Trying to run "helloworld.py" in PyCharm 2020.2 which I thought I'd installed via Anaconda
this error appears in a few threads but the discussions are always about stuff that's a bit beyond a hello world program. I think it might be something to do with this PYTHONPATH thing but I don't understand where this is set (its not in Windows system environment variables), or who set it, or how to fix it.

C:\Users\DrMan\anaconda3\python.exe
C:/Users/DrMan/AppData/Local/Programs/Python/Python39/helloworld.py
Python path configuration:
PYTHONHOME = (not set)
PYTHONPATH ='C:\Users\DrMan\AppData\Local\Programs\Python\Python39'
program name = 'C:\Users\DrMan\anaconda3\python.exe'
isolated = 0
environment = 1
user site = 1
import site = 1
sys._base_executable = 'C:\Users\DrMan\anaconda3\python.exe'
sys.base_prefix = ''
sys.base_exec_prefix = ''   sys.executable =
'C:\Users\DrMan\anaconda3\python.exe'
sys.prefix = ''
sys.exec_prefix = ''
sys.path = [
'C:\Users\DrMan\AppData\Local\Programs\Python\Python39',
'C:\Users\DrMan\anaconda3\python38.zip',
'C:\Users\DrMan\anaconda3',   ]
Fatal Python error: init_fs_encoding: failed to get the Python codec of the filesystem
encoding Python runtime state: core initialized ModuleNotFoundError:
No module named 'encodings'
Current thread 0x000098b8 (most recent call first): 
Process finished with exit code 1
In my case it was my root python 3.9 installation (used by my venv), that imported a file from my pycharm project (because my project was in PYTHONPATH).
The easiest way to solve the problem was to rename the file python was trying to import, so python would not find it anymore and fall back to the correct file in (my case) C:\python39.
PyCharm: Fatal Python error: init_fs_encoding: failed to get the Python codec of the filesystem encoding