使用 reduce
def multiply(s1, s2):
print('{arg1} * {arg2} = {res}'.format(arg1=s1,
arg2=s2,
res=s1*s2))
return s1 * s2
asequence = [1, 2, 3]
給定 initializer
,通過將函式應用於初始化器和第一個可迭代元素來啟動該函式:
cumprod = reduce(multiply, asequence, 5)
# Out: 5 * 1 = 5
# 5 * 2 = 10
# 10 * 3 = 30
print(cumprod)
# Out: 30
沒有 initializer
引數,reduce
首先將函式應用於前兩個列表元素:
cumprod = reduce(multiply, asequence)
# Out: 1 * 2 = 2
# 2 * 3 = 6
print(cumprod)
# Out: 6