Arch Linux

Description:
After upgrading python2-pexpect from 3.3-2 to 4.0.1-1 today, it is broken, because it fails to load the 'ptyprocess' module.

For me it happend with duplicity (using the pexpect backend for ssh), I got this backtrace:
...
File "/usr/lib/python2.7/site-packages/pexpect/__init__.py", line 75, in <module>
from .pty_spawn import spawn, spawnu
File "/usr/lib/python2.7/site-packages/pexpect/pty_spawn.py", line 11, in <module>
import ptyprocess
ImportError: No module named ptyprocess

I found similar issues in the forum with other software:
https://bbs.archlinux.org/viewtopic.php?id=204292
https://bbs.archlinux.org/viewtopic.php?id=204287

fix:
The ptyprocess module is provided by the python2-ptyprocess package.
Installing this package fixes the bug, so python2-pexpect should depend on python2-ptyprocess.

Additional info:
You may want to check the python3 package as well.