如何在使用re之前在單詞前面找到字符？

Question

所以我想獲得字面前的數字。我將如何做到這一點？

import re 
string='latin 1,394 pies' 
m = re.search('', string) 
print(m.group(0)) 
#want 1,394 

Answer 1

In [137]: import re 
    ...: string='latin 1,394 pies' 
    ...: m = re.search(r'([\d,]+) pies', string) 
    ...: print(m.group(1)) 
    ...: 
1,394 



([\d,]+) pies 

Regex101 Explanation