Do you allow using the PSF website as src for pictures in other websites?

[CAM-Gerlach]

Yep. To note, though, the user opened another thread,

Use of the "python powered" logo

As such, stating accurately that software is written in the Python programming language, that it is compatible with the Python programming language, or that it contains the Python programming language, is always allowed. In those cases, you may use the word “Python” or the unaltered logos to indicate this, without our prior approval. This is true both for non-commercial and commercial uses. I wanted to put the “python powered” logo at the bottom of the web page and set the Python logo as the …

in which they mentioned they would also

@Hubert

set the Python logo as the favicon.

which may be a very different story, at least as far as avoiding user confusion (== trademark) is concerned.