import requests
url = 'https://w3schools.com/python/demopage2.php'
myobj = {'somekey': 'somevalue'}
#use the 'cookies' parameter to send cookies to the server:
x = requests.post(url, data = myobj, cookies = {"favcolor": "Red"})
print(x.text)
#the 'demopage2.php' prints the value of the 'favcolor' cookie.