main.py

from apiclient import discovery
from httplib2 import Http
from oauth2client import client, file, tools
import json

SCOPES = "https://www.googleapis.com/auth/forms.responses.readonly"
DISCOVERY_DOC = "https://forms.googleapis.com/$discovery/rest?version=v1"

store = file.Storage("token.json")
creds = None
if not creds or creds.invalid:
  flow = client.flow_from_clientsecrets("credentials.json", SCOPES)
  creds = tools.run_flow(flow, store)
service = discovery.build(
    "forms",
    "v1",
    http=creds.authorize(Http()),
    discoveryServiceUrl=DISCOVERY_DOC,
    static_discovery=False,
)

# Prints the responses of your specified form:
form_id = "<FORM_UID>"
# get meta data of form (make sure the scopes are defined above)
# result = service.forms().get(formId=form_id).execute()
# get all responses of form
result = service.forms().responses().list(formId=form_id).execute()
# get a single response of form (make sure the scopes are defined above)
# response_id = "<_RESPONSE_ID>"
# result = (
#     service.forms()
#     .responses()
#     .get(formId=form_id, responseId=response_id)
#     .execute()
# )

with open('data.json', 'w') as f:
    json.dump(result, f)