Traceback (most recent call last):
  File "/usr/bin/add-apt-repository", line 8, in <module>
    from softwareproperties.SoftwareProperties import SoftwareProperties
  File "/usr/lib/python2.7/dist-packages/softwareproperties/SoftwareProperties.py", line 53, in <module>
    from ppa import AddPPASigningKeyThread, expand_ppa_line
  File "/usr/lib/python2.7/dist-packages/softwareproperties/ppa.py", line 27, in <module>
    import pycurl
ImportError: librtmp.so.0: cannot open shared object file: No such file or directory