pickle() and cPickle('s module) are equivalent to java's serialization and deserialization operations.
It is often used in the following way:
import pickle (obj,f) (obj,f) (f) (f)
With the pickle module you can save Python objects directly to a file without converting them to strings or using underlying file access operations to write them to a binary file. The pickle module creates a python language-specific binary format, so you don't have to think about any of the details of the file, and it will do the read/write-only operations for you cleanly, the only thing you need is a legal file handle.
The two main functions in the pickle module are dump() and load():
The dump() function accepts a file handle and a data object as arguments and saves the data object in a specific format to the given file. When we use the load() function to retrieve saved objects from a file, pickle knows how to restore those objects to their original format.
dumps()Function execution anddump() function the same serialization. Instead of accepting stream objects and saving the serialized data to a disk file, this function simply returns the serialized data.
loads() function performs the same deserialization as the load() function. Instead of accepting a stream object and go to the file to read the serialized data, it accepts the str object containing the serialized data, the object returned directly.
Example:
# -*- coding:utf-8 -*-
import pickle
obj = 123, "abcdef", ["ac", 123], {"key": "value", "key1": "value1"}
print(obj)
# Serialize to file
with open(r"F:\pycodes\ML\", "wb") as f:
(obj, f)
with open(r"F:\\pycodes\\ML\\", "rb") as f:
print((f))# Output: (123, 'abcdef', ['ac', 123], {'key': 'value', 'key1': 'value1'})
# Serialized into memory (saved in string format), the object can then be handled in any way such as via network transfer
obj1 = (obj)
print(type(obj1))# Output <class 'bytes' >
print(obj1)# Output: python-specific storage format b'\x80\x03(K{X\x06\x00\x00\x00abcdefq\x00]q\x01(X\x02\x00\x00\x00acq\x02K{e}q\x03(X\x03\x00\x00\x00\x00keyq\x04X\x05\ x00\x00\x00valueq\x05X\x04\x00\x00\x00\x00key1q\x06X\x06\x00\x00\x00\x00\x00value1q\x07utq\x08.'
obj2 = (obj1)
print(type(obj2))# Output: <class 'tuple'>
print(obj2) # exports：(123, 'abcdef', ['ac', 123], {'key': 'value', 'key1': 'value1'})
summarize
The above is a small introduction to the Python3 pickle module usage, I hope to help you, if you have any questions please leave me a message, I will promptly reply to you. I would also like to thank you very much for your support of my website!
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