??????????????

????????????????????????????????????????Python????????????顣??????????????.py???????????????????????????????????

??????????????

??8.3 ??δ?????????????

#!/usr/bin/python
# Filename: mymodule.py

def sayhi():
    print 'Hi, this is mymodule speaking.'

version = '0.1'

# End of mymodule.py

????????code/mymodule.py??

????????? ??? ???????????????????????????????Python???????????????????????????????????????????????Python??????????????顣

??????????????????????????????????????????У???????sys.path??????????

#!/usr/bin/python
# Filename: mymodule_demo.py

import mymodule

mymodule.sayhi()
print 'Version', mymodule.version

????????code/mymodule_demo.py??

???

$ python mymodule_demo.py
Hi, this is mymodule speaking.
Version 0.1

????ι???

????????????????????????????????Python????????????????????????????ЩPython??????????????????μ??????

from..import

????????????from..import????汾??

#!/usr/bin/python
# Filename: mymodule_demo2.py

from mymodule import sayhi, version
# Alternative:
# from mymodule import *

sayhi()
print 'Version', version

????????code/mymodule_demo2.py??

mymodule_demo2.py???????mymodule_demo.py????????