Name
split
Synopsis
r
.split(s
,maxsplit
=0)
Returns a list L
of the splits of
s
by r
(i.e.,
the substrings of s
that are separated by
non-overlapping, non-empty matches with
r
). For example, to eliminate all
occurrences of substring 'hello
' from a string, in
any mix of lowercase and uppercase letters, one way is:
import re rehello = re.compile(r'hello', re.IGNORECASE) astring = ''.join(rehello.split(astring))
When r
has n
groups, n
more items are interleaved in
L
between each pair of splits. Each of the
n
extra items is the substring of
s
matching
r
’s corresponding group
in that match, or None
if that group did not
participate in the match. For example, here’s one
way to remove whitespace only when it occurs between a colon and a
digit:
import re re_col_ws_dig = re.compile(r'(:)\s+(\d)') astring = ''.join(re_col_ws_dig.split(astring))
If maxsplit
is greater than
0
, at most
maxsplit
splits are in
L
, each followed by
n
items as above, while the trailing
substring of s
after
maxsplit
matches of
r
, if any, is
L
’s last item. For
example, to remove only the first occurrence of substring
'hello
' rather than all of them, change the last
statement in the first example above to:
astring = ''.join(rehello.split(astring, 1))
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