python find函数用法

liumilan2009

if( sign_weights[i].find("1110:") )!=-1:我想查找有这个字符串

但是这个有缺陷，如果有子串是111110:的这样也会匹配到。

有没有办法搜索以1110:开头的，
我试了前面加个^，但是好像不行

cnvbird

用正则试一试呢

1. 
   
2. import re
   
3. if re.search(r'(1110:)',sign_weights[i]):
   
4.     your_logical_codes
   

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ssfjhh

1. help(str.startswith)
   
2. Help on method_descriptor:
   
3. 
   
4. startswith(...)
   
5.     S.startswith(prefix[, start[, end]]) -> bool
   
6.    
   
7.     Return True if S starts with the specified prefix, False otherwise.
   
8.     With optional start, test S beginning at that position.
   
9.     With optional end, stop comparing S at that position.
   
10.     prefix can also be a tuple of strings to try.

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albert32

good:wink::wink::wink::wink: