make AsStream public

satella/exception_handling/__init__.py

+from .dump_to_file import *
+from .exception_handlers import *
+from .global_eh import *
+
+
 __all__ = [
     'GlobalExcepthook',
     'BaseExceptionHandler', 'exception_handler', 'FunctionExceptionHandler',
     'NORMAL_PRIORITY', 'ALWAYS_LAST', 'ALWAYS_FIRST',
-    'DumpToFileHandler'
+    'DumpToFileHandler', 'AsStream'
 ]
 
-from .dump_to_file import *
-from .exception_handlers import *
-from .global_eh import *

satella/exception_handling/dump_to_file.py

@@ -13,7 +13,7 @@ from .exception_handlers import BaseExceptionHandler
 logger = logging.getLogger(__name__)
 
 __all__ = [
-    'DumpToFileHandler'
+    'DumpToFileHandler', 'AsStream'
 ]
 
 AsStreamTypeAccept = tb.Union[str, tb.IO, None]
@@ -84,8 +84,8 @@ class DumpToFileHandler(BaseExceptionHandler):
         :param trace_pickles: iterable of either a file-like objects, or paths where pickles with stack status will be output
         """
         super(DumpToFileHandler, self).__init__()
-        self.hr = [AsStream(x, True) for x in human_readables]
-        self.tp = [AsStream(x, False) for x in trace_pickles]
+        self.hr = [AsStream(x, True) if not isinstance(x, AsStream) else x for x in human_readables]
+        self.tp = [AsStream(x, False) if not isinstance(x, AsStream) else x for x in trace_pickles]
 
     def handle_exception(self, type_, value, traceback):
         try: