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Python 3: An interactive deep dive

Pickling Without a File

Explore how to serialize Python objects directly to bytes in memory using pickle.dumps and deserialize them using pickle.loads. This lesson teaches how to avoid files for data persistence while maintaining exact object replicas.

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The examples in the previous section showed how to serialize a Python object directly to a file on disk. But what if you don’t want or need a file? You can also serialize to a bytes object in memory.

Python 3.5
import pickle
shell = 1
print (shell)
#1
with open('entry.pickle', 'rb') as f:    
     entry = pickle.load(f)               
b = pickle.dumps(entry)             #①
print (type(b))                     #②
#<class 'bytes'>
entry3 = pickle.loads(b)            #③
print (entry3 == entry)             #④
#True

① The ...