mirror of
https://github.com/python/cpython.git
synced 2024-11-26 19:34:19 +08:00
e2b61e0190
* reverse order of files on the command line in pickle2db.py to make it symmetrical with db2pickle.py in the two-arg case (src, then dest)
148 lines
3.8 KiB
Python
148 lines
3.8 KiB
Python
#!/usr/bin/env python
|
|
|
|
"""
|
|
Synopsis: %(prog)s [-h|-b|-g|-r|-a|-d] [ picklefile ] dbfile
|
|
|
|
Read the given picklefile as a series of key/value pairs and write to a new
|
|
database. If the database already exists, any contents are deleted. The
|
|
optional flags indicate the type of the output database:
|
|
|
|
-a - open using anydbm
|
|
-b - open as bsddb btree file
|
|
-d - open as dbm file
|
|
-g - open as gdbm file
|
|
-h - open as bsddb hash file
|
|
-r - open as bsddb recno file
|
|
|
|
The default is hash. If a pickle file is named it is opened for read
|
|
access. If no pickle file is named, the pickle input is read from standard
|
|
input.
|
|
|
|
Note that recno databases can only contain integer keys, so you can't dump a
|
|
hash or btree database using db2pickle.py and reconstitute it to a recno
|
|
database with %(prog)s unless your keys are integers.
|
|
|
|
"""
|
|
|
|
import getopt
|
|
try:
|
|
import bsddb
|
|
except ImportError:
|
|
bsddb = None
|
|
try:
|
|
import dbm
|
|
except ImportError:
|
|
dbm = None
|
|
try:
|
|
import gdbm
|
|
except ImportError:
|
|
gdbm = None
|
|
try:
|
|
import anydbm
|
|
except ImportError:
|
|
anydbm = None
|
|
import sys
|
|
try:
|
|
import cPickle as pickle
|
|
except ImportError:
|
|
import pickle
|
|
|
|
prog = sys.argv[0]
|
|
|
|
def usage():
|
|
sys.stderr.write(__doc__ % globals())
|
|
|
|
def main(args):
|
|
try:
|
|
opts, args = getopt.getopt(args, "hbrdag",
|
|
["hash", "btree", "recno", "dbm", "anydbm",
|
|
"gdbm"])
|
|
except getopt.error:
|
|
usage()
|
|
return 1
|
|
|
|
if len(args) == 0 or len(args) > 2:
|
|
usage()
|
|
return 1
|
|
elif len(args) == 1:
|
|
pfile = sys.stdin
|
|
dbfile = args[0]
|
|
else:
|
|
try:
|
|
pfile = open(args[0], 'rb')
|
|
except IOError:
|
|
sys.stderr.write("Unable to open %s\n" % args[0])
|
|
return 1
|
|
dbfile = args[1]
|
|
|
|
dbopen = None
|
|
for opt, arg in opts:
|
|
if opt in ("-h", "--hash"):
|
|
try:
|
|
dbopen = bsddb.hashopen
|
|
except AttributeError:
|
|
sys.stderr.write("bsddb module unavailable.\n")
|
|
return 1
|
|
elif opt in ("-b", "--btree"):
|
|
try:
|
|
dbopen = bsddb.btopen
|
|
except AttributeError:
|
|
sys.stderr.write("bsddb module unavailable.\n")
|
|
return 1
|
|
elif opt in ("-r", "--recno"):
|
|
try:
|
|
dbopen = bsddb.rnopen
|
|
except AttributeError:
|
|
sys.stderr.write("bsddb module unavailable.\n")
|
|
return 1
|
|
elif opt in ("-a", "--anydbm"):
|
|
try:
|
|
dbopen = anydbm.open
|
|
except AttributeError:
|
|
sys.stderr.write("anydbm module unavailable.\n")
|
|
return 1
|
|
elif opt in ("-g", "--gdbm"):
|
|
try:
|
|
dbopen = gdbm.open
|
|
except AttributeError:
|
|
sys.stderr.write("gdbm module unavailable.\n")
|
|
return 1
|
|
elif opt in ("-d", "--dbm"):
|
|
try:
|
|
dbopen = dbm.open
|
|
except AttributeError:
|
|
sys.stderr.write("dbm module unavailable.\n")
|
|
return 1
|
|
if dbopen is None:
|
|
if bsddb is None:
|
|
sys.stderr.write("bsddb module unavailable - ")
|
|
sys.stderr.write("must specify dbtype.\n")
|
|
return 1
|
|
else:
|
|
dbopen = bsddb.hashopen
|
|
|
|
try:
|
|
db = dbopen(dbfile, 'c')
|
|
except bsddb.error:
|
|
sys.stderr.write("Unable to open %s. " % dbfile)
|
|
sys.stderr.write("Check for format or version mismatch.\n")
|
|
return 1
|
|
else:
|
|
for k in db.keys():
|
|
del db[k]
|
|
|
|
while 1:
|
|
try:
|
|
(key, val) = pickle.load(pfile)
|
|
except EOFError:
|
|
break
|
|
db[key] = val
|
|
|
|
db.close()
|
|
pfile.close()
|
|
|
|
return 0
|
|
|
|
if __name__ == "__main__":
|
|
sys.exit(main(sys.argv[1:]))
|