Use 2020-resolver with pip.

PiperOrigin-RevId: 326665731

Author: Vighnesh Birodkar

research/object_detection/g3doc/tf1.md

@@ -35,7 +35,7 @@ cd models/research
 protoc object_detection/protos/*.proto --python_out=.
 # Install TensorFlow Object Detection API.
 cp object_detection/packages/tf1/setup.py .
-python -m pip install .
+python -m pip install --use-feature=2020-resolver .
 ```
 
 ```bash

research/object_detection/g3doc/tf2.md

@@ -35,7 +35,7 @@ cd models/research
 protoc object_detection/protos/*.proto --python_out=.
 # Install TensorFlow Object Detection API.
 cp object_detection/packages/tf2/setup.py .
-python -m pip install .
+python -m pip install --use-feature=2020-resolver .
 ```
 
 ```bash
@@ -81,4 +81,4 @@ We provide a large collection of models that are trained on COCO 2017 in the
 *   <a href='tpu_compatibility.md'>
       TPU compatible detection pipelines</a><br>
 *   <a href='tf2_training_and_evaluation.md'>
-      Training and evaluation guide (CPU, GPU, or TPU)</a><br>
+      Training and evaluation guide (CPU, GPU, or TPU)</a><br>

research/object_detection/packages/tf2/setup.py

@@ -7,9 +7,8 @@
 # tf-models-offical requirements. These packages request for incompatible
 # oauth2client package.
 REQUIRED_PACKAGES = [
-    'tensorflow-metadata<0.23.0',  # TODO(b/164107742)
     # Required for apache-beam with PY3
-    'avro-python3==1.8.1',
+    'avro-python3',
     'apache-beam',
     'pillow',
     'lxml',
@@ -21,8 +20,7 @@
     'pycocotools',
     'scipy',
     'pandas',
-    # Required to avoid Numpy 1.19.1 conflict with TF 2.3
-    'tf-models-official==2.2.2'
+    'tf-models-official'
 ]
 
 setup(