回调函数 demo

callback1.py

#coding=utf-8

def double(x):
	return x*2

def getoddnum(k, getEvenNumber):
	return 1 + getEvenNumber(k)

def main():
	k = 1
	i = getoddnum(k, double) # 2k+1
	print (i)

if __name__ == '__main__':
	main()