Auxiliary debugging module.
diff --git a/debug.py b/debug.py
new file mode 100644
index 0000000..b425e28
--- /dev/null
+++ b/debug.py
@@ -0,0 +1,36 @@
+'''Debugging utilities.'''
+
+
+import sys
+import traceback
+import inspect
+
+
+def excepthook(type, value, tb):
+ """
+ Automatically start the debugger on an exception.
+
+ See also:
+ - http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/65287
+ """
+
+ if hasattr(sys, 'ps1') \
+ or not (sys.stdin.isatty() and sys.stdout.isatty() and sys.stderr.isatty()) \
+ or type == SyntaxError or type == KeyboardInterrupt:
+ # we are in interactive mode or we don't have a tty-like
+ # device, so we call the default hook
+ oldexcepthook(type, value, tb)
+ else:
+ import traceback, pdb
+ # we are NOT in interactive mode, print the exception...
+ traceback.print_exception(type, value, tb)
+ print
+ # ...then start the debugger in post-mortem mode.
+ pdb.pm()
+
+oldexcepthook, sys.excepthook = sys.excepthook, excepthook
+
+
+def dump(var):
+ sys.stderr.write(repr(var) + '\n')
+