André a écrit :
(snip)
you don't need to use pattern.items()...
Here is something I use (straight cut-and-paste):
def parse_single_line(self, line):
'''Parses a given line to see if it match a known pattern'''
for name in self.patterns:
result = self.patterns[name].match(line)
FWIW, this is more expansive than iterating over (key, value) tuples
using dict.items(), since you have one extra call to dict.__getitem__
per entry.
if result is not None:
return name, result.groups()
return None, line
where self.patterns is something like
self.patterns={
'pattern1': re.compile(...),
'pattern2': re.compile(...)
}
The one potential problem with the method as I wrote it is that
sometimes a more generic pattern gets matched first whereas a more
specific pattern may be desired.
As usual when order matters, the solution is to use a list of (name,
whatever) tuples instead of a dict. You can still build a dict from this
list when needed (the dict initializer accepts a list of (name, object)
as argument).
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