refactor: use explicit conversion in f-strings

gns3server/compute/docker/docker_vm.py

@@ -1468,7 +1468,7 @@ class DockerVM(BaseNode):
                     pass
         # Ignore runtime error because when closing the server
         except RuntimeError as e:
-            log.debug(f"Docker runtime error when closing: {str(e)}")
+            log.debug(f"Docker runtime error when closing: {e!s}")
             return
         self.status = "stopped"
 
@@ -1571,7 +1571,7 @@ class DockerVM(BaseNode):
                                 self.manager.port_manager.release_udp_port(nio.lport, self._project)
         # Ignore runtime error because when closing the server
         except (DockerHttp404Error, RuntimeError) as e:
-            log.debug(f"Docker error when closing: {str(e)}")
+            log.debug(f"Docker error when closing: {e!s}")
             return
 
     def _get_container_ifname(self, adapter_number):
@@ -1775,7 +1775,7 @@ class DockerVM(BaseNode):
 
         for index in range(4096):
             if f"tap-gns3-e{index}" not in psutil.net_if_addrs():
-                adapter.host_ifc = f"tap-gns3-e{str(index)}"
+                adapter.host_ifc = f"tap-gns3-e{index!s}"
                 break
         if adapter.host_ifc is None:
             raise DockerError(

gns3server/compute/dynamips/nodes/router.py

@@ -97,7 +97,7 @@ class Router(BaseNode):
         try:
             os.makedirs(os.path.join(self._working_directory, "configs"), exist_ok=True)
         except OSError as e:
-            raise DynamipsError(f"Can't create the dynamips config directory: {str(e)}")
+            raise DynamipsError(f"Can't create the dynamips config directory: {e!s}")
         if dynamips_id:
             self._convert_before_2_0_0_b3(dynamips_id)
 
@@ -153,7 +153,7 @@ class Router(BaseNode):
                 try:
                     shutil.move(path, dst)
                 except OSError as e:
-                    log.error(f"Can't move {path}: {str(e)}")
+                    log.error(f"Can't move {path}: {e!s}")
                     continue
         for path in glob.glob(os.path.join(glob.escape(dynamips_dir), f"*_i{dynamips_id}_*")):
             dst = os.path.join(self._working_directory, os.path.basename(path))
@@ -161,7 +161,7 @@ class Router(BaseNode):
                 try:
                     shutil.move(path, dst)
                 except OSError as e:
-                    log.error(f"Can't move {path}: {str(e)}")
+                    log.error(f"Can't move {path}: {e!s}")
                     continue
 
     def asdict(self):
@@ -1608,7 +1608,7 @@ class Router(BaseNode):
         try:
             open(output_file, "w+").close()
         except OSError as e:
-            raise DynamipsError(f'Can not write capture to "{output_file}": {str(e)}')
+            raise DynamipsError(f'Can not write capture to "{output_file}": {e!s}')
 
         try:
             adapter = self._slots[slot_number]