How do you specify request headers using pythob code example

Example 1: python requests header

url = 'https://api.github.com/some/endpoint'
headers = {'user-agent': 'my-app/0.0.1'}
r = requests.get(url, headers=headers)

Example 2: how do you set headers in python get requests

b'{\n  "cookies": {\n    "cookie1": "value1"\n  }\n}\n'