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

Example 1: ERROR: Could not find a version that satisfies the requirement cv2 (from versions: none) ERROR: No matching distribution found for cv2

#Know the reason is really dumb, because the reason is that the package of CV2 is not called cv2 but called opencv-python

pip install opencv-python

#For python3:
pip3 install opencv-python

Example 2: 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 3: pip install tensorflow no matching distribution found for tensorflow

this error will show only on python 3.9 if you use python 3.8 or before and after python 3.5 or something you wont get this error

Example 4: 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

Example 5: Could not find a version that satisfies the requirement tensorflow (from versions: none)

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

Example 6: ERROR: Could not find a version that satisfies the requirement tensorflow== ERROR: No matching distribution found for tensorflow==

# Check, if you are using 64 bit python, since it's required for tensorflow.
# If you are using 32 bit python first install a 64 bit version of python, before installing tensorflow.

# Check bit version:
# If you start python in your terminal, you can see the bit version in square brackets in the first line.
# E.g.: 
# C:\>python
# Python 3.x.x ... [MSC v.1928 64 bit (AMD64)] ...
# Type "help", "copyright", "credits" or "license" for more information.
# >>>