#!/usr/bin/env python
# coding: utf-8

# In[4]:


from IPython import get_ipython


def decorate_cell(line, cell):
    print("before")
    get_ipython().run_cell(cell)
    print("after")

get_ipython().register_magic_function(decorate_cell, "cell")


# In[5]:


get_ipython().run_cell_magic('decorate_cell', '', 'x = 5\n')


# In[6]:


print(x)