How Do I Get the IDE to Find My Imports

[petec]

I have a .py program that runs using Python 2.7 but fails in Python 3.7.2.
It fails at the first import statement.
I started asking for help in thread:
https://python-forum.io/Thread-How-Do-I-...My-Imports
I started to wander around too much in that thread and I have tried many things since the last post.
I am pursuing the potential problem outlined in the title of this post. I simplified the program from that post. The one I am trying to run is below. If I run it with python 2.7 it runs fine. If I run it with python 3.7.2 the window opens then closes. If I load it into IDLE (python 3.7 version) and try to run it I get:
"Traceback (most recent call last):
File "(long path removed)gnuradio\gr\__init__.py", line 37, in <module>
from runtime_swig import *
ModuleNotFoundError: No module named 'runtime_swig'

(lots more error message removed)

It looks like "from gnuradio import gr" causes it to go to __init__.py which then has a step at line 37 which says "from runtime_swig import *" however gr desn't have runtime_swig. It has runtime_swig.py, runtime_swig.pyc, and runtime_swig.pyo.

Somehow python 2.7 doesn't mind this but python 3.7 does.
Any ideas?

from gnuradio import gr
from gnuradio import audio
from gnuradio import analog

class my_top_block(gr.top_block):

    def __init__(self):
        gr.top_block.__init__(self)
        sample_rate = 32000
        ampl = 0.1

        src0 = analog.sig_source_f(sample_rate, analog.GR_SIN_WAVE, 350, ampl)
        src1 = analog.sig_source_f(sample_rate, analog.GR_SIN_WAVE, 440, ampl)
        dst = audio.sink(sample_rate, "")
        self.connect(src0, (dst, 0))
        self.connect(src1, (dst, 1))


if __name__ == '__main__':

    try:

        my_top_block().run()

    except [[KeyboardInterrupt]]:

        pass