Mercurial > cpython-lru_cache-weakref

annotate Tools/scripts/pickle2db.py @ 58765:2ba7677bfa95 legacy-trunk

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
testCopysign was defined twice in test_math; combine the definitions
author Mark Dickinson <dickinsm@gmail.com>
date Sat, 06 Feb 2010 23:11:25 +0000
parents 46df08eb0839
children 893a4dc17a91
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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7bf7dac4dc49 convert pickles generated by db2pickle.py back to database files
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1 #!/usr/bin/env python
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2
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3 """
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4 Synopsis: %(prog)s [-h|-b|-g|-r|-a|-d] [ picklefile ] dbfile
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5
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6 Read the given picklefile as a series of key/value pairs and write to a new
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7 database. If the database already exists, any contents are deleted. The
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8 optional flags indicate the type of the output database:
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9
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10 -a - open using anydbm
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11 -b - open as bsddb btree file
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12 -d - open as dbm file
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13 -g - open as gdbm file
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14 -h - open as bsddb hash file
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15 -r - open as bsddb recno file
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16
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17 The default is hash. If a pickle file is named it is opened for read
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18 access. If no pickle file is named, the pickle input is read from standard
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19 input.
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20
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21 Note that recno databases can only contain integer keys, so you can't dump a
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22 hash or btree database using db2pickle.py and reconstitute it to a recno
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23 database with %(prog)s unless your keys are integers.
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24
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25 """
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26
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27 import getopt
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28 try:
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29 import bsddb
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30 except ImportError:
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31 bsddb = None
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32 try:
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33 import dbm
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34 except ImportError:
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35 dbm = None
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36 try:
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37 import gdbm
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38 except ImportError:
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39 gdbm = None
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40 try:
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41 import anydbm
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42 except ImportError:
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43 anydbm = None
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44 import sys
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45 try:
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46 import cPickle as pickle
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47 except ImportError:
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48 import pickle
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49
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50 prog = sys.argv[0]
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51
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52 def usage():
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53 sys.stderr.write(__doc__ % globals())
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54
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55 def main(args):
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56 try:
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57 opts, args = getopt.getopt(args, "hbrdag",
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58 ["hash", "btree", "recno", "dbm", "anydbm",
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59 "gdbm"])
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60 except getopt.error:
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61 usage()
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62 return 1
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63
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64 if len(args) == 0 or len(args) > 2:
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65 usage()
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66 return 1
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67 elif len(args) == 1:
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68 pfile = sys.stdin
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69 dbfile = args[0]
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70 else:
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71 try:
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72 pfile = open(args[0], 'rb')
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73 except IOError:
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74 sys.stderr.write("Unable to open %s\n" % args[0])
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75 return 1
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76 dbfile = args[1]
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77
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78 dbopen = None
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79 for opt, arg in opts:
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80 if opt in ("-h", "--hash"):
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81 try:
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82 dbopen = bsddb.hashopen
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83 except AttributeError:
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84 sys.stderr.write("bsddb module unavailable.\n")
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85 return 1
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86 elif opt in ("-b", "--btree"):
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87 try:
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88 dbopen = bsddb.btopen
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89 except AttributeError:
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90 sys.stderr.write("bsddb module unavailable.\n")
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91 return 1
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92 elif opt in ("-r", "--recno"):
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93 try:
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94 dbopen = bsddb.rnopen
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95 except AttributeError:
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96 sys.stderr.write("bsddb module unavailable.\n")
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97 return 1
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98 elif opt in ("-a", "--anydbm"):
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99 try:
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100 dbopen = anydbm.open
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101 except AttributeError:
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102 sys.stderr.write("anydbm module unavailable.\n")
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103 return 1
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104 elif opt in ("-g", "--gdbm"):
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105 try:
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106 dbopen = gdbm.open
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107 except AttributeError:
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108 sys.stderr.write("gdbm module unavailable.\n")
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109 return 1
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110 elif opt in ("-d", "--dbm"):
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111 try:
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112 dbopen = dbm.open
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113 except AttributeError:
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114 sys.stderr.write("dbm module unavailable.\n")
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115 return 1
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116 if dbopen is None:
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117 if bsddb is None:
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118 sys.stderr.write("bsddb module unavailable - ")
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119 sys.stderr.write("must specify dbtype.\n")
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120 return 1
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121 else:
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122 dbopen = bsddb.hashopen
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123
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124 try:
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125 db = dbopen(dbfile, 'c')
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126 except bsddb.error:
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127 sys.stderr.write("Unable to open %s. " % dbfile)
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128 sys.stderr.write("Check for format or version mismatch.\n")
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129 return 1
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130 else:
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131 for k in db.keys():
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132 del db[k]
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133
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134 while 1:
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135 try:
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136 (key, val) = pickle.load(pfile)
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137 except EOFError:
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138 break
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139 db[key] = val
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140
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141 db.close()
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142 pfile.close()
7bf7dac4dc49 convert pickles generated by db2pickle.py back to database files
Skip Montanaro <skip@pobox.com>
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143
7bf7dac4dc49 convert pickles generated by db2pickle.py back to database files
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144 return 0
7bf7dac4dc49 convert pickles generated by db2pickle.py back to database files
Skip Montanaro <skip@pobox.com>
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145
7bf7dac4dc49 convert pickles generated by db2pickle.py back to database files
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146 if __name__ == "__main__":
7bf7dac4dc49 convert pickles generated by db2pickle.py back to database files
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147 sys.exit(main(sys.argv[1:]))