requests.get() creates a GET request:
response = requests.get('https://example.com/')
Pass in query parameters as a dictionary to the params argument:
response = requests.get('https://example.com/', params={"a": 1, "b": 2})
For GET requests that might require basic authentication, you can include the auth paramter as follows:
response = requests.get('https://api.github.com/user', auth=('user', 'pass'))