I am working on C++ programming with perforce (a version control tool) on VMS.
I need to handle tens or even hundreds of C++ files (managed by perforce) on VMS. 
I am familiar with Linux, python but not DCL (a script language) on VMS. 
I need to find a way to make programming/debug/code-review as easy as possible. 
I prefer using python and kscope (a kde based file search/code-review GUI tool that can generate call graph) or similar tools on VMS. 
I do not have sys-adm authorization, so I prefer some code-review GUI tools that can be installed without the  authorization. 
Would you please give me some suggestions about how to do code-review/debug/programing/compile/test by python on VMS meanwhile using kscope or similar large-scale files management tools for code-review ? 
Any help will really be appreciated. 
Thanks
Indeed, it's not clear from your question what sort of programming you want to do on VMS: C++ or python??
Assuming your first goal is to get familiar with the code-base, i.e. you want the ease of cross-ref'ing the sources:

If you have Perforce server running on VMS, then you may try to connect to it directly with Linux Perforce client. And do "review" locally on Linux.
If you've no Linux client, I'd try fetching the latest revisions off and importing raw files it into an external repository (svn, git, fossil etc.). Then again using Linux client and tools.

If your ultimate goal is to do all development off VMS, then it may not really be viable -- the code may use VMS specific includes, system/RMS calls, data structs. And sync'ing the changes back and forth to VMS will get messy.
From my experience, once you're familiar with the code-base, it's a lot more effective to make the code-changes directly on VMS using whatever editor is available (EDIT/TPU, EDT, LSE, emacs or vim ports etc.).
As for debugging - VMS native debugger supports X-GUI as well as command-line. Check your build system for debug build, or use /NOOPT /DEBUG compile and /DEBUG link qualifiers.
BTW, have a look into DECset, if installed on your VMS system.
How to do code-review/debug/coding/test/version-control for C++ on perforce and VMS