给定2个python脚本：first.py和second.py，从第二个脚本执行第一个脚本的通常方法是：
first.py：
def func1():
print 'inside func1 in first.py'
if __name__ == '__main__':
# first.py executed as a script
func1()
second.py：
import first
def second_func():
print 'inside second_func in second.py'
if __name__ == '__main__':
# second.py executed as a script
second_func()
first.func1() # executing a function from first.py
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