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

# # Варианты иморта модулей

# In[1]:


g1 = set(globals().keys())
import contextlib
g2 = set(globals().keys())
g2.difference(g1)


# In[2]:


contextlib.contextmanager


# In[3]:


import numpy as np
g3 = set(globals().keys())
g3.difference(g2)


# In[4]:


from contextlib import closing
g4 = set(globals().keys())
g4.difference(g3)


# In[5]:


from contextlib import *
g5 = set(globals().keys())
g5.difference(g4)


# In[6]:


from socket import *
g6 = set(globals().keys())
g6.difference(g5)


# # Процесс импорта

# In[1]:


import sys
sys.modules


# In[2]:


sys.meta_path


# In[3]:


sys.path


# In[4]:


get_ipython().system("PYTHONPATH=/asdf python3.4 -c 'import sys; print(sys.path)'")


# # Создание модулей

# In[1]:


get_ipython().run_cell_magic('writefile', 'module.py', "\ndef f():\n    pass\n\nclass C:\n    pass\n\nx = 1\n\nprint('hello from module.py')\n")


# In[2]:


import module


# In[3]:


dir(module)


# In[4]:


get_ipython().run_cell_magic('writefile', 'module.py', "\ndef f():\n    pass\n\nclass C:\n    pass\n\nx = 1\n\nif __name__ == '__main__':\n    print('hello from main')\nelse:\n    print('hello from module.py')\n")


# In[1]:


get_ipython().system('python3.4 module.py')


# In[2]:


import module


# # Пакеты

# In[1]:


get_ipython().system('mkdir package')


# In[2]:


get_ipython().run_cell_magic('writefile', 'package/__init__.py', "\nprint('hello from package')\n")


# In[3]:


get_ipython().run_cell_magic('writefile', 'package/a.py', "\nprint('hello from a')\n")


# In[4]:


get_ipython().run_cell_magic('writefile', 'package/b.py', "\nprint('hello from b')\n")


# In[5]:


import package.a


# In[6]:


import package.b


# In[7]:


from package import a
a


# In[8]:


from package import *
b


# In[1]:


get_ipython().run_cell_magic('writefile', 'package/__init__.py', "\n__all__ = ['b']\nprint('hello from package')\n")


# In[2]:


from package import *


# In[3]:


b


# In[4]:


a