human
Complete the below
def GroupEncoder(field_number, is_repeated, is_packed):

    ''''Returns an encoder for a group field.'
    '''
 What is a the Python program you requested?
assistant
#Here is the Python program you requested.
    start_tag = TagBytes(field_number, wire_format.WIRETYPE_START_GROUP)
    end_tag = TagBytes(field_number, wire_format.WIRETYPE_END_GROUP)
    assert (not is_packed)
    if is_repeated:
        def EncodeRepeatedField(write, value):
            for element in value:
                write(start_tag)
                element._InternalSerialize(write)
                write(end_tag)
        return EncodeRepeatedField
    else:
        def EncodeField(write, value):
            write(start_tag)
            value._InternalSerialize(write)
            return write(end_tag)
        return EncodeField