Understanding the Conversion from Bytes to Integers
While working on an encryption/decryption program, you face the need to convert bytes to integers. It's crucial to recognize that the inverse of bytes([3]) = b'x03' isn't immediately clear. Let's delve deeper into the solution to this conversion issue.
Python 3.2 introduced an intuitive function for this conversion: int.from_bytes. This function requires three parameters:
Here are some examples to illustrate the usage:
<code class="python">int.from_bytes(b'\x00\x01', "big") # 1 int.from_bytes(b'\x00\x01', "little") # 256 int.from_bytes(b'\x00\x10', byteorder='little') # 4096 int.from_bytes(b'\xfc\x00', byteorder='big', signed=True) # -1024</code>
By leveraging the int.from_bytes function, you can efficiently convert bytes to integers with the desired byte order and signedness. This functionality greatly simplifies your encryption/decryption program's handling of bytes and integers.
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