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File to dict

david asdrubale at gnx.it
Fri Dec 7 11:29:00 EST 2007 
On Fri, 07 Dec 2007 16:46:56 +0100, Glauco wrote:

> mrkafk at gmail.com ha scritto:
>> Hello everyone,
>> 
>> I have written this small utility function for transforming legacy file
>> to Python dict:
>> 
>> 
>> def lookupdmo(domain):
>>         lines = open('/etc/virtual/domainowners','r').readlines() lines
>>         = [ [y.lstrip().rstrip() for y in x.split(':')] for x in
>> lines]
>>         lines = [ x for x in lines if len(x) == 2 ] d = dict()
>>         for line in lines:
>>                 d[line[0]]=line[1]
>>         return d[domain]
>> 
>> 
> cache = None
> 
> def lookup( domain ):
>     if not cache:
>        cache = dict( [map( lambda x: x.strip(), x.split(':'))  for x in
> open('/etc/virtual/domainowners','r').readlines()])
>     return cache.get(domain)
> 

>>> lookup(1)
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "<stdin>", line 2, in lookup
UnboundLocalError: local variable 'cache' referenced before assignment

You miss the:
def lookup(domain):
	global cache
	...

bye
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