在TXT文件中用逗号替换所有数字中的点

import re

# 读取TXT文件
with open('file.txt', 'r') as file:
    content = file.read()

# 查找数字中的点并替换
pattern = r'\d+\.\d+'
replaced_content = re.sub(pattern, lambda match: match.group().replace('.', ','), content)

# 更新文件内容
with open('file.txt', 'w') as file:
    file.write(replaced_content)