How to use the ftfy.compatibility.unichr function in ftfy

# enough of the following bytes to decode anything, so consume
                # zero bytes and wait.
                return '', 0
        else:
            if CESU8_RE.match(input):
                # If this is a CESU-8 sequence, do some math to pull out
                # the intended 20-bit value, and consume six bytes.
                bytenums = bytes_to_ints(input[:6])
                codepoint = (
                    ((bytenums[1] & 0x0f) << 16) +
                    ((bytenums[2] & 0x3f) << 10) +
                    ((bytenums[4] & 0x0f) << 6) +
                    (bytenums[5] & 0x3f) +
                    0x10000
                )
                return unichr(codepoint), 6
            else:
                # This looked like a CESU-8 sequence, but it wasn't one.
                # 0xed indicates the start of a three-byte sequence, so give
                # three bytes to the superclass, so it can either decode them
                # as a surrogate codepoint (on Python 2) or handle the error
                # (on Python 3).
                return sup(input[:3], errors, False)

def fixup(match):
        """
        Replace one matched HTML entity with the character it represents,
        if possible.
        """
        text = match.group(0)
        if text[:2] == "&#":
            # character reference
            try:
                if text[:3] == "&#x":
                    return unichr(int(text[3:-1], 16))
                else:
                    return unichr(int(text[2:-1]))
            except ValueError:
                pass
        else:
            # named entity
            try:
                text = unichr(htmlentitydefs.name2codepoint[text[1:-1]])
            except KeyError:
                pass
        return text  # leave as is
    return HTML_ENTITY_RE.sub(fixup, text)

if len(input) < 6:
            if final:
                return sup(input, errors, True)
            else:
                return '', 0
        else:
            if CESU8_RE.match(input):
                bytenums = bytes_to_ints(input[:6])
                codepoint = (
                    ((bytenums[1] & 0x0f) << 16) +
                    ((bytenums[2] & 0x3f) << 10) +
                    ((bytenums[4] & 0x0f) << 6) +
                    (bytenums[5] & 0x3f) +
                    0x10000
                )
                return unichr(codepoint), 6
            else:
                return sup(input[:3], errors, False)

if possible.
        """
        text = match.group(0)
        if text[:2] == "&#":
            # character reference
            try:
                if text[:3] == "&#x":
                    return unichr(int(text[3:-1], 16))
                else:
                    return unichr(int(text[2:-1]))
            except ValueError:
                pass
        else:
            # named entity
            try:
                text = unichr(htmlentitydefs.name2codepoint[text[1:-1]])
            except KeyError:
                pass
        return text  # leave as is
    return HTML_ENTITY_RE.sub(fixup, text)

def remove_bom(text):
    r"""
    Remove a left-over byte-order mark.

    >>> print(remove_bom(unichr(0xfeff) + "Where do you want to go today?"))
    Where do you want to go today?
    """
    return text.lstrip(unichr(0xfeff))