sudo apt-get --force-yes install   pithos
Reading package lists... Done
Building dependency tree       
Reading state information... Done
pithos is already the newest version (1.1.1-2).
The following package was automatically installed and is no longer required:
  libqoauth1
Use 'sudo apt autoremove' to remove it.
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
1 not fully installed or removed.
After this operation, 0 B of additional disk space will be used.
Do you want to continue? [Y/n] Y
Setting up pithos (1.1.1-2) ...
Failed to import the site module
Traceback (most recent call last):
  File "/usr/lib/python3.5/site.py", line 580, in <module>
    main()
  File "/usr/lib/python3.5/site.py", line 566, in main
    known_paths = addusersitepackages(known_paths)
  File "/usr/lib/python3.5/site.py", line 287, in addusersitepackages
    user_site = getusersitepackages()
  File "/usr/lib/python3.5/site.py", line 263, in getusersitepackages
    user_base = getuserbase() # this will also set USER_BASE
  File "/usr/lib/python3.5/site.py", line 253, in getuserbase
    USER_BASE = get_config_var('userbase')
  File "/usr/lib/python3.5/sysconfig.py", line 595, in get_config_var
    return get_config_vars().get(name)
  File "/usr/lib/python3.5/sysconfig.py", line 538, in get_config_vars
    _init_posix(_CONFIG_VARS)
  File "/usr/lib/python3.5/sysconfig.py", line 410, in _init_posix
    from _sysconfigdata import build_time_vars
  File "/usr/lib/python3.5/_sysconfigdata.py", line 6, in <module>
    from _sysconfigdata_m import *
ImportError: No module named '_sysconfigdata_m'
dpkg: error processing package pithos (--configure):
 subprocess installed post-installation script returned error exit status 1
Errors were encountered while processing:
 pithos
Error: GDBus.Error:org.freedesktop.DBus.Error.Spawn.ChildExited: Launch helper exited with unknown return code 1
E: Sub-process /usr/bin/dpkg returned an error code (1)