python3中(?P的正则应用

import re
'''
其中？P可以理解为将字符串s分组处理并命名为province、city、block
'''
s = '13g00x21yy'
res = re.search('(?P<province>\d{2}).*(?P<city>\d{2}).*(?P<block>\d{2}).*',s)
print(res.groupdict())

"""

运行结果
{'province': '13', 'city': '00', 'block': '21'}
"""

　　

案例2：

import re

s_old_content = '''
resValue "string", "mi_app_id", "2882303761520217047"
resValue "string", "mi_app_key", "5432021761047"
'''

p_re = re.compile(r'(?P<key_str>"%s"),[ ]*(?P<value_str>".*")' % 'mi_app_id')
p_search = p_re.search(s_old_content)
if not p_search:
print("not found")
d_search = p_search.groupdict()
print(d_search)
#{'key_str': '"mi_app_id"', 'value_str': '"2882303761520217047"'}