Python__模块
什么是模块：sys、time等模块，已经被封装起来，我们经常在用。每个Python模块都有它的__name__
#!/usr/bin/python
if __name__ == '__main__':
print 'This program is being run by itself'
else:
print 'I am being imported from another module'
This program is being run by itself
说明运行着的模块名为'__main__'，也就是C语言中的main()
定义模块
#!/usr/bin/python
# Filename: mymodule.py
def sayHi():
print 'Hi'
def sayHello():
print 'Hello'
version = '0.1'
# End of mymodule.py
使用模块，导入全部
#!/usr/bin/python
import mymodule
mymodule.sayHi()
mymodule.sayHello()
print 'Version', mymodule.version
导入模块的指定部分
#!/usr/bin/python
from mymodule import sayHi, version
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