Use the python zimports package to sort your python imports.
zimports is available via melpa. Make
sure the python zimports
executable is on PATH.
Call zimports-buffer to sort imports in the current python buffer.
Enable zimports-mode to sort imports every time you save the buffer.
You can turn on zimports-mode by creating a .dir-locals.el file
with the following contents:
((python-mode . ((mode . zimports))))