测试列表冒号用法

#-------------------------------------------------------------------------------
# 测试列表冒号用法
#-------------------------------------------------------------------------------

def main():
    ls = [0,1,2,3,4,5,6,7,8,9]

    print('ls      is:',ls)
    print('ls[2::] is:',ls[2::])
    print('ls[2:-1]is:',ls[2:-1])
    print('ls[2:9] is:',ls[2:9])
    print('ls[::3] is:',ls[::3])
    print('ls[:] is', ls[:])

if __name__ == '__main__':
    main()

测试1：

>>> 
ls      is: [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]
ls[2::] is: [2, 3, 4, 5, 6, 7, 8, 9]
ls[2:-1]is: [2, 3, 4, 5, 6, 7, 8]
ls[2:9] is: [2, 3, 4, 5, 6, 7, 8]
ls[::3] is: [0, 3, 6, 9]
ls[:] is [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]
>>>