We're back after a server migration that caused effbot.org to fall over a bit harder than expected. Expect some glitches.

sys._getframe

_getframe([depth])

Return a frame object from the call stack. If optional integer depth is given, return the frame object that many calls below the top of the stack. If that is deeper than the call stack, ValueError is raised. The default for depth is zero, returning the frame at the top of the call stack.

This function should be used for internal and specialized purposes only.