ERROR: Could not find a version that satisfies the requirement tensorflow==1.13.1 (from -r requirements.txt (line 25)) (from versions: none) ERROR: No matching distribution found for tensorflow==1.13.1 (from -r requirements.txt (line 25)) code example

Example 1: ERROR: Could not find a version that satisfies the requirement tensorflow (from versions: none) ERROR: No matching distribution found for tensorflow

in the terminal paste this
this will surely work

pip3 install --upgrade https://storage.googleapis.com/tensorflow/mac/cpu/tensorflow-1.0.0-py3-none-any.whl

Example 2: ERROR: Could not find a version that satisfies the requirement tensorflow ERROR: No matching distribution found for tensorflow

Use this:
pip3 install --upgrade https://storage.googleapis.com/tensorflow/mac/cpu/tensorflow-1.0.0-py3-none-any.whl