Why can tuples contain mutable items?
If a tuple is immutable then why can it contain mutable items? It is seemingly a contradiction that when a mutable item such … Read more
python-internals
Finding the source code for built-in Python functions?
Is there a way to see how built in functions work in python? I don’t mean just how to use them, but also … Read more
Accessing class variables from a list comprehension in the class definition
How do you access other class variables from a list comprehension within the class definition? The following works in Python 2 but fails … Read more
How is Python’s List Implemented?
Is it a linked list, an array? I searched around and only found people guessing. My C knowledge isn’t good enough to look … Read more
What is the global interpreter lock (GIL) in CPython?
What is a global interpreter lock and why is it an issue? A lot of noise has been made around removing the GIL … Read more
How does asyncio actually work?
This question is motivated by my another question: How to await in cdef? There are tons of articles and blog posts on the … Read more
Why is ‘x’ in (‘x’,) faster than ‘x’ == ‘x’?
>>> timeit.timeit(“‘x’ in (‘x’,)”) 0.04869917374131205 >>> timeit.timeit(“‘x’ == ‘x'”) 0.06144205736110564 Also works for tuples with multiple elements, both versions seem to grow linearly: … Read more
Are tuples more efficient than lists in Python?
Is there any performance difference between tuples and lists when it comes to instantiation and retrieval of elements? 9 Answers 9
Why are some float < integer comparisons four times slower than others?
When comparing floats to integers, some pairs of values take much longer to be evaluated than other values of a similar magnitude. For … Read more
time.sleep — sleeps thread or process?
In Python for *nix, does time.sleep() block the thread or the process? 7 Answers 7