PyDoc ValueError: signal only works in main thread
Create file "test.py" with this content:

```python
import pyxel
pyxel.init(160, 120)
```

Then run `pydoc -b` from the same directory.

Now navigate to your **test** module and get the error:

> ErrorDuringImport: problem in test - ValueError: signal only works in main thread or with __pypy__.thread.enable_signals()

I'm new in python so sorry if my issue is noobish, but I have no idea how to provide documentation to my app due to this error.