I switch back and forth between Java and Python quite frequently in eclipse. One thing I miss about browsing through code in PyDev is the ability to search for usages of a particular variable or class or method or whatever.
I realize this is difficult to accomplish but I have used PyCharm which has this feature and am pleased with their implementation and just wish PyDev had it too.
It would be nice to do something like search for variable read or write and also search for references or declarations (I guess declarations isn't as big of a deal since you can already go to the definition directly). This would really help as you browse and navigate through the code, especially if you are using a new library and want to learn how to use it and get used to it.