How to Convert Int to Bytes in Python?

In Python, you can convert an integer to bytes using the to_bytes() method. This method returns a byte representation of the integer in a specified number of bytes.

Here is an example of how to use to_bytes():

# Example integer
integer_value = 12345

# Convert integer to bytes
# Parameters: number of bytes, byte order ('big' or 'little')
byte_value = integer_value.to_bytes((integer_value.bit_length() + 7) // 8, 'big')

print(byte_value)  # Output: b'\x30\x39'

Parameters of to_bytes():

1. length (int): The number of bytes to represent the integer. If the integer is large, you’ll need to increase the byte length.
2. byteorder (str): This determines the byte order used to represent the integer. It can either be 'big' (most significant byte first) or 'little' (least significant byte first).

Example usage:

• Integer to bytes (big-endian): integer_value.to_bytes(4, 'big') converts the integer into 4 bytes with the most significant byte first.
• Integer to bytes (little-endian): integer_value.to_bytes(4, 'little') converts the integer into 4 bytes with the least significant byte first.

If you want to convert back from bytes to an integer, you can use the int.from_bytes() method:

# Convert bytes back to integer
int_value = int.from_bytes(byte_value, 'big')
print(int_value)  # Output: 12345