Start / stop GCE from python

google-api-python-client==1.7.9 
oauth2client==4.1.3

import time

from googleapiclient.discovery import build, Resource
from oauth2client.client import GoogleCredentials


def start(project, zone, instance_name):
    credentials: GoogleCredentials = GoogleCredentials.get_application_default()
    compute: Resource = build('compute', 'v1', credentials=credentials)
    instance: dict = compute.instances().get(project=project, zone=zone, instance=instance_name).execute()
    result: dict = compute.instances().start(project=project, zone=zone, instance=instance['name']).execute()
    # Wait Running
    while True:
        instance: dict = compute.instances().get(project=project, zone=zone, instance=instance_name).execute()
        print(instance["status"])
        # TERMINATED -> STAGING -> RUNNING
        if instance["status"] == "RUNNING":
            break
        time.sleep(5)


def stop(project, zone, instance_name):
    credentials: GoogleCredentials = GoogleCredentials.get_application_default()
    compute: Resource = build('compute', 'v1', credentials=credentials)
    instance: dict = compute.instances().get(project=project, zone=zone, instance=instance_name).execute()
    result: dict = compute.instances().stop(project=project, zone=zone, instance=instance['name']).execute()
    # Wait Terminated
    while True:
        instance: dict = compute.instances().get(project=project, zone=zone, instance=instance_name).execute()
        print(instance["status"])
        #  RUNNING -> STOPPING -> TERMINATED
        if instance["status"] == "TERMINATED":
            break
        time.sleep(5)


if __name__ == "__main__":
    project = 'xxx'
    zone = 'yyy'
    instance_name = "zzz"
    start(project, zone, instance_name)
    stop(project, zone, instance_name)

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