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New posts in python-internals
Why is integer divisions not optimised when compiling to bytecode?
Mar 22, 2023
python
bytecode
python-internals
Python: equality for Nan in a list?
Mar 19, 2023
python
cpython
python-internals
globals() vs locals() mutability
Mar 19, 2023
python
state
python-internals
mutability
Why round off of 0.500000 in python differs from 45.500000 using '%.0f'?
Mar 17, 2023
python
python-3.x
python-2.7
string-formatting
python-internals
Are simple hardcoded arithmetics cached/compiled away?
Mar 15, 2023
python
python-internals
How __future__ imports work under the hood
Mar 09, 2023
python
python-2.7
import
python-internals
compiler-directives
Fraction object doesn't have __int__ but int(Fraction(...)) still works
Feb 11, 2023
python
int
fractions
python-internals
How does Python's reversed() function work?
Jan 30, 2023
python
cpython
python-internals
Why doesn't 1 + 1 use BINARY_ADD?
Jan 11, 2023
python
python-2.7
python-internals
What's the logic behind Python's hash function order?
Jan 11, 2023
python
python-3.x
python-2.7
hashtable
python-internals
Why does Python's CONTINUE_LOOP allow an outer loop, when BREAK_LOOP doesn't?
Jan 06, 2023
python
loops
bytecode
cpython
python-internals
What are these extra symbols in a comprehension's symtable?
Jan 05, 2023
python
python-3.x
list-comprehension
python-internals
Definition of math_sin function in the CPython source code?
Jan 03, 2023
python
cpython
python-internals
Why can't I use inspect.getsource() to view the source for list?
Dec 22, 2022
python
list
introspection
python-internals
Is the empty tuple in Python a "constant" [duplicate]
Dec 20, 2022
python
memory
tuples
python-internals
How Python dictionaries are executed?
Dec 20, 2022
python
dictionary
input
python-internals
Why doesn't Python optimize away temporary variables?
Dec 13, 2022
python
optimization
refactoring
python-internals
why python dict update insanely slow?
Dec 10, 2022
python
performance
dictionary
cpython
python-internals
Why does Python's grammar specification not include docstrings and comments?
Dec 08, 2022
python
grammar
python-internals
In Python 3.12, why does 'Öl' take less memory than 'Ö'?
Sep 02, 2025
python
string
python-internals
python-3.12
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