Python error: failed to get random numbers

[Rudloff]

Hello,

Since today, I get this error when I try to run C:\Python36\python.exe:

Fatal Python error: failed to get random numbers to initialize Python

It used to work correctly before.

[Rudloff]

Turns out I can't reproduce with a minimal .appveyor.yml so it must be something wrong with my setup.

(Edit: if anyone has the same issue, the Python process needs to inherit AppVeyor's environment variables to work.)

[jayvdb]

@orsinium , I guess from dephell/dephell_venvs#1 / dephell/dephell_venvs#2 that you also encountered this, and it was because of the envvar PYTHON was set?

[orsinium]

@jayvdb thank you for mentioning.

if anyone has the same issue, the Python process needs to inherit AppVeyor's environment variables to work.

That's the answer that helped me. I tried to use totally clean environment for subprocess, but it doesn't work for appveyor

https://github.com/dephell/dephell_venvs/blob/2cedadfc709ddbc3a381417f6b20e06251d62629/dephell_venvs/_builder.py#L108

[orsinium]

it was because of the envvar PYTHON was set?

No, it's because I dropped all other variables as well. I didn't discover which var exactly appveyor needs, but it's not PYTHON*

[jimporter]

For what it's worth, I ran into a similar issue on Github CI and it seems the magic environment variable you need is SYSTEMROOT. Based on this PR I found, you may only need to include SYSTEMROOT if PATH is set: AcademySoftwareFoundation/rez#775.