No module named PyQt5 -- raspbian

[gamselem]

Hello,

I'm trying to run the raspbian executable (poseidon_main_v0.5.0_raspbian_executable_2018-08-29) on my raspberry pi. When I double click it, nothing happens. When I execute it through the command line, I get the following error:

File "/home/pi/Desktop/poseidon_main.py", line 13, in <module>
ImportError: No module named PyQt5 
[1542] Failed to execute script poseidon_main

I've done sudo apt-get install python3-pyqt5 but that doesn't solve the problem. Is there something else I should do? I have Raspbian buster installed on my Pi.

Thanks.

[jsdearbo]

Hm. I was able to rectify this same issue with the sudo apt-get script you show above. Are you specifying python3 when you call poseidon_main.py?
for example: python3 poseidon_main.py