(bstr)
return ''.join(format(b, '02x') for b in bstr)
Convert a bytestring to a text string of hexadecimal digits.

    This exists solely to support Python 3.4 for Cygwin users.
    bytes(...).hex() was added in Python 3.5.

    Note that most callers of this function need to encode the text string
    back into a bytestring of ASCII characters. This function does not do that
    to remain equivalent to bytes(...).hex().

    Args:
        bstr: The bytestring.

    Returns:
        The text string of hexadecimal digits.
Convert a bytestring to a text string of hexadecimal digits.
Convert a bytestring to a text string of hexadecimal digits .
def bytes_to_hex(bstr):
    """Convert a bytestring to a text string of hexadecimal digits.

    This exists solely to support Python 3.4 for Cygwin users.
    bytes(...).hex() was added in Python 3.5.

    Note that most callers of this function need to encode the text string
    back into a bytestring of ASCII characters. This function does not do that
    to remain equivalent to bytes(...).hex().

    Args:
        bstr: The bytestring.

    Returns:
        The text string of hexadecimal digits.
    """
    return ''.join(format(b, '02x') for b in bstr)
def bytes_to_hex ( bstr ) : return '' . join ( format ( b , '02x' ) for b in bstr )