Hi all, I am having trouble writing QA code in python for C++ **source** blocks. Unlike the **sync** block demonstrated in the tutorial <https://wiki.gnuradio.org/index.php/Guided_Tutorial_GNU_Radio_in_C%2B%2B> (https://wiki.gnuradio.org/index.php/Guided_Tutorial_GNU_Radio_in_C%2B%2B), which stops when there are no more input items. Since **source** blocks do not take any input, I have no idea how to stop the **source** block once the python QA code was started.
thanks in advance for any advice. Best regards, Bowen
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