How to reload python modules on python-shell-send-buffer in Emacs?

Question

When I use python-shell-send-buffer (Cc Cc) I can see changes from my main buffer in python shell.

But if my buffer has imported modules they are not reloaded. How can it be fixed?

For exmple:
main.py:

from functions import foo
print 'a'

functions.py:

def foo():
    print 'bcdef'

So if I change foo() and run python-shell-send-buffer on main.py - it gives me the same foo() it read 1st time

a
bcdef   # never changed

Answer 1

If you want to do this - use ipython.

Create configuration "dev" (or whatever):

ipython profile create dev
[ProfileCreate] Generating default config file: u'/home/username/.config/ipython/profile_dev/ipython_config.py'

And add these lines to "ipython_config.py":

c.InteractiveShellApp.extensions = ['autoreload']
c.InteractiveShellApp.exec_lines = ['%autoreload 2']

Then set variables in Emacs config for python-mode:

(setq
   python-shell-interpreter "ipython"
   python-shell-interpreter-args "--profile=dev"
)

IPython started with this config will reload modules when you resend code to it.