My elpy package tells me that it can not find the command "flake8" on a Windows 10 machine.
Ok, it make a bit sense to me. By default there is no flake8 on Windows 10 installed. I was not aware that elpy uses extern commands for syntax checkig of pyton code.
However "flake8" was not automaticly installed by using melpas elpy package. What is the appropriate way to "install" flake8 on a Windows 10? There is no "flake8" on melpa.