Python Block to selectively pass signals

[Sri Pramodh Rachuri]

Hi,

I am trying to make a python block that drops the frames that don't have the presence of a signal but forwards if there is. I tried using "basic block" but always got the error "Param - Code(_source_code): No python block class found in code". Please check the attachments for the code I wrote.

Please help me find the mistake I am doing.

Thanks!

epy_block_1_RW_RI1.py
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