mysql dev needed by the python mysql module

dpkg --list '*mysql*dev'
Desired=Unknown/Install/Remove/Purge/Hold
| Status=Not/Inst/Conf-files/Unpacked/halF-conf/Half-inst/trig-aWait/Trig-pend
|/ Err?=(none)/Reinst-required (Status,Err: uppercase=bad)
||/ Name                              Version               Architecture          Description
+++-=================================-=====================-=====================-========================================================================
ii  libmysqlclient-dev                5.5.38-0ubuntu0.14.04 amd64                 MySQL database development files
un  libmysqlclient10-dev              <none>                <none>                (no description available)
un  libmysqlclient12-dev              <none>                <none>                (no description available)
un  libmysqlclient14-dev              <none>                <none>                (no description available)
un  libmysqlclient15-dev              <none>                <none>                (no description available)