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66 lines
1.6 KiB
Python
Executable file
66 lines
1.6 KiB
Python
Executable file
# A wrapper around the (optional) built-in class dbm, supporting keys
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# and values of almost any type instead of just string.
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# (Actually, this works only for keys and values that can be read back
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# correctly after being converted to a string.)
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class Dbm:
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def __init__(self, filename, mode, perm):
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import dbm.ndbm
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self.db = dbm.ndbm.open(filename, mode, perm)
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def __repr__(self):
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s = ''
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for key in self.keys():
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t = repr(key) + ': ' + repr(self[key])
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if s: t = ', ' + t
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s = s + t
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return '{' + s + '}'
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def __len__(self):
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return len(self.db)
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def __getitem__(self, key):
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return eval(self.db[repr(key)])
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def __setitem__(self, key, value):
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self.db[repr(key)] = repr(value)
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def __delitem__(self, key):
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del self.db[repr(key)]
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def keys(self):
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res = []
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for key in self.db.keys():
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res.append(eval(key))
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return res
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def has_key(self, key):
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return repr(key) in self.db
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def test():
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d = Dbm('@dbm', 'rw', 0o600)
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print(d)
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while 1:
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try:
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key = eval(input('key: '))
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if key in d:
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value = d[key]
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print('currently:', value)
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value = eval(input('value: '))
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if value is None:
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del d[key]
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else:
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d[key] = value
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except KeyboardInterrupt:
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print('')
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print(d)
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except EOFError:
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print('[eof]')
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break
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print(d)
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test()
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