On 2014-07-10 16:37, fl wrote:
Hi,
This example is from the link:
https://wiki.python.org/moin/RegularExpression
I have thought about it quite a while without a clue yet. I notice that it uses
double quote ", in contrast to ' which I see more often until now.
It looks very complicated to me. Could you simplified it to a simple example?
Thanks,
import re
split_up = re.split(r"(\(\([^)]+\)\))",
"This is a ((test)) of the ((emergency broadcasting
station.))")
...which produces:
["This is a ", "((test))", " of the ", "((emergency broadcasting station.))" ]
No it doesn't; you've omitted the final string.
The regex means:
( Start of capture group.
\( Literal "(".
\( Literal "(".
[^)]+ One or more repeats of any character except a literal ")".
\) Literal ")".
\) Literal ")".
) End of capture group.
.split returns a list of the parts of the string between the matches,
and if, as in this example, there are capture groups, then those too:
[
'This is a ', # The part before the first
# match.
'((test))', # The first match (group 1).
' of the ', # The part between the first
# and second matches.
'((emergency broadcasting station.))', # The second match.
'' # The part after the second
# match.
]
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