print traceback properly

sql.py

@@ -3,6 +3,8 @@
 import os
 import sys
 import sqlalchemy
+import readline
+import traceback
 
 
 
@@ -134,7 +136,8 @@ while True:
 			for coldata in c2.description:
 				print("%s%s" % (softpad(coldata[0], 40), coldata[1]))
 		except:
-			sys.stdout.write(str(sys.exc_info))
+            traceback.print_exc()
+            sys.stdout.write('\n')
 	elif vl[:4] == 'set ':
 		vs = v[4:]
 		vi = vs.find('=')