原因分析

• 这个错误出现是因为执行元组之间的合并
• 例子

tuple1 = ("str",1,["a","b","c"],4)
tuple2 = ("hello",)
print(tuple1[0])
print (tuple1[1:3])
print (tuple1[1:])
print (tuple2 * 2)
print (tuple1+tuple2)

• 注意事项，tuple2 的后面有一个逗号
• 执行结果如下

str
(1, ['a', 'b', 'c'])
(1, ['a', 'b', 'c'], 4)
('hello', 'hello')
('str', 1, ['a', 'b', 'c'], 4, 'hello')

• 如果是列表则无需逗号

list_a = ["str",1,["a","b","c"],4]
list_b = ["hello"]
print (list_a[0])
print (list_a[1:3])
print (list_a[1:])
print (list_b * 2)
print (list_a + list_b)//str
//[1, ['a', 'b', 'c']]
//[1, ['a', 'b', 'c'], 4]
//['hello', 'hello']
//['str', 1, ['a', 'b', 'c'], 4, 'hello']