Which editor is suited for view a python package's source?

[jfong at ms4.hinet.net]

I like to download one package's source and study it in an editor. It allows me to open the whole package as a project and let me jump from a reference in one file to its definition in another file back and forth. It will be even better if it can handle the import modules too. (Maybe this is too much:-)

Can anyone recommend such a tool?

--Jach