Migrate to Python Client Library v0.25.1

Guide for migrating to the Cloud Vision Python Client Library v0.25.1.

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For detailed documentation that includes this code sample, see the following:

Before trying this sample, follow the Python setup instructions in the Vision quickstart using client libraries. For more information, see the Vision Python API reference documentation.

To authenticate to Vision, set up Application Default Credentials. For more information, see Set up authentication for a local development environment.

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client = vision.ImageAnnotatorClient()

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