Cannot access from my virtual environment

I followed the docs for installation to Windows 10, and as long as I’m not in my Django project’s virtual environment, everything works fine. When I activate my virtual environment, I get the

OSError: no library called "cairo" was found
cannot load library 'C:\Users\####\####\Lib\site-packages\GTK3-Runtime Win64\bin\libcairo-2.dll': error 0x7e
cannot load library 'libcairo.so.2': error 0x7e
cannot load library 'libcairo.2.dylib': error 0x7e
cannot load library 'libcairo-2.dll': error 0x7e

When I check the

WHERE zlib1.dll

From the environment, the path is found and correct. And the same is true for WHERE libcairo-2.dll.

Since the path is clearly visible within the environment, I don’t understand why I’m getting the error when I run the test command:

python -m weasyprint http://weasyprint.org weasyprint.pdf

From my environment, but not from the standard command prompt.

[Tontyna]

What is the output of

python -c "import os; print(*os.environ['PATH'].split(os.pathsep), sep='\n')"

when you run it in your Django environment?

[Tontyna]

@FaxMeBeer if you want to run WeasyPrint from the command prompt, outside of Visual Studio, without the need of an extra Python script, without the need of repeatedly typing SET PATH, you should adjust the PATH in your Windows 10 environment variables.