From 58e89eb15a9260104c03d4285920c1d190fc9b80 Mon Sep 17 00:00:00 2001
From: Philipp Maier <pmaier@sysmocom.de>
Date: Tue, 10 Oct 2023 11:59:03 +0200
Subject: [PATCH] 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
---
 pySim/transport/__init__.py    | 2 +-
 pySim/transport/calypso.py     | 2 +-
 pySim/transport/modem_atcmd.py | 2 +-
 pySim/transport/pcsc.py        | 2 +-
 pySim/transport/serial.py      | 2 +-
 5 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/pySim/transport/__init__.py b/pySim/transport/__init__.py
index 1dd8d18c..0b50a4f8 100644
--- a/pySim/transport/__init__.py
+++ b/pySim/transport/__init__.py
@@ -68,7 +68,7 @@ class LinkBase(abc.ABC):
         self.proactive_handler = proactive_handler
 
     @abc.abstractmethod
-    def __str__(self):
+    def __str__(self) -> str:
         """Implementation specific method for printing an information to identify the device."""
 
     @abc.abstractmethod
diff --git a/pySim/transport/calypso.py b/pySim/transport/calypso.py
index b827d88c..d7d9649c 100644
--- a/pySim/transport/calypso.py
+++ b/pySim/transport/calypso.py
@@ -160,5 +160,5 @@ class CalypsoSimLink(LinkBase):
 
         return b2h(data), b2h(sw)
 
-    def __str__(self):
+    def __str__(self) -> str:
         return "osmocon:%s" % (self._sock_path)
diff --git a/pySim/transport/modem_atcmd.py b/pySim/transport/modem_atcmd.py
index 58d6f9d1..5e5a3dd6 100644
--- a/pySim/transport/modem_atcmd.py
+++ b/pySim/transport/modem_atcmd.py
@@ -170,5 +170,5 @@ class ModemATCommandLink(LinkBase):
         log.debug('Command response: %s, %s',  data, sw)
         return data, sw
 
-    def __str__(self):
+    def __str__(self) -> str:
         return "modem:%s" % self._device
diff --git a/pySim/transport/pcsc.py b/pySim/transport/pcsc.py
index 41c4c190..c7b58786 100644
--- a/pySim/transport/pcsc.py
+++ b/pySim/transport/pcsc.py
@@ -93,5 +93,5 @@ class PcscSimLink(LinkBase):
         # Return value
         return i2h(data), i2h(sw)
 
-    def __str__(self):
+    def __str__(self) -> str:
         return "PCSC:%u[%s]" % (self._reader_number,  self._reader)
diff --git a/pySim/transport/serial.py b/pySim/transport/serial.py
index f4b1621e..e5f7bdb9 100644
--- a/pySim/transport/serial.py
+++ b/pySim/transport/serial.py
@@ -237,5 +237,5 @@ class SerialSimLink(LinkBase):
         # Return value
         return b2h(data), b2h(sw)
 
-    def __str__(self):
+    def __str__(self) -> str:
         return "serial:%s" % (self._sl.name)