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comparison pyloader/cast.py @ 2:6cb7696edc4d

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add some more stuff for string loady type things and rearrange structure
author Jeff Hammel <jhammel@mozilla.com>
date Tue, 10 May 2011 09:28:40 -0700
parents
children 5ce55f6c8964
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1:47d9472e7754 2:6cb7696edc4d
1 class StringCastException(Exception):
2 """raised on unsucessful cast"""
3
4 class StringCaster(object):
5 """cast strings to other things"""
6 # as yet unused
7
8 def __init__(self, *casts):
9 self.casts = casts
10
11 def __call__(self, string):
12 for cast in self.casts:
13 try:
14 return cast(string)
15 except:
16 continue
17 return string
18
19 ### casters
20
21 def str2bool(string):
22 mapping = {'true': True,
23 'True': True,
24 'false': False,
25 'False': False}
26 return mapping[string]
27
28 def str2list(string, separator=None):
29 string = string.rstrip(separator)
30 return [i.strip() for i in string.split(separator)]
31
32 def str2args(string, separator=None):
33 args = str2list(string, separator)
34 _args = []
35 kw = {}
36 for arg in args:
37 if '=' in arg:
38 pass
39 else:
40 _args.append(arg)
41 return _args, kw
42
43 # convenience functions
44 casts = [int, float, str2bool, str2list, str2args]
45 cast = StringCaster(*casts)
46
47 if __name__ == '__main__':
48 import sys
49 for arg in sys.argv[1:]:
50 print cast(arg)