mirror of https://github.com/python/cpython
51 lines
1.5 KiB
Python
51 lines
1.5 KiB
Python
"""A generic interface to all dbm clones.
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Instead of
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import dbm
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d = dbm.open(file, 'rw', 0666)
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use
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import anydbm
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d = anydbm.open(file)
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The returned object is a dbm, gdbm or (on the Mac) dbmac object,
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dependent on availability of the modules (tested in this order).
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It has the following interface (key and data are strings):
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d[key] = data # store data at key (may override data at
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# existing key)
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data = d[key] # retrieve data at key (raise KeyError if no
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# such key)
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del d[key] # delete data stored at key (raises KeyError
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# if no such key)
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flag = d.has_key(key) # true if the key exists
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list = d.keys() # return a list of all existing keys (slow!)
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Future versions may change the order in which implementations are
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tested for existence, add interfaces to other db-like implementations
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(e.g. BSD Hash), and (in the presence of multiple implementations)
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decide which module to use based upon the extension or contents of an
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existing database file.
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The open function has an optional second argument. This can be set to
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'r' to open the database for reading only. Don't pas an explicit 'w'
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or 'rw' to open it for writing, as the different interfaces have
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different interpretation of their mode argument if it isn't 'r'.
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"""
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try:
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import dbm
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def open(filename, mode = 'rw'):
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return dbm.open(filename, mode, 0666)
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except ImportError:
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try:
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import gdbm
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def open(filename, mode = 'w'):
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return gdbm.open(filename, mode, 0666)
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except ImportError:
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import dbmac
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open = dbmac.open
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