前言
Python版本：3.7.4
split(pattern, string, maxsplit=0, flags=0)
- 原文
- Split the source string by the occurrences of the pattern,
returning a list containing the resulting substrings. If
capturing parentheses are used in pattern, then the text of all
groups in the pattern are also returned as part of the resulting
list. If maxsplit is nonzero, at most maxsplit splits occur,
and the remainder of the string is returned as the final element
of the list. - 就是
- 根據pattern分割文本
當使用【捕捉括號】時，所有組都會返回
maxsplit限制最大切割次數，默認無限切
最終返回list
一般情況
from re import split
a = split(',', 'aa,bb')
print(a)
['aa', 'bb']
限制切割次數
from re import split
a = split(',', 'aa,bb,cc', 1)
print(a)
['aa', 'bb,cc']
結果出現’’
from re import split
a = split(',', ',aa,,bb,')
print(a)
['', 'aa', '', 'bb', '']
pattern使用括號
from re import split
a = split('(,)', 'aa,')
print(a)
['aa', ',', '']
pattern使用多重括號
from re import split
a = split('aa(bb(cc))', 'ZaabbccZ')
print(a)
['Z', 'bbcc', 'cc', 'Z']
patter同時用 () 和 | 會出現None
from re import split
a = split(',|(;)', 'aa,bb;cc')
print(a)
['aa', None, 'bb', ';', 'cc']
排除空值的寫法
from re import split
a = [i for i in split(',|(;)', ',aa,;bb,')if i]
print(a)
['aa', ';', 'bb']