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vio <vmilitaru at sympatico.ca> writes:
>gets nothing. The reference docs
>(www.python.org/doc/current/lib/module-re.html) talk about
>"expand" and "group". But if I do:
.group() and .expand() are methods of the MatchObject you get back
from a successful search() or match() call. The usual pattern for using a
regex is:
m = regexp1.search('string being matched against')
if m is None:
# No match; report an error? do nothing?
...
else:
# It did match; 'm' is now a MatchObject.
myBackref1 = m.group(1)
>(Question 2: is there a magic spell to cast a variable, from an
>'object' into a 'string', for example. )
An arbitrary cast, from anything to anything? No. There are specific
conversions: str(foo) converts to a string, int(foo) converts to an
integer, and float(), long() behave similarly. All of these functions
raise a TypeError exception if the argument can't be converted; for
example, int({1:2}) raises a TypeError because converting a dictionary
to an integer isn't really meaningful.
--amk
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