1. 导入包的问题

1.import导入包的路径

In [4]: import sys
In [5]: sys.path
Out[5]: 
['',
 '/usr/bin',
 '/usr/lib/python35.zip',
 '/usr/lib/python3.5',
 '/usr/lib/python3.5/plat-x86_64-linux-gnu',
 '/usr/lib/python3.5/lib-dynload',
 '/usr/local/lib/python3.5/dist-packages',
 '/usr/lib/python3/dist-packages',
 '/usr/lib/python3/dist-packages/IPython/extensions',
 '/home/python/.ipython']

### 添加路径
In [6]: sys.path.append('/home')

In [7]: sys.path
Out[7]: 
['',
 '/usr/bin',
 '/usr/lib/python35.zip',
 '/usr/lib/python3.5',
 '/usr/lib/python3.5/plat-x86_64-linux-gnu',
 '/usr/lib/python3.5/lib-dynload',
 '/usr/local/lib/python3.5/dist-packages',
 '/usr/lib/python3/dist-packages',
 '/usr/lib/python3/dist-packages/IPython/extensions',
 '/home/python/.ipython',
 '/home']

2.reload重新导入模块

In [1]: import test1

In [2]: test1.test1()
----1--


In [3]: from imp import *   #reload在imp包内

In [4]: reload(test1)
Out[4]: <module 'test1' from '/home/python/02-就业班/01-python高级-1/test1.py'>

In [5]: test1.test1()
----1--
----2--

3.模块循环导入

## 模块a，b互相调用
### cat a.py 
from b import b1

def a1():
    print('----a1')
    b1()

a1()


### b.py 
from a import a1

def b1():
    print('---b1')
    a1()

b1()