Dear team,

in some Sage/Cython program i am also using some executables. More
precisely, it is a Gap sub-process that needs to run these
executables.

Now i wonder whether it is possible to change my PATH from within a
Sage session.

I know that i can get the PATH with
  sage: os.environ['PATH']
and so i tried to change os.environ. But it didn't help, apparently
Sage did not tell the operating system where it should look for the
executables that the Gap process needs.

What can i do?

Yours
      Simon

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