And the pickle module base64

pickle

python pickle module is a standard module, provides a sequence of operation for the python data bytes can be converted to the data type, the sequence of which is higher than the velocity json module.
the pickle.dumps () to serialize the data bytes type python
The pickle.loads () the type of data bytes deserialized data type python

base64

Base64 is based on 64 printable characters to represent binary data representation. Since 6 = 2 ^ 64, so every six bits as a unit, corresponding to a printable character. 3 bytes of 24 bits, corresponding to four Base64 units, i.e. 3 bytes by four printable characters to represent. Base64 printable characters includes the letters AZ, az, 0-9, so that a total of 62 characters, in addition to two symbols can be printed in various different systems.
Base64 commonly used in the normal process in the case of text data, said transmission, storing some binary data, including some complex data MIME email and XML.
python standard library provided base64 module for converting
base64.b64encode () the data bytes base64 encoding type, returns the encoded bytes type
base64.b64deocde () the type or base64 encoded bytes str type decoding, the return type of the decoded bytes

Demo：

import base64
import pickle
cart_dict = {1: [2, True], 2: [1, True]}

# dict -> bytes -> str
cart_bytes = pickle.dumps(cart_dict)        # 将python字典转换为16进制bytes类型
print(type(cart_bytes), "|", cart_bytes)    # <class 'bytes'>

cart_b64_bytes = base64.b64encode(cart_bytes)       # 转换为base64_bytes
print(type(cart_b64_bytes), "|", cart_b64_bytes)    # <class 'bytes'>

cart_b64_str = cart_b64_bytes.decode()          # 解码成base64_str
print(type(cart_b64_str), "|", cart_b64_str)    # <class 'str'>

print("=" * 100)

cart_b64_str = "gAN9cQAoSwFdcQEoSwKIZUsCXXECKEsBiGV1Lg=="
# str -> bytes ->dict 
cart_bytes = base64.b64decode (cart_b64_str) # directly convert the string to a hexadecimal bytes base64_str
Print (type (cart_bytes), "|", cart_bytes) # <class 'bytes'> 

cart_dict = The pickle.loads (cart_bytes) # converted to hexadecimal bytes python dictionary 
print (type (cart_dict), " |", cart_dict) # <class 'dict'> 

# It is noted that: in the process of the dictionary obtained python, base64.decode () can be decoded base64_bytes, may be direct decoding base64_str

end~

And the pickle module base64

pickle

base64

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