code: def get_executable(self, fullname):
          
          result = None
          modname, exname = fullname.split(".")
          module = self.get(modname)
          if module is not None:
              if exname in module.executables:
                  result = module.executables[exname]
  
          return result
docs: Gets the executable corresponding to the specified full name.
  
          :arg fullname: a string with modulename.executable.