list_tuple

l = [1,2,"hello","world"]
tup = ("jody",32)
print(l)

[1, 2, 'hello', 'world']

print(tup)

('jody', 32)

l = [1,2,3,4]

l[3] = 40

print(l)

[1, 2, 3, 40]

tup = (1,2,3,4)

print(tup)

(1, 2, 3, 4)

# add elements
new_tup = tup+(5,)
print(new_tup)

(1, 2, 3, 4, 5)

l.append(5)
print(l)

[1, 2, 3, 40, 5]

l = []
l.append('hello')
# 片切操作
l = [1,2,3,4]
print(l[1:3])
tup = (1,2,3,4)
print(tup[1:3])

[2, 3]
(2, 3)

#嵌套
l = [[1,2,3],[4,5]]
tup = ((1,2,3),(4,5,6))
print(l)
print(tup)

[[1, 2, 3], [4, 5]]
((1, 2, 3), (4, 5, 6))

# 相互转换
print(list((1,2,3)))
print(tuple([1,2,3]))

[1, 2, 3]
(1, 2, 3)

#内置函数
l = [3,2,3,7,8,1]
#统计3的数量
print(l.count(3))

2

#找到7的下标
print(l.index(7))

3

# 反转list
l.reverse()
print(l)

[3, 2, 3, 7, 8, 1]

#排序（ASC）
l.sort()
print(l)

[1, 2, 3, 3, 7, 8]

tup = (3,2,3,7,8,1)
print(tup.count(3))

2

print(tup.index(7))

3

print(list(tup))
print(list(reversed(tup)))

[3, 2, 3, 7, 8, 1]
[1, 8, 7, 3, 2, 3]

print(sorted(tup))

[1, 2, 3, 3, 7, 8]

print(sorted(l))

[1, 2, 3, 3, 7, 8]

# print(tup.sort()) wrong code

---------------------------------------------------------------------------

AttributeError Traceback (most recent call last)

in
----> 1 print(tup.sort())

AttributeError: 'tuple' object has no attribute 'sort'

# 列表和元组的存储差异
l = [1,2,3]
tup = (1,2,3)
print(l.__sizeof__())

64

print(tup.__sizeof__())

48

l = []
print(l.__sizeof__())

40

l.append(1)
print(l)
print(l.__sizeof__())

[1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
240

l.append(2)
print(l.__sizeof__())

240

l.append(3)
print(l.__sizeof__())

240

l.append(4)
print(l.__sizeof__())

240

l.append(5)
print(l.__sizeof__())

240

l.append(6)
print(l.__sizeof__())

240

l.append(7)
print(l.__sizeof__())

240

l.append(8)
print(l.__sizeof__())

240

l.append(9)
print(l.__sizeof__())

240

l.append(10)
print(l.__sizeof__())

320