added printed_exception contextmanager

slic/utils/__init__.py

@@ -5,7 +5,7 @@ from .channels import load_channels, Channels
 from .config import Config
 from .elog import Elog
 from .eval import arithmetic_eval
-from .exceptions import ChainedException, printable_exception
+from .exceptions import ChainedException, printable_exception, printed_exception
 from .ipy import devices
 from .json import json_save, json_load
 from .marker import Marker, markers

slic/utils/exceptions.py

@@ -1,4 +1,5 @@
-from .utils import typename
+from contextlib import AbstractContextManager
+from .utils import typename, singleton
 
 
 class ChainedException(Exception):
@@ -22,3 +23,15 @@ def printable_exception(exc):
 
 
 
+@singleton
+class printed_exception(AbstractContextManager):
+
+   def __exit__(self, exc_type, exc_val, exc_tb):
+        if exc_type is not None:
+            name = exc_type.__name__
+            message = exc_val or ""
+            print("{}: {}".format(name, message))
+        return True # this causes the with statement to suppress the exception
+
+
+