Merge pull request #13 from AshokThangavel/py-cls-exce-code-sample

CodeSample: add Python error handling by extracting last traceback fr…

Author: evshvarov

src/dc/python/test.cls

@@ -61,7 +61,7 @@ ClassMethod DivideByZeroPython() [ Language = python ]
         stack_trace_list = traceback.format_tb(e.__traceback__)
         if stack_trace_list:
             last_instruction_line = stack_trace_list[-1].strip()
-            errobj.Location = last_instruction_line 
+            errobj.Location = last_instruction_line
         errobj.Log()
         print("Caught exception: " +str(e))
 }
@@ -77,17 +77,99 @@ ClassMethod DivideByZeroPython2() [ Language = python ]
     except ZeroDivisionError as e:
         tb = e.__traceback__
         last_frame = traceback.extract_tb(tb)[-1]
-    
+
         # 2. Extract specific parts
         error_name = f"<{type(e).__name__.upper()}>" # e.g., <NAMEERROR>
         line_no = last_frame.lineno               # e.g., 6
         func_name = last_frame.name               # e.g., <module> or my_func
-        filename = os.path.basename(last_frame.filename).replace('.py', '') 
-    
+        filename = os.path.basename(last_frame.filename).replace('.py', '')
+
         iris_error = f"{func_name}+{line_no}^{filename}"
         errobj=iris.cls("%Exception.General")._New(error_name,2603,iris_error)
         errobj.Log()
         print("Caught exception: " +str(e))
 }
 
+ClassMethod DivideByZeroPythonWithInCls() [ Language = python ]
+{
+    import traceback
+    import iris
+
+    class MathOperations:
+        def divide_numbers(self):
+            try:
+                print(1/0)
+            except Exception as e:
+                tb = e.__traceback__
+                stack = traceback.extract_tb(tb)[-1]
+
+                error_name = f"<{type(e).__name__.upper()}>"
+                cls_name = self.__class__.__name__
+                func_name = stack[2]
+                line_no = stack[1]
+                # create IRIS format error string
+                iris_error = f"{func_name}+{line_no}^{cls_name}"
+                python_exception= 2603
+                errobj=iris.cls("%Exception.General")._New(error_name, python_exception, iris_error)
+                a=errobj.Log()
+                print("Caught exception: " + str(e))
+
+    obj = MathOperations()
+    obj.divide_numbers()
+}
+
+/// Pass the python exception to IRIS class to store the error in error log
+ClassMethod PYExecCaptureInIRIS() [ Language = python ]
+{
+    import traceback
+    import iris
+
+    class MathOperations:
+        def divide_numbers(self):
+            try:
+                print(1/0)
+            except Exception as e:
+                status = iris.cls(__name__).ConvertPyExceToIRISFormat(e)
+
+    obj = MathOperations()
+    obj.divide_numbers()
+}
+ClassMethod PYFuncExecCaptureInIRIS() [ Language = python ]
+{
+    import traceback
+    import iris
+
+    def divide_numbers():
+        try:
+            print(1/0)
+        except Exception as e:
+            status = iris.cls(__name__).ConvertPyExceToIRISFormat(e)
+
+    divide_numbers()
+}
+/// Convert Python Exception to IRIS Exception Format and log it
+ClassMethod ConvertPyExceToIRISFormat(pyException)
+{
+	Set pyBuiltins = ##class(%SYS.Python).Builtins()
+	Set ex = pyBuiltins.type(pyException)
+	Set error = $Property(ex, "__name__")
+	Set error = "<"_$ZCVT(error,"U")_">"
+
+	Set traceback = ##class(%SYS.Python).Import("traceback")
+
+	Set tb = $Property(pyException, "__traceback__")
+	Set frames = $Method(traceback,"extract_tb",tb)
+	Set lastFrame = $Method(frames,"__getitem__",-1)
+
+	Set file= $Property(lastFrame,"filename")
+	set line= $Property(lastFrame,"lineno")
+	set function= $Property(lastFrame,"name")
+	Set code = $Property(lastFrame,"line")
+
+	Set msg = function_"+"_line_"^"_file
+
+	Set generalExcep = ##class(%Exception.General).%New(error,2603,msg)
+	Do generalExcep.Log()
+}
+
 }