Python-在文本文件中搜索列表中的任何字符串

Question

Apologies is this is against the rules. I have tried creating a simple Python script that searches a text file for any of the strings in a list.

KeyWord =['word', 'word1', 'word3']

if x in Keyword in open('Textfile.txt').read():
    print('True')

When i'm running the code I am getting a "name error: name 'x' is not defined" although i'm not sure why?

Answer 1

x is not defined. You forgot the loop that would define it. This will create a generator so you will need to consume it with any :

KeyWord =['word', 'word1', 'word3']

if any(x in open('Textfile.txt').read() for x in KeyWord):
    print('True')

This works but it will open and read the file multiple times so you may want

KeyWord = ['word', 'word1', 'word3']

file_content = open('test.txt').read()

if any(x in file_content for x in KeyWord):
    print('True')

This also works, but you should prefer to use with :

KeyWord = ['word', 'word1', 'word3']

with open('test.txt') as f:
    file_content = f.read()

if any(x in file_content for x in KeyWord):
    print('True')

All of the above solutions will stop as soon as the first word in the list is found in the file. If this is not desireable then

KeyWord = ['word', 'word1', 'word3']

with open('test.txt') as f:
    file_content = f.read()

for x in KeyWord:
    if x in file_content:
        print('True')

Answer 2

You could do this with a for loop as below. The issue with your code is it does not know what x is. You can define it inside of the loop to make x equal to a value in the KeyWord list for each run of the loop.

KeyWord =['word', 'word1', 'word3']
with open('Textfile.txt', 'r') as f:
    read_data = f.read()
for x in KeyWord:
    if x in read_data:
        print('True')