python中reload重载实例用法

from imp import reload reload(MyModule)

# i am test.py
num = 1

>>> import test
>>> test.num
1

# i am test.py
num = 2

>>> from importlib import reload
>>> reload(test)

>>> test.num
2

>>> import os
>>> os.getcwd()
'C:\\CodingApp\\python'
>>> os.chdir(r'C:\Users\JIANCHEN\PycharmProjects\决策树\src')
>>> os.getcwd()
'C:\\Users\\JIANCHEN\\PycharmProjects\\决策树\\src'
>>> from imp import reload

Warning (from warnings module):
 File "__main__", line 1
DeprecationWarning: the imp module is deprecated in favour of importlib; see the module's documentation for alternative uses
>>> reload(index)
Traceback (most recent call last):
 File "", line 1, in 
  reload(index)
NameError: name 'index' is not defined
>>> import index
>>> reload(index)