python中求列表元素的最大值和最小值

1、

>>> a = [34,28,187,22,128]
>>> max = a[0]
>>> for i in a:   ## 求最大值
    if i > max:
        max = i

        
>>> print(max)
187
>>> min = a[0]
>>> for i in a:    ## 求最小值
    if i < min:
        min = i

        
>>> print(min)
22