如何搜索文件中的字符串

Question

我必須在文件中搜索s="xyz-123." s。 s從一些其他的代碼來

import re 
s="xyz-123." # This will come from some other code 

f=open("\path","r") 
searched_item = re.findall(r's[-]+?[0-9a-zA-Z-]+[-]+[a-zA-Z0-9]+[.]+[a-zA-Z0-9]+[.]+[a-zA-Z0-9]+', f.read()) 

Answer 1

如果s是一個固定的字符串那麼這將是簡單的使用字符串find而非涉及regex

def findall(p, s): 
    '''Yields all the positions of 
    the pattern p in the string s.''' 
    i = s.find(p) 
    while i != -1: 
     yield i 
     i = s.find(p, i+1) 

import re 
s="xyz-123." # This will come from some other code 
f=open("\path","r") 
file_content = f.read() 
for match_index in findall(s, file_content): 
    print match_index