python怎么查看列表长度？

#!/usr/bin/python

list1, list2 = [123, 'xyz', 'zara'], [456, 'abc']

print "First list length : ", len(list1);

print "Second list length : ", len(list2);

First list length :  3

Second lsit length :  2

from operator import length_hint

# 初始化列表

List = [ 1, 4, 5, 7, 8 ]

# 输出列表

print ("列表为： " + str(List))

list_len_hint =length_hint(List)

# 输出列表长度

print ("列表长度为： " + str(list_len_hint))