t=[1,3,4,5]                                                             
k=() 
for item in t: 
    k=k+(item,) 

>> t = (1, 2, [3, 4])
>>t[2].append(5)
>> t?
(1, 2, [3, 4, 5])

>>>type(t[0:2])
<class 'tuple'>
>>>type(l[0:3])
<class 'list'>

>>>t = (1, 2, 3)
>>>t[:]
(1, 2, 3)

>>>t[0] = 4
Traceback (most recent call last):
? File "<stdin>", line 1, in <module>
TypeError: 'tuple' object does not support item assignment

>>>l = [1, 2, 3]
>>>l[:]
[1, 2, 3]
>
>>>l[0] = 4
>

>>>t = (1, 2, 3, 3, 4)
>>>dir(t)
# 有意義的成員函數只有`count`、`index`
# count，記錄元組中某一元素出現的次數，index返回值所在的下標
>>>t.count(3)
2
>>>t.count(2)
1
>>>t.index(4)
4

>>>l=[1, 2, 3, 4]
dir(l)

>>>l = [1, 2, 3, 3, 4]
>>>tuple(l)
(1, 2, 3, 3, 4)
>>>t = (1, 2, 3, 3, 4)
>>>list(t)
[1, 2, 3, 3, 4]

>>>(l)
[1, 2, 3, 3, 4]
>>>[t] ? ? ? ? ? ? ? ? # 由元組組成的list
[(1, 2, 3, 3, 4)]