code: def qteGetVariableDoc(self, varName: str, module=None):
          
          # Use the global name space per default.
          if module is None:
              module = qte_global
  
          # No documentation for the variable can exists if the doc
          # string dictionary is undefined.
          if not hasattr(module, '_qte__variable__docstring__dictionary__'):
              return None
  
          # If the variable is undefined then return **None**.
          if varName not in module._qte__variable__docstring__dictionary__:
              return None
  
          # Return the requested value.
          return module._qte__variable__docstring__dictionary__[varName]
docs: Retrieve documentation for ``varName`` defined in ``module``.
  
          If ``module`` is **None** then ``qte_global`` will be used.
  
          |Args|
  
          * ``varName`` (**str**): variable name.
          * ``module`` (**Python module**): the module in which the
            variable should be defined.
  
          |Returns|
  
          **str**: documentation string for ``varName``.
  
          |Raises|
  
          * **QtmacsArgumentError** if at least one argument has an invalid type.