__init__.py一般是为空,用在一个python目录中,标识该目录是一个python的模块包

  先上来看一个例子:

 .:
test1 test2 test_init.py ./test1:
time.py ./test2:
cpuinfo.py cpuinfo.pyc __init__.py __init__.pyc

  test_init.py里面的代码如下:

  1 from test2 import cpuinfo
2 from test1 import time
3

  time.py里面:

  1 import time
2 print time.strftime('%Y.%m.%d',time.localtime(time.time()))

  cpuinfo.py里面:

import platform

os = platform.system()
print os print platform.platform()
print platform.version()

  执行结果:

  

Linux
Linux-4.15.0-041500-generic-x86_64-with-Ubuntu-16.04-xenial
#201802011154 SMP Thu Feb 1 11:55:45 UTC 2018
Traceback (most recent call last):
File "test_init.py", line 2, in <module>
from test1 import time
ImportError: No module named test1

  假如把time.py改成:并在其平行的目录下面加上__init__.py,即可得出:

#import time
#print time.time()
#print time.strftime('%Y.%m.%d',time.localtime(time.time())) print "hello world"

  下面的结果:

  

Linux
Linux-4.15.0-041500-generic-x86_64-with-Ubuntu-16.04-xenial
#201802011154 SMP Thu Feb 1 11:55:45 UTC 2018
hello world
05-11 04:50
查看更多