本文主要介绍Python中,进行字符串分割时指定多个分隔符的方法,以及相关的示例代码。

示例效果:

'121 34 adsfd' -> ['121 34 adsfd']
'dsfsd and adfd' -> ['dsfsd ', ' adfd']
'dsfsd & adfd' -> ['dsfsd ', ' adfd']
'dsfsd - adfd' -> ['dsfsd ', ' adfd']
'dsfsd and adfd and adsfa' -> ['dsfsd ', ' adfd and adsfa']
'dsfsd and adfd - adsfa' -> ['dsfsd ', ' adfd - adsfa']
'dsfsd - adfd and adsfa' -> ['dsfsd - adfd ', ' adsfa']

实现方法:

def split_new(inp, delims):
for d in delims:
result = inp.split(d, maxsplit=1)
if len(result) == 2: return result
return [inp]
strList= ['121 34 adsfd' , 'dsfsd and adfd', 'dsfsd & adfd' , 'dsfsd - adfd' , 'dsfsd and adfd and adsfa' , 'dsfsd and adfd - adsfa' , 'dsfsd - adfd and adsfa' ]
for t in strList:
print(repr(t), '->', split_new(t, ['and', '&', '-']))

输出:

'121 34 adsfd' -> ['121 34 adsfd']
'dsfsd and adfd' -> ['dsfsd ', ' adfd']
'dsfsd & adfd' -> ['dsfsd ', ' adfd']
'dsfsd - adfd' -> ['dsfsd ', ' adfd']
'dsfsd and adfd and adsfa' -> ['dsfsd ', ' adfd and adsfa']
'dsfsd and adfd - adsfa' -> ['dsfsd ', ' adfd - adsfa']
'dsfsd - adfd and adsfa' -> ['dsfsd - adfd ', ' adsfa']

或者

import re
strList = [
["121 34 adsfd", ["121 34 adsfd"]],
["dsfsd and adfd", ["dsfsd ", " adfd"]],
["dsfsd & adfd", ["dsfsd ", " adfd"]],
["dsfsd - adfd", ["dsfsd ", " adfd"]],
["dsfsd and adfd and adsfa", ["dsfsd ", " adfd and adsfa"]],
["dsfsd and adfd - adsfa", ["dsfsd ", " adfd - adsfa"]],
["dsfsd - adfd and adsfa", ["dsfsd - adfd ", " adsfa"]],
]
for s, result in strList:
res = re.split(r"and|&(?!.*and)|-(?!.*and|.*&)", s, maxsplit=1)
print(res)
assert res == result

输出:

['121 34 adsfd']
['dsfsd ', ' adfd']
['dsfsd ', ' adfd']
['dsfsd ', ' adfd']
['dsfsd ', ' adfd and adsfa']
['dsfsd ', ' adfd - adsfa']
['dsfsd - adfd ', ' adsfa']


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