python--serializing objects using pickle

Pickle Serialized Objects

If you want to store Python objects transparently without losing information such as their identity and type, you need some form of object serialization: It is a process of turning arbitrarily complex objects into text or binary representations of objects.

Similarly, you must be able to restore an object to its original object in a serialized form. In Python, this serialization process is called Pickle,

You can pickle an object into a string, a file on disk, or any file-like object, or you can unpickle the string, file, or any file-like object into the original object

Code instance

Import Pickleclass Mypickle (object): Def __init__ (self,file_name): self.file_name = file_name def dump (self,o            BJ): "" "serialized object:p Aram obj:: return:" "with open (self.file_name, ' AB ') as F:         Pickle.dump (obj, f) print (' Dump data ', obj.__dict__) def loaditer (self): "" "iterates over the deserialized object  : Return: "" "F = open (Self.file_name, ' RB ') while True:try:obj = Pickle.load (f) yield obj except Eoferror:print (' Eoferror ') f.clo        SE () print (f.closed) breakclass person:def __init__ (self,n,a): self.name=n  Self.age=a def Show (self): print (self.name+ "_" +str (self.age)) AA = person ("Agood", 2) BB = person ("Bgood", 3) cc = Person ("Cgood", 4) p = mypickle (' c.txt ') p.dump (aa) P.dump (BB) p.dump (cc) iter_obj = P.loaditer () while True:try:pri NT (Next (iter_obj). __dict__) except Stopiteration:print (' Stop ') break 

Output results

Dump data {' name ': ' Agood ', ' age ': 2}dump data {' name ': ' Bgood ', ' age ': 3}dump data {' name ': ' Cgood ', ' age ': 4}{' name ': ' A Good ', ' age ': 2}{' name ': ' Bgood ', ' age ': 3}{' name ': ' Cgood ', ' age ': 4}eoferrortruestop

　　

python--serializing objects using pickle