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New posts in python-internals
Why is str.strip() so much faster than str.strip(' ')?
Sep 02, 2022
python
string
performance
python-3.x
python-internals
What does "del" do exactly?
Aug 17, 2022
python
memory
python-internals
Why is float() faster than int()?
Sep 02, 2022
python
python-2.7
performance
python-internals
Why is repr(int) faster than str(int)?
Oct 16, 2022
python
performance
python-internals
Why is True returned when checking if an empty string is in another?
Sep 02, 2022
python
string
python-internals
Understanding memory allocation for large integers in Python
Oct 09, 2022
python
python-3.x
int
python-internals
Tuple or list when using 'in' in an 'if' clause?
Sep 01, 2022
python
list
optimization
tuples
python-internals
Why is list(x for x in a) faster for a=[0] than for a=[]?
Sep 05, 2022
python
performance
cpython
python-internals
How big can the input to the input() function be?
Sep 01, 2022
python
string
python-3.x
function
python-internals
Why does list ask about __len__?
Aug 31, 2022
python
list
python-internals
What is under the hood of x = 'y' 'z' in Python?
Feb 21, 2022
python
string
syntax
concatenation
python-internals
Is there a difference between [] and list() when using id()?
Sep 12, 2022
python
list
python-internals
Are list comprehensions syntactic sugar for `list(generator expression)` in Python 3?
Aug 31, 2022
python
python-3.x
list-comprehension
python-internals
generator-expression
Why are reversed and sorted of different types in Python?
Aug 31, 2022
python
types
python-internals
Is there anything faster than dict()?
Sep 12, 2022
python
python-3.x
numpy
dictionary
python-internals
Why were literal formatted strings (f-strings) so slow in Python 3.6 alpha? (now fixed in 3.6 stable)
Aug 30, 2022
python
performance
python-internals
python-3.6
f-string
How does swapping of members in tuples (a,b)=(b,a) work internally?
Aug 30, 2022
python
tuples
python-internals
iterable-unpacking
Meaning of unittest.main() in Python unittest module
Nov 02, 2022
python
unit-testing
python-internals
Why are dict lookups always better than list lookups?
Aug 30, 2022
python
performance
optimization
big-o
python-internals
Python eval: is it still dangerous if I disable builtins and attribute access?
Aug 30, 2022
python
eval
python-internals
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