Python常用模块pickle——对象序列化

对Python对象进行序列化，便于存储和传输

pickle.dumps(obj) 将Python对象转化为bytes类型
pickle.loads(str) 将转化成的bytes类型数据还原成对象

Python 3.7.0 (v3.7.0:1bf9cc5093, Jun 27 2018, 04:59:51) [MSC v.1914 64 bit (AMD64)] on win32
Type "copyright", "credits" or "license()" for more information.
>>> import pickle
>>> mydict = {'id':123, 'name':'abc'}
>>> pickle_str = pickle.dumps(mydict)
>>> pickle_str
b'x80x03}qx00(Xx02x00x00x00idqx01K{Xx04x00x00x00nameqx02Xx03x00x00x00abcqx03u.'
>>> newdict = pickle.loads(pickle_str)
>>> newdict
{'id': 123, 'name': 'abc'}

>>> import pickle
>>> mydict = {'id':123, 'name':'abc'}
>>> file = open('pickle.txt','wb')
>>> pickle.dump(mydict, file)
>>> file.close()

>>> import pickle
>>> file = open('pickle.txt','rb')
>>> newdict = pickle.load(file)
>>> file.close()
>>> newdict
{'id': 123, 'name': 'abc'}