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En las guías de inicio rápido, se explica cómo configurar y ejecutar una app que llama a una API de Google Workspace. En esta guía de inicio rápido, se usa un enfoque de autenticación simplificado que es adecuado para un entorno de pruebas. Para un entorno de producción, te recomendamos que obtengas información sobre la autenticación y la autorización antes de elegir las credenciales de acceso adecuadas para tu app.
Crea una aplicación de línea de comandos en Python que realice solicitudes a la API de Drive Labels.
Autoriza credenciales para una aplicación de escritorio
Para autenticar a los usuarios finales y acceder a los datos del usuario en tu app, debes crear uno o más IDs de cliente de OAuth 2.0. Un ID de cliente se usa con el fin de identificar una sola app para los servidores de OAuth de Google. Si tu app se ejecuta en varias plataformas, debes crear un ID de cliente independiente para cada una.
En la consola de Google Cloud, ve a Menú menu>Google Auth platform>Clientes.
Para ver otras opciones de instalación, consulta la sección de instalación de la biblioteca de Python.
Configura la muestra
En tu directorio de trabajo, crea un archivo llamado quickstart.py.
Incluye el siguiente código en quickstart.py:
importos.pathfromgoogle.auth.transport.requestsimportRequestfromgoogle.oauth2.credentialsimportCredentialsfromgoogle_auth_oauthlib.flowimportInstalledAppFlowfromgoogleapiclient.discoveryimportbuildfromgoogleapiclient.errorsimportHttpError# If modifying these scopes, delete the file token.json.SCOPES=['https://www.googleapis.com/auth/drive.labels.readonly']defmain():"""Shows basic usage of the Drive Labels API. Prints the first page of the customer's Labels. """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.ifos.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.ifnotcredsornotcreds.valid:ifcredsandcreds.expiredandcreds.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 runwithopen('token.json','w')astoken:token.write(creds.to_json())try:service=build('drivelabels','v2',credentials=creds)response=service.labels().list(view='LABEL_VIEW_FULL').execute()labels=response['labels']ifnotlabels:print('No Labels')else:forlabelinlabels:name=label['name']title=label['properties']['title']print(u'{0}:\t{1}'.format(name,title))exceptHttpErroraserror:# TODO (developer) - Handle errors from Labels API.print(f'An error occurred: {error}')if__name__=='__main__':main()
Ejecuta la muestra
En tu directorio de trabajo, compila y ejecuta la muestra:
pythonquickstart.py
La primera vez que ejecutes la muestra, se te solicitará que autorices el acceso:
Si aún no accediste a tu Cuenta de Google, se te solicitará que lo hagas. Si accediste a varias cuentas, selecciona una para usarla en la autorización.
Haz clic en Aceptar.
La información de autorización se almacena en el sistema de archivos, por lo que la próxima vez que ejecutes el código de muestra, no se te solicitará la autorización.
Creaste correctamente tu primera aplicación en Python que realiza solicitudes a la API de Drive Labels.
[[["Fácil de comprender","easyToUnderstand","thumb-up"],["Resolvió mi problema","solvedMyProblem","thumb-up"],["Otro","otherUp","thumb-up"]],[["Falta la información que necesito","missingTheInformationINeed","thumb-down"],["Muy complicado o demasiados pasos","tooComplicatedTooManySteps","thumb-down"],["Desactualizado","outOfDate","thumb-down"],["Problema de traducción","translationIssue","thumb-down"],["Problema con las muestras o los códigos","samplesCodeIssue","thumb-down"],["Otro","otherDown","thumb-down"]],["Última actualización: 2025-08-29 (UTC)"],[],[],null,["Quickstarts explain how to set up and run an app that calls a\nGoogle Workspace API. This quickstart uses a\nsimplified authentication approach that is appropriate for a testing\nenvironment. For a production environment, we recommend learning about\n[authentication and authorization](/workspace/guides/auth-overview)\nbefore\n[choosing the access credentials](/workspace/guides/create-credentials#choose_the_access_credential_that_is_right_for_you)\nthat are appropriate for your app.\n\nCreate a Python command-line application that makes requests to the\nDrive Labels API.\n\nObjectives\n\n- Set up your environment.\n- Install the client library.\n- Set up the sample.\n- Run the sample.\n\nPrerequisites\n\n- Python 2.6 or greater\n- The [pip](https://pypi.python.org/pypi/pip) package management tool\n- [A Google Cloud project](/workspace/guides/create-project).\n\n\u003c!-- --\u003e\n\n- A Google Account.\n\nSet up your environment\n\nTo complete this quickstart, set up your environment.\n\nEnable the API Before using Google APIs, you need to turn them on in a Google Cloud project. You can turn on one or more APIs in a single Google Cloud project.\n\n- In the Google Cloud console, enable the Drive Labels API.\n\n [Enable the API](https://console.cloud.google.com/flows/enableapi?apiid=drivelabels.googleapis.com)\n\nAuthorize credentials for a desktop application To authenticate end users and access user data in your app, you need to create one or more OAuth 2.0 Client IDs. A client ID is used to identify a single app to Google's OAuth servers. If your app runs on multiple platforms, you must create a separate client ID for each platform.\n\n1. In the Google Cloud console, go to Menu menu \\\u003e **Google Auth platform** \\\u003e **Clients** .\n\n [Go to Clients](https://console.cloud.google.com/auth/clients)\n2. Click **Create Client**.\n3. Click **Application type** \\\u003e **Desktop app**.\n4. In the **Name** field, type a name for the credential. This name is only shown in the Google Cloud console.\n5. Click **Create** .\n\n\n The newly created credential appears under \"OAuth 2.0 Client IDs.\"\n6. Save the downloaded JSON file as `credentials.json`, and move the file to your working directory.\n\nInstall the Google client library\n\n- Install the Google client library for Python:\n\n pip install --upgrade google-api-python-client google-auth-httplib2 google-auth-oauthlib\n\nFor alternate installation options, refer to the Python library's\n[Installation section](/api-client-library/python/start/installation#installation).\n\nConfigure the sample\n\n1. In your working directory, create a file named `quickstart.py`.\n2. Include the following code in `quickstart.py`:\n\n import os.path\n\n from google.auth.transport.requests import Request\n from google.oauth2.credentials import Credentials\n from google_auth_oauthlib.flow import InstalledAppFlow\n from googleapiclient.discovery import build\n from googleapiclient.errors import HttpError\n\n # If modifying these scopes, delete the file token.json.\n SCOPES = ['https://www.googleapis.com/auth/drive.labels.readonly']\n\n def main():\n \"\"\"Shows basic usage of the Drive Labels API.\n\n Prints the first page of the customer's Labels.\n \"\"\"\n creds = None\n # The file token.json stores the user's access and refresh tokens, and is\n # created automatically when the authorization flow completes for the first\n # time.\n if os.path.exists('token.json'):\n creds = Credentials.from_authorized_user_file('token.json', SCOPES)\n # If there are no (valid) credentials available, let the user log in.\n if not creds or not creds.valid:\n if creds and creds.expired and creds.refresh_token:\n creds.refresh(Request())\n else:\n flow = InstalledAppFlow.from_client_secrets_file('credentials.json',\n SCOPES)\n creds = flow.run_local_server(port=0)\n # Save the credentials for the next run\n with open('token.json', 'w') as token:\n token.write(creds.to_json())\n try:\n service = build('drivelabels', 'v2', credentials=creds)\n response = service.labels().list(\n view='LABEL_VIEW_FULL').execute()\n labels = response['labels']\n\n if not labels:\n print('No Labels')\n else:\n for label in labels:\n name = label['name']\n title = label['properties']['title']\n print(u'{0}:\\t{1}'.format(name, title))\n except HttpError as error:\n # TODO (developer) - Handle errors from Labels API.\n print(f'An error occurred: {error}')\n\n if __name__ == '__main__':\n main()\n\nRun the sample\n\n1. In your working directory, build and run the sample:\n\n python quickstart.py\n\n2. The first time you run the sample, it prompts you to authorize access:\n\n 1. If you're not already signed in to your Google Account, you're prompted to sign in. If you're signed in to multiple accounts, select one account to use for authorization.\n 2. Click **Accept**.\n\n Authorization information is stored in the file system, so the next time you\n run the sample code, you aren't prompted for authorization.\n\nYou have successfully created your first Python application that makes requests to\nthe Drive Labels API.\n\nNext steps\n\n- [Troubleshoot authentication and authorization issues](/workspace/drive/labels/troubleshoot-authentication-authorization)\n- [Google APIs Client for Python documentation](/api-client-library/python)"]]