> info = dict(name='cold', blog='www.linuxzen.com') # 创建字典{'name':'cold', 'blog':'www.linuxzen.com'}
> info2 = info   # 赋值给info2
> info2['name'] = 'cold night'
> info
> info2
{'blog': 'www.linuxzen.com', 'name': 'cold night'}
> info
{'blog': 'www.linuxzen.com', 'name': 'cold night'}
> names = ['cold', 'night', 'linuxzen']
> names2 = names
> names2.append('cold night')
> names
['cold', 'night', 'linuxzen', 'cold night']
> names2
['cold', 'night', 'linuxzen', 'cold night']

> def add_something(info):
...   if type(info) == dict:
...       info['msg'] = 'Hello,'+ info['name']
...   elif type(info) == list:
...       info.append('add to the list')
... 
> info = {'name':'cold', 'blog':'www.linuxzen.com'}
> add_something(info)
> info
{'blog': 'www.linuxzen.com', 'msg': 'Hello,cold', 'name': 'cold'}
> names = ['cold', 'night', 'linuxzen.com']
> add_something(names)
> names
['cold', 'night', 'linuxzen.com', 'add to the list']

> names = ['cold', 'night', 'linuxzen.com']
> names2 = names[:]
> names2.append('cold night')
> names
['cold', 'night', 'linuxzen.com']
> names2
['cold', 'night', 'linuxzen.com', 'cold night']
> info = {'name':'cold night', 'blog':'www.linuxzen.com'}
> info2 = info.copy()
> info2['name'] = 'cold'
> info
{'blog': 'www.linuxzen.com', 'name': 'cold night'}
> info2
{'blog': 'www.linuxzen.com', 'name': 'cold'}