This issue is for a:

- [x] bug report 
- [ ] feature request
- [ ] documentation issue or request
- [ ] regression (a behavior that used to work and stopped in a new release)

Minimal steps to reproduce

Try to execute https://github.com/Azure-Samples/cognitive-services-content-moderator-samples/blob/master/documentation-samples/python/text-moderation-quickstart-python.py using a Content Moderator resource deployed in Azure.

Any log messages given by the failure

The call to client.text_moderation.screen_text in the example fails with

AttributeError: 'str' object has no attribute 'read'

Expected/desired behavior

The call should complete without errors.

OS and Version?

> uname -a
Linux mybox 4.15.0-1041-azure #45-Ubuntu SMP Fri Mar 15 14:41:00 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux

Versions

azure.cognitiveservices.vision.contentmoderator.version == 1.0.0

Mention any other details that might be useful

The code can be fixed by wrapping the TEXT string in a file-like object as in

import io
screen = client.text_moderation.screen_text(
    text_content=io.StringIO(TEXT),
    language="eng",
    text_content_type="text/plain",
    autocorrect=True,
    pii=True,
    classify=True
)

I am happy to file a PR on this. However, I am not sure about what is the relationship of this repository with https://github.com/Azure-Samples/cognitive-services-python-sdk-samples/blob/master/samples/vision/content_moderator_text_moderation_samples.py (which may have Python examples in better/up-to-date shape).
This failure trickles in the Quickstart documentation too: https://docs.microsoft.com/en-us/azure/cognitive-services/content-moderator/text-moderation-quickstart-python shouldn't work without modifications.