Python字符串的類方法中,index、find、rindex等函數都是隻能查找一次字符串出現的位置,尷了個尬,所以我們需要正則表達式自己寫一個:
import re
[substr.start() for substr in re.finditer(子字符串, 原字符串)]
煮個栗子:
>>> somestr = 'sld;fjjnfa;sdjfsdfjnfj;ajfsjnfdjfnjnffejnf'
>>> sub = 'inf'
>>> import re
>>> [substr.start() for substr in re.finditer(sub , somestr)]
[6, 18, 27, 34, 39]
That’s all!