On 2009-08-03 12:29, MRAB wrote:
Robert Kern wrote:
[snip]
for line in readThis:
key_match = key.search(line)
if key_match is not None:
this_key = key_match.group(1)
# ... do something with this_key
map_match = map.search(line)
if map_match is not None:
this_map = map_match.group(1)
# ... do something with this_map
parcel_match = parcel.search(line)
if parcel_match is not None:
this_parcel = parcel_match.group(1)
# ... do something with this_parcel
re.search and re.match will return a MatchObject if successful or None
if unsuccessful. A MatchObject is always true, so you can simplify to:
...
if key_match:
this_key = key_match.group(1)
# ... do something with this_key
...
True, but I prefer to maintain a consistent style for None-testing regardless of
whether or not I am sure the not-None type will have a suitable __nonzero__
implementation.
--
Robert Kern
"I have come to believe that the whole world is an enigma, a harmless enigma
that is made terrible by our own mad attempt to interpret it as though it had
an underlying truth."
-- Umberto Eco
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