 'w')
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parents: 2915
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155 else:
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parents: 2915
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156 print sys.argv[0], ': cannot do -t to stdout'
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parents: 2915
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157 sys.exit(1)
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parents: 2915
diff changeset
158 decode(input, output)
1872
32e6c3a671d0 mhlib.py: delay opening of sequences file so we don't overwrite it when
Guido van Rossum <guido@python.org>
parents:
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159 else:
3032
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Jack Jansen <jack.jansen@cwi.nl>
parents: 2915
diff changeset
160 if topt:
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Jack Jansen <jack.jansen@cwi.nl>
parents: 2915
diff changeset
161 if type(input) == type(''):
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parents: 2915
diff changeset
162 input = open(input, 'r')
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parents: 2915
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163 else:
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Jack Jansen <jack.jansen@cwi.nl>
parents: 2915
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164 print sys.argv[0], ': cannot do -t from stdin'
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parents: 2915
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165 sys.exit(1)
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parents: 2915
diff changeset
166 encode(input, output)
1872
32e6c3a671d0 mhlib.py: delay opening of sequences file so we don't overwrite it when
Guido van Rossum <guido@python.org>
parents:
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167
32e6c3a671d0 mhlib.py: delay opening of sequences file so we don't overwrite it when
Guido van Rossum <guido@python.org>
parents:
diff changeset
168 if __name__ == '__main__':
32e6c3a671d0 mhlib.py: delay opening of sequences file so we don't overwrite it when
Guido van Rossum <guido@python.org>
parents:
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169 test()