| Skip Montanaro | 9db49c8 | 2003-02-03 15:08:42 +0000 | [diff] [blame^] | 1 | #!/usr/bin/env python |
| 2 | |
| 3 | """ |
| 4 | Synopsis: %(prog)s [-h|-b|-r|-a|-d] dbfile [ picklefile ] |
| 5 | |
| 6 | Read the given picklefile as a series of key/value pairs and write to a new |
| 7 | bsddb database. If the database already exists, any contents are deleted. |
| 8 | The optional flags indicate the type of the database (bsddb hash, bsddb |
| 9 | btree, bsddb recno, anydbm, dbm). The default is hash. If a pickle file is |
| 10 | named it is opened for read access. If no pickle file is named, the pickle |
| 11 | input is read from standard input. |
| 12 | |
| 13 | Note that recno databases can only contain numeric keys, so you can't dump a |
| 14 | hash or btree database using bsddb2pickle.py and reconstitute it to a recno |
| 15 | database with %(prog)s. |
| 16 | """ |
| 17 | |
| 18 | import getopt |
| 19 | try: |
| 20 | import bsddb |
| 21 | except ImportError: |
| 22 | bsddb = None |
| 23 | try: |
| 24 | import dbm |
| 25 | except ImportError: |
| 26 | dbm = None |
| 27 | try: |
| 28 | import anydbm |
| 29 | except ImportError: |
| 30 | anydbm = None |
| 31 | import sys |
| 32 | try: |
| 33 | import cPickle as pickle |
| 34 | except ImportError: |
| 35 | import pickle |
| 36 | |
| 37 | prog = sys.argv[0] |
| 38 | |
| 39 | def usage(): |
| 40 | print >> sys.stderr, __doc__ % globals() |
| 41 | |
| 42 | def main(args): |
| 43 | try: |
| 44 | opts, args = getopt.getopt(args, "hbrda", |
| 45 | ["hash", "btree", "recno", "dbm", "anydbm"]) |
| 46 | except getopt.error: |
| 47 | usage() |
| 48 | return 1 |
| 49 | |
| 50 | if len(args) == 0 or len(args) > 2: |
| 51 | usage() |
| 52 | return 1 |
| 53 | elif len(args) == 1: |
| 54 | dbfile = args[0] |
| 55 | pfile = sys.stdin |
| 56 | else: |
| 57 | dbfile = args[0] |
| 58 | try: |
| 59 | pfile = file(args[1], 'rb') |
| 60 | except IOError: |
| 61 | print >> sys.stderr, "Unable to open", args[1] |
| 62 | return 1 |
| 63 | |
| 64 | dbopen = None |
| 65 | for opt, arg in opts: |
| 66 | if opt in ("-h", "--hash"): |
| 67 | try: |
| 68 | dbopen = bsddb.hashopen |
| 69 | except AttributeError: |
| 70 | print >> sys.stderr, "bsddb module unavailable." |
| 71 | return 1 |
| 72 | elif opt in ("-b", "--btree"): |
| 73 | try: |
| 74 | dbopen = bsddb.btopen |
| 75 | except AttributeError: |
| 76 | print >> sys.stderr, "bsddb module unavailable." |
| 77 | return 1 |
| 78 | elif opt in ("-r", "--recno"): |
| 79 | try: |
| 80 | dbopen = bsddb.rnopen |
| 81 | except AttributeError: |
| 82 | print >> sys.stderr, "bsddb module unavailable." |
| 83 | return 1 |
| 84 | elif opt in ("-a", "--anydbm"): |
| 85 | try: |
| 86 | dbopen = anydbm.open |
| 87 | except AttributeError: |
| 88 | print >> sys.stderr, "anydbm module unavailable." |
| 89 | return 1 |
| 90 | elif opt in ("-d", "--dbm"): |
| 91 | try: |
| 92 | dbopen = dbm.open |
| 93 | except AttributeError: |
| 94 | print >> sys.stderr, "dbm module unavailable." |
| 95 | return 1 |
| 96 | if dbopen is None: |
| 97 | if bsddb is None: |
| 98 | print >> sys.stderr, "bsddb module unavailable -" |
| 99 | print >> sys.stderr, "must specify dbtype." |
| 100 | return 1 |
| 101 | else: |
| 102 | dbopen = bsddb.hashopen |
| 103 | |
| 104 | try: |
| 105 | db = dbopen(dbfile, 'c') |
| 106 | except bsddb.error: |
| 107 | print >> sys.stderr, "Unable to open", dbfile, |
| 108 | print >> sys.stderr, "Check for format or version mismatch." |
| 109 | return 1 |
| 110 | else: |
| 111 | for k in db.keys(): |
| 112 | del db[k] |
| 113 | |
| 114 | while 1: |
| 115 | try: |
| 116 | (key, val) = pickle.load(pfile) |
| 117 | except EOFError: |
| 118 | break |
| 119 | db[key] = val |
| 120 | |
| 121 | db.close() |
| 122 | pfile.close() |
| 123 | |
| 124 | return 0 |
| 125 | |
| 126 | if __name__ == "__main__": |
| 127 | sys.exit(main(sys.argv[1:])) |