This makes it sound like Pythran supports polymorphic variables, but above the following was said 

```
   "It does *not* support global variables, user classes or any dynamic feature 
   such as introspection, polymorphic variables."
```
and 
```
"Pythran only supports polymorphic variables for functions," 
```
So, I'm confused how pythran can manipulate them without supporting them. Maybe it will be clear if you explain what you mean when you say 'manipulate.'