do not override variable.

modoboa/core/models.py

@@ -340,14 +340,15 @@ class User(PermissionsMixin):
         if len(row) < 7:
             raise BadRequest(_("Invalid line"))
 
-        role = row[6].strip()
+        desired_role = row[6].strip()
         if not user.is_superuser:
             allowed_roles = get_account_roles(user)
             allowed_roles = [role[0] for role in allowed_roles]
-            if role not in allowed_roles:
-                raise PermDeniedException(
-                    _("You can't import an account with a role greater than yours")
-                )
+            if desired_role not in allowed_roles:
+                raise PermDeniedException(_(
+                    "You can't import an account with a role greater than "
+                    "yours"
+                ))
 
         self.username = row[1].strip()
         try:
@@ -357,7 +358,7 @@ class User(PermissionsMixin):
         else:
             raise Conflict
 
-        if role == "SimpleUsers":
+        if desired_role == "SimpleUsers":
             if len(row) < 8 or not row[7].strip():
                 raise BadRequest(
                     _("The simple user '%s' must have a valid email address"
@@ -377,7 +378,7 @@ class User(PermissionsMixin):
         self.last_name = row[4].strip()
         self.is_active = (row[5].strip() in ["True", "1", "yes", "y"])
         self.save(creator=user)
-        self.set_role(role)
+        self.set_role(desired_role)
         if len(row) < 8:
             return
         events.raiseEvent("AccountImported", user, self, row[7:])