Is it possible without any plugins?
Or what's the best plugin for edit python file?
The way I do it is not specific to functions. It will just select a continuous block of Python code:
v]] if what you want to select is below the cursor
v[[ if it is above the cursor.
Just remove one bracket if the cursor is on the first line of the code block you want to select.
what's the fastest way to select a function of Python via VIM?