code: def bytes_to_int(bytes_, width = None):
  	
  	if(width == None):
  		width = len(bytes_)
  	else:
  		width = width // 8
  	if(width > len(bytes_)):
  		padding = b"\x00" * (width - len(bytes_))
  		bytes_ = bytes_ + padding
  	ints = [ (int_ << (shift * 8)) for shift, int_ in enumerate(bytes_[:width])]
  	return sum(ints)
docs: .. _bytes_to_int:
  
  	Converts the ``bytes`` object ``bytes_`` to an ``int``.
  	If ``width`` is none, ``width = len(byte_) * 8`` is choosen.
  
  	See also: int_to_bytes_
  
  	*Example*
  
  	>>> from py_register_machine2.engine_tools.conversions import *
  	>>> i = 4012
  	>>> int_to_bytes(i)
  	b'\xac\x0f'
  	>>> bytes_to_int(int_to_bytes(i)) == i
  	True