Python 練習関數

1.字符串首字母大寫，其餘小寫

	L1 = ['adam', 'LISA', 'barT']
	L2 = [s.capitalize() for s in L1]
	print(L2)

2.數組內值相乘

def prod(L):
	return reduce(lambda x,y:x*y, L)
print('3 * 5 * 7 * 9 =', prod([3, 5, 7, 9]))

3.返回函數計數器

def createCounter():
    def counter():
    	a = 0
    	while True:
    		a= a+1
    		yield a

    it = counter()
 
    def number():
        return next(it)
 
    return number

4.匿名函數

	L = list(filter(lambda x:x%2, range(1, 20)))
	print(L)