On Jul 8, 2009, at 1:35 PM, Paul LaFollette wrote:
I cannot figure out any way to get a hook into the local namespace of a user defined function. I have tried making a wrapper class that grabs the function call and then uses exec to invoke myfunction.__code__ with my own dictionaries. This runs the (no argument) function properly (losing the return value, but I can deal with that) but never accesses the local logging dictionary that I specify in the exec() call. Perhaps the local namespace of a function is not a dict at all?
Right. Within functions, local variable name accesses and assignments are compiled into bytecode instructions (LOAD_FAST, STORE_FAST) that manipulate pointers to objects by indexing directly into a C array in the frame. The "locals" dictionary of a frame is generated on-demand from that array when accessed. There is no way that I'm aware of to directly hook into function namespace access and manipulation.
-Miles -- http://mail.python.org/mailman/listinfo/python-list
