# 10 examples of 'python byte to int' in Python

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``9def byte_to_int(byte):  # already byte10    return byte``
``226def _bytes_to_int(b):227    return int(codecs.encode(b, "hex"), 16)``
``115def bytes_to_int(bytes):116    return reduce(lambda s, x: (s &lt;&lt; 8) + x, bytearray(bytes))``
``42def bytes_to_int(be_bytes):43    """ Interprets a big-endian sequence of bytes as an integer. """44    return int(hexlify(be_bytes), 16)``
``178def bytes_to_int(byte_array):179    """180    Converts the provided bytearray in an Integer.181    This integer is result of concatenate all components of `byte_array`182    and convert that hex number to a decimal number.183184    Args:185        byte_array (Bytearray): bytearray to convert in integer.186187    Returns:188        Integer: the integer corresponding to the provided bytearray.189190    Example:191        &gt;&gt;&gt; x = bytearray([0xA,0x0A,0x0A]) #this is 0xA0A0A192        &gt;&gt;&gt; print(bytes_to_int(x))193        657930194        &gt;&gt;&gt; b = bytearray([0x0A,0xAA])    #this is 0xAAA195        &gt;&gt;&gt; print(bytes_to_int(b))196        2730197    """198    if len(byte_array) == 0:199        return 0200    return int("".join(["%02X" % i for i in byte_array]), 16)``
``92def int_from_bytes(mybytes, byteorder='big', signed=False):93    """94    Return the integer represented by the given array of bytes.95    The mybytes argument must either support the buffer protocol or be an96    iterable object producing bytes.  Bytes and bytearray are examples of97    built-in objects that support the buffer protocol.98    The byteorder argument determines the byte order used to represent the99    integer.  If byteorder is 'big', the most significant byte is at the100    beginning of the byte array.  If byteorder is 'little', the most101    significant byte is at the end of the byte array.  To request the102    native byte order of the host system, use `sys.byteorder' as the byte103    order value.104    The signed keyword-only argument indicates whether two's complement is105    used to represent the integer.106    """107    if byteorder not in ('little', 'big'):108        raise ValueError("byteorder must be either 'little' or 'big'")109    if isinstance(mybytes, unicode):110        raise TypeError("cannot convert unicode objects to bytes")111    # mybytes can also be passed as a sequence of integers on Py3.112    # Test for this:113    elif isinstance(mybytes, collections.Iterable):114        mybytes = bytes(mybytes)115    b = mybytes if byteorder == 'big' else mybytes[::-1]116    if len(b) == 0:117        b = b'\x00'118    # The encode() method has been disabled by newbytes, but Py2's119    # str has it:120    num = int(b.encode('hex'), 16)121    if signed and (b[0] &amp; 0x80):122        num = num - (2 ** (len(b)*8))123    return num``
``171def decodeint(s):172    return int(binascii.hexlify(s[:32][::-1]), 16)``
``162def _deserialize_int(bytes):163    return int.from_bytes(bytes, 'big')``
``79def bytes_to_int(b):        # Read as little endian.80    fmtmap = {1: 'b', 2: '``
``34def _from_bytes(value, dummy, _int=int, _hexlify=binascii.hexlify):35    "An implementation of int.from_bytes for python 2.x."36    return _int(_hexlify(value), 16)``