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PiperOrigin-RevId: 272934570

PiperOrigin-RevId: 269884242

Refactor basic utils to modeling/

PiperOrigin-RevId: 269600561

PiperOrigin-RevId: 264977714

PiperOrigin-RevId: 264911876

PiperOrigin-RevId: 264193390

* Merged commit includes the following changes:
255493073  by hongkuny<hongkuny@google.com>:

    BERT initial OSS readme update.

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255470372  by dmchen<dmchen@google.com>:

    Slightly expand expected range for F1 score in BERT SQuAD accuracy test

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255109240  by hongkuny<hongkuny@google.com>:

    Update eval/predict batch sizes.

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255010016  by hongkuny<hongkuny@google.com>:

    Internal

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254874613  by hongkuny<hongkuny@google.com>:

    Update glue tasks enum to match directory name

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254866171  by taylorrobie<taylorrobie@google.com>:

    Internal change

254785517  by zongweiz<zongweiz@google.com>:

    Use train_single_step for BERT GPU models to temporarily work around some performance bugs in GPU runs

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254497647  by hongkuny<hongkuny@google.com>:

    Fix device placement for TPU export model.

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PiperOrigin-RevId: 255493073

* Update README.md

* Update README.md

1. Clarify instructions to avoid friction. https://github.com/tensorflow/tensorflow/issues/24136
2. If trying to run in Colab experienced issue entering Python path. https://medium.com/@cwcgchello/how-to-set-pythonpath-in-colab-bf8c239c7c29

* Update README.md

General guidelines for Google Python Style Guide links to a deprecated style guide from google

* Add checklist for official models. Remove file access from flag validator (causing issues with BUILD)

* spelling

* address PR comments

* Add boosted_trees to the official models

* Comments addressed from review, and a test added; using absl.flags instead of argparser.

* Used help_wrap. Also added instructions for inference.

* add requirements.txt now that there are dependencies beyond tensorflow

* direct pip info to README

* Adding logging utils

* restore utils

* delete old file

* update inputs and docstrings

* make /official a python module

* remove /utils directory

* Update readme for python path setting

* Change readme texts

* Update readme

* Respond to CR