improve Py2/3 compat

Change-Id: I1dfdcb88a492401851d5157c734cd708496bf004
Reviewed-on: https://forge.frm2.tum.de/review/17734
Tested-by: JenkinsCodeReview <bjoern_pedersen@frm2.tum.de>
Reviewed-by: Enrico Faulhaber <enrico.faulhaber@frm2.tum.de>

secop/simulation.py

@@ -40,7 +40,7 @@ class SimBase(object):
         if '.extra_params' in cfgdict:
             extra_params = cfgdict.pop('.extra_params')
             # make a copy of self.parameter
-            self.parameters = dict((k,v.copy()) for k,v in self.parameters.items())
+            self.parameters = dict((k, v.copy()) for k, v in self.parameters.items())
             for k in extra_params.split(','):
                 k = k.strip()
                 self.parameters[k] = Param('extra_param: %s' % k.strip(),