在写爬虫的时候，经常需要处理cookie，requests库里的cookie是dict，但是headers['cookie']却是一个key=value的字符串。

下面是几个用推导式实现的转换函数，供大家参考。

#coding=utf-8

#create by :joshua zou

#create date :2018.5

import logging

#key=value列表转换成cookie字典

def cookie_list_2_dict(cookli):

if not isinstance(cookli,list):

logging.error('error list param...')

return {}

return {item.split('=')[0]:item.split('=')[1] for item in cookli}

#heads['cookie']字符串转换成cookie字典

def cookie_str_2_dict(cookstr):

if not isinstance(cookstr,str):

logging.error('error str param...')

return {}

cookstr = cookstr.split(';')

return cookie_list_2_dict(cookstr)

#cookie字典转换成key=value列表

def cookie_dict_2_list(cookdi):

if not isinstance(cookdi,dict):

logging.error('error dict param...')

return []

cookli = ["%s=%s" %(key,value) for key,value in cookdi.items()]

return cookli

#cookie字典转换成heads['cookie']字符串

def cookie_dict_2_str(cookdi):

if not isinstance(cookdi,dict):

logging.error('error dict param...')

return ""

cookli = cookie_dict_2_list(cookdi)

return ';'.join(cookli)

if __name__=='__main__':

cookies = {'AST': '1525005900068b4106e25d4', '___bz': '708632|41171989|2b7718|aladin2_freexx', 'platform': 'H5'}

cookli = cookie_dict_2_list(cookies)

cookstr = cookie_dict_2_str(cookies)

print('cook list',cookli)

print('cook str',cookstr)

cookdi1 = cookie_str_2_dict(cookstr)

cookdi2= cookie_list_2_dict(cookli)

print('cook dict 1',cookdi1)

print('cook dict 2',cookdi2)

输出结果：

cook list ['AST=1525005900068b4106e25d4', '___bz=708632|41171989|2b7718|aladin2_freexx', 'platform=H5']

cook str AST=1525005900068b4106e25d4;___bz=708632|41171989|2b7718|aladin2_freexx;platform=H5

cook dict 1 {'AST': '1525005900068b4106e25d4', '___bz': '708632|41171989|2b7718|aladin2_freexx', 'platform': 'H5'}

cook dict 2 {'AST': '1525005900068b4106e25d4', '___bz': '708632|41171989|2b7718|aladin2_freexx', 'platform': 'H5'}

 

以上。。。

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