Regexp找到两个字符串的最长公共前缀

import re

def find_longest_common_prefix(str1, str2):
    pattern = re.compile(r'^(\w+).*')
    match1 = pattern.match(str1)
    match2 = pattern.match(str2)
    if match1 and match2:
        prefix1 = match1.group(1)
        prefix2 = match2.group(1)
        common_prefix = ''
        for i in range(min(len(prefix1), len(prefix2))):
            if prefix1[i] == prefix2[i]:
                common_prefix += prefix1[i]
            else:
                break
        return common_prefix
    else:
        return ''

# 示例用法
str1 = 'apple'
str2 = 'application'
result = find_longest_common_prefix(str1, str2)
print(result)  # 输出：'app'