# Copyright 2018 Google LLC

#

# Licensed under the Apache License, Version 2.0 (the "License");

# you may not use this file except in compliance with the License.

# You may obtain a copy of the License at

#

# http://www.apache.org/licenses/LICENSE-2.0

#

# Unless required by applicable law or agreed to in writing, software

# distributed under the License is distributed on an "AS IS" BASIS,

# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

# See the License for the specific language governing permissions and

# limitations under the License.

# [START slides_quickstart]

import os.path

from google.auth.transport.requests import Request

from google.oauth2.credentials import Credentials

from google_auth_oauthlib.flow import InstalledAppFlow

from googleapiclient.discovery import build

from googleapiclient.errors import HttpError

# If modifying these scopes, delete the file token.json.

SCOPES = ["https://www.googleapis.com/auth/presentations.readonly"]

# The ID of a sample presentation.

PRESENTATION_ID = "1EAYk18WDjIG-zp_0vLm3CsfQh_i8eXc67Jo2O9C6Vuc"

def main():

"""Shows basic usage of the Slides API.

Prints the number of slides and elements in a sample presentation.

"""

creds = None

# The file token.json stores the user's access and refresh tokens, and is

# created automatically when the authorization flow completes for the first

# time.

if os.path.exists("token.json"):

creds = Credentials.from_authorized_user_file("token.json", SCOPES)

# If there are no (valid) credentials available, let the user log in.

if not creds or not creds.valid:

if creds and creds.expired and creds.refresh_token:

creds.refresh(Request())

else:

flow = InstalledAppFlow.from_client_secrets_file(

"credentials.json", SCOPES

)

creds = flow.run_local_server(port=0)

# Save the credentials for the next run

with open("token.json", "w") as token:

token.write(creds.to_json())

try:

service = build("slides", "v1", credentials=creds)

# Call the Slides API

presentation = (

service.presentations().get(presentationId=PRESENTATION_ID).execute()

)

slides = presentation.get("slides")

print(f"The presentation contains {len(slides)} slides:")

for i, slide in enumerate(slides):

print(

f"- Slide #{i + 1} contains"

f" {len(slide.get('pageElements'))} elements."

)

except HttpError as err:

print(err)

if __name__ == "__main__":

main()

# [END slides_quickstart]