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I want to show someone how using is instead of == to compare integers can fail. I thought this wou… Read more How To Create The Int 1 At Two Different Memory Locations?

I've been trying to learn to use CPython and for it, I tried creating a simple factorial functi… Read more Error When Compiling Cpython: Cannot Convert From Pylongobject To Pyobject

It is clear to me that None is used to signify the lack of a value. But since everything must have … Read more Value Of Py_none

I've been looking through the code of the os module (just to be clear, I'm looking at the f… Read more Python: Where Is The Code For Os.mkdir?

The Question Why, in CPython, does def add_string(n): s = '' for _ in range(n): … Read more Cpython String Addition Optimisation Failure Case

I have built a Python C++ module based on Python 3.4.3. Later I have installed Python 3.5, and trie… Read more Backward Compatibility Of Python 3.5 For External Modules

In doing some bioinformatics work, I've been pondering the ramifications of storing object inst… Read more Storing Python Objects In A Python List Vs. A Fixed-length Numpy Array

The following example script writes some strings to a file using either 'w', text, or '… Read more In Python 2.7 Why Are Strings Written Faster In Text Mode Than In Binary Mode?