如何在Python中检查字符串是否在文本文件中并打印行？

如何在Python中检查字符串是否在文本文件中并打印行？

您应该尝试这样的事情：

import redef check_string():    #no need to pass arguments to function if you're not using them    w = raw_input("Input the English word: ")    #open the file using `with` context manager, it'll automatically close the file for you    with open("example.txt") as f:        found = False        for line in f:  #iterate over the file one line at a time(memory efficient) if re.search("b{0}b".format(w),line):    #if string found is in current line then print it     print line     found = True        if not found: print('The translation cannot be found!')check_string() #now call the function

如果您要搜索确切的单词而不只是子字符串，那么我建议

regex

在这里使用。

例：

>>> import re>>> strs = "foo bar spamm">>> "spam" in strs        True>>> bool(re.search("b{0}b".format("spam"),strs))False