I try to solve my problem asked on stackoverflow about a python script which uses TeX to create matplotlib labels. see https://stackoverflow.com/questions/50875637/matplotlib-how-do-i-have-to-provide-font-metrics-files-for-rendering-text-by-te for details.
It turns out that a tfm file is missing. FileNotFoundError: missing font metrics file: rsfs10
However, the package rsfs is installed, but the package does not contain the tfm files. https://ctan.org/tex-archive/fonts/rsfs/ Is there any reason for that? Where could I get such tfm file?
I already found a similar topic: Problem finding metafonts at compilation The solution which was provided there, was the installation of the package. But this is already done on my system.