pip3 install tensorflow.examples

Example 1: update tensorflow pip

######## for Python 2.7
pip install --upgrade pip
pip install --upgrade tensorflow

######## for Python 3.n
pip3 install --upgrade pip
pip3 install --upgrade tensorflow

Example 2: install tensorflow for python 3.9.1

python -m pip install --upgrade https://storage.googleapis.com/tensorflow/mac/cpu/tensorflow-1.12.0-py3-none-any.whl

Example 3: how to install tensorflow

sudo apt tensorflow