如何在Python中调试正则表达式？

import re

pattern = re.compile(r'\d+')

text = 'There are 10 cats and 15 dogs in the house.'

match = pattern.search(text)
print(match.group())  # 输出：10

matches = pattern.findall(text)
print(matches)  # 输出：['10', '15']

for match in re.finditer(r'\d+', text):
    print(match.group())

new_text = re.sub(r'\d+', '*', text)
print(new_text)  # 输出：There are * cats and * dogs in the house.

words = re.split(r'\W+', text)
print(words)  # 输出：['There', 'are', '10', 'cats', 'and', '15', 'dogs', 'in', 'the', 'house']

text = 'There are 10.5 cats and 15 dogs in the house.'
pattern = re.compile(re.escape(text))

import re

pattern = re.compile(r'\d+', re.DEBUG)

import re

pattern = re.compile(r'''
    \d+  # 匹配数字
    \s+  # 匹配空格
    [a-zA-Z]+  # 匹配字母
''', re.VERBOSE)