Quick Answer

Option 1

import requestss = requests.session()s.cookies.set("COOKIE_NAME", "the cookie works", domain="example.com")

Option 2

import requestss = requests.session()# Note that domain keyword parameter is the only optional parameter herecookie_obj = requests.cookies.create_cookie(domain="example.com",name="COOKIE_NAME",value="the cookie works")s.cookies.set_cookie(cookie_obj)

Detailed Answer

I do not know if this technique was valid when the original question was asked, but ideally you would generate your own cookie object using requests.cookies.create_cookie(name,value,**kwargs) and then add it to the cookie jar via requests.cookies.RequestsCookieJar.set_cookie(cookie,*args,**kwargs). See the source/documentation here.

Adding a custom cookie to requests session

>>> import requests>>> s = requests.session()>>> print(s.cookies)<RequestsCookieJar[]>>>> required_args = {        'name':'COOKIE_NAME',        'value':'the cookie works'    }>>> optional_args = {    'version':0,    'port':None,#NOTE: If domain is a blank string or not supplied this creates a# "super cookie" that is supplied to all domains.    'domain':'example.com',    'path':'/',    'secure':False,    'expires':None,    'discard':True,    'comment':None,    'comment_url':None,    'rest':{'HttpOnly': None},    'rfc2109':False}>>> my_cookie = requests.cookies.create_cookie(**required_args,**optional_args)# Counter-intuitively, set_cookie _adds_ the cookie to your session object,#  keeping existing cookies in place>>> s.cookies.set_cookie(my_cookie)>>> s.cookies<RequestsCookieJar[Cookie(version=0, name='COOKIE_NAME', value='the cookie works', port=None, port_specified=False, domain='www.domain.com', domain_specified=True, domain_initial_dot=False, path='/', path_specified=True, secure=False, expires=None, discard=True, comment=None, comment_url=None, rest={'HttpOnly': None}, rfc2109=False)]>

Bonus: Lets add a super cookie then delete it

>>> my_super_cookie = requests.cookies.create_cookie('super','cookie')>>> s.cookies.set_cookie(my_super_cookie)# Note we have both our previous cookie and our new cookie>>> s.cookies<RequestsCookieJar[Cookie(version=0, name='super', value='cookie', port=None, port_specified=False, domain='', domain_specified=False, domain_initial_dot=False, path='/', path_specified=True, secure=False, expires=None, discard=True, comment=None, comment_url=None, rest={'HttpOnly': None}, rfc2109=False), Cookie(version=0, name='COOKIE_NAME', value='the cookie works', port=None, port_specified=False, domain='www.domain.com', domain_specified=True, domain_initial_dot=False, path='/', path_specified=True, secure=False, expires=None, discard=True, comment=None, comment_url=None, rest={'HttpOnly': None}, rfc2109=False)]># Deleting is simple, note that this deletes the cookie based on the name,# if you have multiple cookies with the same name it will raise# requests.cookies.CookieConflictError>>> del s.cookies['super']>>> s.cookies<RequestsCookieJar[Cookie(version=0, name='COOKIE_NAME', value='the cookie works', port=None, port_specified=False, domain='www.domain.com', domain_specified=True, domain_initial_dot=False, path='/', path_specified=True, secure=False, expires=None, discard=True, comment=None, comment_url=None, rest={'HttpOnly': None}, rfc2109=False)]>

I found out a way to do it by importing CookieJar, Cookie, and cookies. With help from @Lukasa, he showed me a better way. However, with his way I was not able to specify the "port_specified", "domain_specified", "domain_initial_dot" or "path_specified" attributes. The "set" method does it automatically with default values. I'm trying to scrape a website and their cookie has different values in those attributes. As I am new to all of this I'm not sure if that really matters yet.

my_cookie = {"version":0,"name":'COOKIE_NAME',"value":'true',"port":None,# "port_specified":False,"domain":'www.mydomain.com',# "domain_specified":False,# "domain_initial_dot":False,"path":'/',# "path_specified":True,"secure":False,"expires":None,"discard":True,"comment":None,"comment_url":None,"rest":{},"rfc2109":False}s = requests.Session()s.cookies.set(**my_cookie)

If you're looking to handle a plain cookies str:

def make_cookiejar_dict(cookies_str):    # alt: `return dict(cookie.strip().split("=", maxsplit=1) for cookie in cookies_str.split(";"))`    cookiejar_dict = {}    for cookie_string in cookies_str.split(";"):        # maxsplit=1 because cookie value may have "="        cookie_key, cookie_value = cookie_string.strip().split("=", maxsplit=1)        cookiejar_dict[cookie_key] = cookie_value    return cookiejar_dictcookies_str = '''nopubuser_abo=1; groupenctype_abo="1="'''cj = requests.utils.cookiejar_from_dict(make_cookiejar_dict(cookies_str))sess = requests.Session()sess.cookies = cj