sys:1: PyGIWarning: Gtk was imported without specifying a version first. Use gi.require_version('Gtk', '3.0') before import to ensure that the right version gets loaded.
Traceback (most recent call last):
  File "/usr/share/catfish/bin/catfish.py", line 43, in <module>
    import catfish
  File "/usr/share/catfish/catfish/__init__.py", line 25, in <module>
    from catfish import CatfishWindow
  File "/usr/share/catfish/catfish/CatfishWindow.py", line 30, in <module>
    import pexpect
  File "/usr/lib/python3.5/site-packages/pexpect/__init__.py", line 75, in <module>
    from .pty_spawn import spawn, spawnu
  File "/usr/lib/python3.5/site-packages/pexpect/pty_spawn.py", line 11, in <module>
    import ptyprocess
ImportError: No module named 'ptyprocess'