py3

#дока это примерно вот так:
help(int.to_bytes)

Help on method_descriptor:

to_bytes(...)
    int.to_bytes(length, byteorder, *, signed=False) -> bytes
    
    Return an array of bytes representing an integer.
    
    The integer is represented using length bytes.  An OverflowError is
    raised if the integer is not representable with the given number of
    bytes.
    
    The byteorder argument determines the byte order used to represent the
    integer.  If byteorder is 'big', the most significant byte is at the
    beginning of the byte array.  If byteorder is 'little', the most
    significant byte is at the end of the byte array.  To request the native
    byte order of the host system, use `sys.byteorder' as the byte order value.
    
    The signed keyword-only argument determines whether two's complement is
    used to represent the integer.  If signed is False and a negative integer
    is given, an OverflowError is raised.