sql_db: Avoid using inspect.stack(), use failsafe alternative.

Inspecting the full stack just to learn the file:line info for debugging
purposes is both expensive and error-prone. Write an alternative function
in tools/func.py that will just go N frames back and try to get the info.

bzr revid: p_christ@hol.gr-20101123135742-2jp75f3uxyg3a6b6

1 files changed, 3 insertions, 3 deletions

diff --git a/bin/sql_db.py b/bin/sql_db.py
index 6c2c17beeb3..cdc3d0de4b3 100644
--- a/bin/sql_db.py
+++ b/bin/sql_db.py
@@ -51,11 +51,11 @@ psycopg2.extensions.register_type(psycopg2.extensions.new_type((700, 701, 1700,)
 
 
 import tools
-from tools.func import wraps
+from tools.func import wraps, frame_codeinfo
 from datetime import datetime as mdt
 from datetime import timedelta
 import threading
-from inspect import stack
+from inspect import currentframe
 
 import re
 re_from = re.compile('.* from "?([a-zA-Z_0-9]+)"? .*$');
@@ -93,7 +93,7 @@ class Cursor(object):
         self._obj = self._cnx.cursor(cursor_factory=psycopg1cursor)
         self.__closed = False   # real initialisation value
         self.autocommit(False)
-        self.__caller = tuple(stack()[2][1:3])
+        self.__caller = frame_codeinfo(currentframe(),2)
 
     def __del__(self):
         if not self.__closed: