Unable to install the dependencies with Python 3.8.3 and pip-20.1.1

[imtiaz2564]

ERROR: Could not find a version that satisfies the requirement opencv_python==3.4.5.20 (from versions: 3.4.8.29, 3.4.9.31, 3.4.9.33, 4.1.2.30, 4.2.0.32, 4.2.0.34)
ERROR: No matching distribution found for opencv_python==3.4.5.20

[b4017816]

same here, will update with a workaround

[NoteToSelfFindGoodNickname]

Same here. What is the workaround, please?

[deivid11]

Use an older python version. I'm using python 2.7.

python2.7 -m pip install -r requirements.txt