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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def encode(cls, value):
 """Encodes a value into bencoded bytes. :param value: Python object to be encoded (str, int, list, dict). :param str val_encoding: Encoding used by strings in a given object. :rtype: bytes """

        val_encoding = 'utf-8'

        def encode_str(v):
            try:
                v_enc = encode(v, val_encoding)

            except UnicodeDecodeError:
                if PY3:
                    raise
                else:
                    # Suppose bytestring
                    v_enc = v

            prefix = encode('%s:' % len(v_enc), val_encoding)
            return prefix + v_enc

        def encode_(val):
            if isinstance(val, str_type):
                result = encode_str(val)

            elif isinstance(val, int_types):
                result = encode(('i%se' % val), val_encoding)

            elif isinstance(val, (list, set, tuple)):
                result = encode('l', val_encoding)
                for item in val:
                    result += encode_(item)
                result += encode('e', val_encoding)

            elif isinstance(val, dict):
                result = encode('d', val_encoding)

                # Dictionaries are expected to be sorted by key.
                for k, v in OrderedDict(sorted(val.items(), key=itemgetter(0))).items():
                    result += (encode_str(k) + encode_(v))

                result += encode('e', val_encoding)

            elif isinstance(val, byte_types):
                result = encode('%s:' % len(val), val_encoding)
                result += val

            else:
                raise BencodeEncodingError('Unable to encode `%s` %s' % (type(val), val))

            return result

        return encode_(value)