Python正则表达式findall到输出文件中

使用Python的正则表达式模块re，我们可以通过findall方法来查找匹配某个模式的所有内容，并将其输出到一个文件中。这样做可以方便我们对大量文本进行处理和分析。

python
import re
def extract_words(sentence):
    pattern = r'\b\w+\b'  # 匹配一个或多个单词字符
    words = re.findall(pattern, sentence)
    return words
def output_to_file(words, filename):
    with open(filename, 'w') as file:
        for word in words:
            file.write(word + '\n')
sentence = "Python是一种强大而灵活的编程语言，它可以用于Web开发、数据分析、人工智能等领域。"
words = extract_words(sentence)
output_to_file(words, 'output.txt')

python
import re
def extract_links(html):
    pattern = r''  # 匹配以结尾的内容
    links = re.findall(pattern, html)
    return links
def output_to_file(links, filename):
    with open(filename, 'w') as file:
        for link in links:
            file.write(link + '\n')
html = '''
Example 1
Example 2
Example 3
'''
links = extract_links(html)
output_to_file(links, 'output.txt')

python
import re
def extract_words(sentence):
    pattern = r'\b\w+\b'  # 匹配一个或多个单词字符
    words = re.findall(pattern, sentence)
    return words
def output_to_file(words, filename):
    with open(filename, 'w') as file:
        for word in words:
            file.write(word + '\n')
sentence = "Python是一种强大而灵活的编程语言，它可以用于Web开发、数据分析、人工智能等领域。"
words = extract_words(sentence)
output_to_file(words, 'output.txt')

python
import re
def extract_links(html):
    pattern = r''  # 匹配以结尾的内容
    links = re.findall(pattern, html)
    return links
def output_to_file(links, filename):
    with open(filename, 'w') as file:
        for link in links:
            file.write(link + '\n')
html = '''
Example 1
Example 2
Example 3
'''
links = extract_links(html)
output_to_file(links, 'output.txt')