[juanpotato]

You're right and I should have added more details. fontforge only accepts file paths and not strings sadly

[monsieurbanana]

Libraries to treat strings as files are pretty common, in python they have one in the std:

https://docs.python.org/2/library/stringio.html

[juanpotato]

But that's a file, it accepts a file path. I already looked into this