"ImportError: No module named gobject"

[Luther]

I recently had to install 2.7.1 from source, and since then, I have
been unable to run exaile, which comes with Trisquel 4.0. Here is the
error message:

Traceback (most recent call last):
  File "/usr/lib/exaile/exaile.py", line 52, in <module>
    main()
  File "/usr/lib/exaile/exaile.py", line 49, in main
    exaile = main.Exaile()
  File "/usr/lib/exaile/xl/main.py", line 74, in __init__
    self.mainloop_init()
  File "/usr/lib/exaile/xl/main.py", line 439, in mainloop_init
    import gobject
ImportError: No module named gobject

Is there some special way to compile Python? Do I have to install
another Debian package?