python中list怎么访问？

#!/usr/bin/python

list1 = ['physics', 'chemistry', 1997, 2000];

list2 = [1, 2, 3, 4, 5, 6, 7 ];

print "list1[0]: ", list1[0]

print "list2[1:5]: ", list2[1:5]

以上实例的输出结果：

list1[0]:  physics

list2[1:5]:  [2, 3, 4, 5]