Question

我是python的新手。考虑我有一个列表['python','java','ruby']

我有一个文本文件：

jrubyk
knwdjavawe
weqkpythonqwe
1ruby.e

预期产出：

ruby
java
python
ruby

我需要打印隐藏在子列表中的列表中的字符串。有没有办法获得它？

Answer 1

当我想从较大的字符串中删除某些子字符串时，我倾向于使用regular expressions。这是一种不优雅但可读的方式。

import re

python_matcher = re.compile('python')
java_matcher = re.compile('java')
ruby_matcher = re.compile('ruby')

hidden_text_list = open('hidden.txt', 'r').readlines()

for line in hidden_text_list:
    python_matched = python_matcher.search(line)
    java_matched = java_matcher.search(line)
    ruby_matched = ruby_matcher.search(line)

    if python_matched:
        print python_matched.group()
    elif java_matched:
        print java_matched.group()
    elif ruby_matched:
        print ruby_matched.group()

Answer 2

蛮力方法是：

hidden_strings = ['python','java','ruby']
with open('path/to/textfile/as/in/example.txt') as infile:
    for line in infile:
        for hidden_string in hidden_strings:
            if hidden_string in line:
                print(hidden_string)

Python从列表中的子串打印字符串

2 个答案: