1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
|
# A wrapper around the (optional) built-in class dbm, supporting keys
# and values of almost any type instead of just string.
# (Actually, this works only for keys and values that can be read back
# correctly after being converted to a string.)
def opendbm(filename, mode, perm):
return Dbm().init(filename, mode, perm)
class Dbm:
def init(self, filename, mode, perm):
import dbm
self.db = dbm.open(filename, mode, perm)
return self
def __repr__(self):
s = ''
for key in self.keys():
t = `key` + ': ' + `self[key]`
if s: t = t + ', '
s = s + t
return '{' + s + '}'
def __len__(self):
return len(self.db)
def __getitem__(self, key):
return eval(self.db[`key`])
def __setitem__(self, key, value):
self.db[`key`] = `value`
def __delitem__(self, key):
del self.db[`key`]
def keys(self):
res = []
for key in self.db.keys():
res.append(eval(key))
return res
def has_key(self, key):
return self.db.has_key(`key`)
def test():
d = opendbm('@dbm', 'rw', 0666)
print d
while 1:
try:
key = eval(raw_input('key: '))
if d.has_key(key):
value = d[key]
print 'currently:', value
value = eval(raw_input('value: '))
if value == None:
del d[key]
else:
d[key] = value
except KeyboardInterrupt:
print ''
print d
except EOFError:
print '[eof]'
break
print d
test()
|
