code: def global_variables(self):
          
          it = ffi.lib.LLVMPY_ModuleGlobalsIter(self)
          return _GlobalsIterator(it, dict(module=self))
docs: Return an iterator over this module's global variables.
          The iterator will yield a ValueRef for each global variable.
  
          Note that global variables don't include functions
          (a function is a "global value" but not a "global variable" in
           LLVM parlance)