a="asdfghjkl;'iuygb"

b="小米"

c=['a','b','c']

d= {'name':1,'age':24}

>>> print(len(a))

>>> print(a[2])

16

d

>>> print(len(b))

>>> print(b[1])

2

米

>>> print(len(c))

>>> print(c[2])

3

c

>>> print(len(d))

>>> print(d['name'])

2

24

a = 1

b = 1.0

>>> print(id(a))

>>> print(id(b))

1459716208

2994709930464

>>> print(a is b)

>>> print(a == b)

False

True

#可变类型

>>> l1 = [1,2,3]

>>> print(id(l1))

>>> l1.append(4)

>>> print(id(l1))

1446146289160

1446146289160

>>> info = {'name':'小明', 'age':25}

>>> print(id(info))

>>> print(info)

1446145409600

{'name': '小明', 'age': 25}

>>> info['name'] = '小刚'

>>> print(id(info))

>>> print(info)

1446145409600

{'name': '小刚', 'age': 25}

#不可变类型

>>> a=1

>>> print(id(a))

1459716208

>>> a=2

>>> print(id(a))

1459716240