From what I've read about cpython it seems like it does reference counting + something extra to detect/free objects pointing to each other.(Correct me if I'm wrong). Could someone explain the something extra? Also does this guarantee* no cycle leaking? If not is there any research into an algorithm proven to add to reference counting to ...
Why does CPython (no clue about other Python implementations) have the following behavior? tuple1 = () tuple2 = () dict1 = {} dict2 = {} list1 = [] list2 = [] # makes sense, tuples are immutable assert(id(tuple1) == id(tuple2)) # also make...
Hi. I would like to convert numpy array to some double* or stl vector on the c++ side. I'm actually using PyCXX for this and I can't figure out the way to access the data. I'm currently able to access and return the data buffer like this : Py::Object arrayShape(const Py::Tuple& args ){ Py::Object array= args[0]; return arra...
I've seen people say that set objects in python have O(1) membership-checking. How are they implemented internally to allow this? What sort of data structure does it use? What other implications does that implementation have? Every answer here was really enlightening, but I can only accept one, so I'll go with the closest answer to my o...
I made a c extension out of a python script that was fairly labour intensive. The code itself is well tested and simple. The c extension is called with a few large lists, and it then performs some clever arithmetic and returns a few new lists. The c extension is 100% self sufficient, it doesn't use any other c functions nor does it use a...
I'm trying to save myself just a few keystrokes for a command I type fairly regularly in Python. In my python startup script, I define a function called load which is similar to import, but adds some functionality. It takes a single string: def load(s): # Do some stuff return something In order to call this function I have to ty...