Fix lint errors

Signed-off-by: Bob Haddleton <bob.haddleton@nokia.com>

Author: bobh66

function/fn.py

@@ -2,7 +2,6 @@
 
 import importlib.util
 import inspect
-import sys
 import traceback
 import types
 
@@ -53,7 +52,10 @@ async def RunFunction(
                     else:
                         script.compose(req, rsp)
                 except Exception as e:
-                    msg = f"Exception: {type(e)}, traceback: {traceback.format_tb(e.__traceback__.tb_next)}"
+                    msg = (
+                        f"Exception: {type(e)}, "
+                        f"traceback: {traceback.format_tb(e.__traceback__.tb_next)}"
+                    )
                     log.debug(msg)
                     response.fatal(rsp, msg)
 
@@ -65,7 +67,10 @@ async def RunFunction(
                     else:
                         script.operate(req, rsp)
                 except Exception as e:
-                    msg = f"Exception: {e}, traceback: {traceback.format_tb(e.__traceback__.tb_next)}"
+                    msg = (
+                        f"Exception: {e}, "
+                        f"traceback: {traceback.format_tb(e.__traceback__.tb_next)}"
+                    )
                     log.debug(msg)
                     response.fatal(rsp, msg)
 

tests/test_fn.py

@@ -207,7 +207,8 @@ class TestCase:
                 ),
             ),
             TestCase(
-                reason="Function should fail gracefully when compose script raises an exception.",
+                reason="Function should fail gracefully when compose script raises"
+                " an exception.",
                 req=fnv1.RunFunctionRequest(
                     input=resource.dict_to_struct(
                         {"script": composition_script_with_exception}
@@ -217,7 +218,9 @@ class TestCase:
                     meta=fnv1.ResponseMeta(ttl=durationpb.Duration(seconds=60)),
                     results=[
                         {
-                            "message": "Exception: <class 'AttributeError'>, traceback: ['  File \"<string>\", line 14, in compose\\n']",
+                            "message": "Exception: <class 'AttributeError'>, traceback:"
+                            " ['  File \"<string>\", line 14, in compose\\n'"
+                            "]",
                             "severity": "SEVERITY_FATAL",
                         }
                     ],
@@ -240,7 +243,8 @@ class TestCase:
                 ),
             ),
             TestCase(
-                reason="Function should fail gracefully when async compose script raises an exception.",
+                reason="Function should fail gracefully when async compose script"
+                " raises an exception.",
                 req=fnv1.RunFunctionRequest(
                     input=resource.dict_to_struct(
                         {"script": async_composition_script_with_exception}
@@ -250,7 +254,9 @@ class TestCase:
                     meta=fnv1.ResponseMeta(ttl=durationpb.Duration(seconds=60)),
                     results=[
                         {
-                            "message": "Exception: <class 'AttributeError'>, traceback: ['  File \"<string>\", line 14, in compose\\n']",
+                            "message": "Exception: <class 'AttributeError'>, traceback:"
+                            " ['  File \"<string>\", line 14, in compose\\n'"
+                            "]",
                             "severity": "SEVERITY_FATAL",
                         }
                     ],