<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def storage_get(self, key):
 """ Retrieve a value for the module. """

        if not self._module:
            return
        self._storage_init()
        module_name = self._module.module_full_name
        return self._storage.storage_get(module_name, key)