transport: add return type annotation to method __str__
The abstract class LinkBase has no return type annotation on its
__str__ method.
Related: OS#6210
Change-Id: I26d3d2714708dbe957704b60d17ba2afa325b2c4
diff --git a/pySim/transport/calypso.py b/pySim/transport/calypso.py
index b827d88..d7d9649 100644
--- a/pySim/transport/calypso.py
+++ b/pySim/transport/calypso.py
@@ -160,5 +160,5 @@
return b2h(data), b2h(sw)
- def __str__(self):
+ def __str__(self) -> str:
return "osmocon:%s" % (self._sock_path)