human
Complete this python program:
def _SimpleDecoder(wire_type, decode_value):
assistant
#Here is the Python code you requested.

    """Return a constructor for a decoder for fields of a particular type.
    Args:
    wire_type:  The field\s wire type.
    decode_value:  A function which decodes an individual value, e.g.
    _DecodeVarint()
    """
    def SpecificDecoder(field_number, is_repeated, is_packed, key, new_default):
        if is_packed:
            local_DecodeVarint = _DecodeVarint
            def DecodePackedField(buffer, pos, end, message, field_dict):
                value = field_dict.get(key)
                if (value is None):
                    value = field_dict.setdefault(key, new_default(message))
                (endpoint, pos) = local_DecodeVarint(buffer, pos)
                endpoint += pos
                if (endpoint > end):
                    raise _DecodeError('Truncated    message.')
                while (pos < endpoint):
                    (element, pos) = decode_value(buffer, pos)
                    value.append(element)
                if (pos > endpoint):
                    del value[(-1)]
                    raise _DecodeError('Packed    element    was    truncated.')
                return pos
            return DecodePackedField
        elif is_repeated:
            tag_bytes = encoder.TagBytes(field_number, wire_type)
            tag_len = len(tag_bytes)
            def DecodeRepeatedField(buffer, pos, end, message, field_dict):
                value = field_dict.get(key)
                if (value is None):
                    value = field_dict.setdefault(key, new_default(message))
                while 1:
                    (element, new_pos) = decode_value(buffer, pos)
                    value.append(element)
                    pos = (new_pos + tag_len)
                    if ((buffer[new_pos:pos] != tag_bytes) or (new_pos >= end)):
                        if (new_pos > end):
                            raise _DecodeError('Truncated    message.')
                        return new_pos
            return DecodeRepeatedField
        else:
            def DecodeField(buffer, pos, end, message, field_dict):
                (field_dict[key], pos) = decode_value(buffer, pos)
                if (pos > end):
                    del field_dict[key]
                    raise _DecodeError('Truncated   ...