embedded python block-Can't interpret source code: "'__name__' not in globals"

Good morning community,

I was trying to create an embedded python module with the same code for fec extended encoder in GNU RADIO 3.10.7 version .I am encountering this problem "Param - Code(_source_code):
Can't interpret source code: "'__name__' not in globals""

it will be very helpful if someone can help me to clear this..The used code is https://github.com/gnuradio/gnuradio/blob/master/gr-fec/python/fec/extended_encoder.py#L21