I want to have the same packages installed on the new version of Python (3.7.4) which I just installed as I do in my old version of Python (3.6.3) such as: Numpy, pandas, opencv, mathplotlib, etc, etc.
Is there an quick & easy way of doing this?
Can I just copy and paste the packages from python36/Lib/site-packages to python37/Lib/site-packages or do I have to use 'pip install' to do it manually for each package?
You can but they will not work. Especially packages such as numpy, pandas, matplotlib, opencv etc. They need to be compiled for a specific target. If you want the exact same packages in 3.7, pip freeze will list all installed packages. Store the output in a file and then use the pip in python 3.7 to install them pip3.7 install -r output_of_pip_freeze.txt