@SciPyTip

Tweets about SciPy (Scientific Python) and related topics from @JohnDCook.

 Houston
JohnDCook.com
Joined February 2011
  • Tweets9.3K
  • Following18
  • Followers209K
213Media
Shapely: Geometric objects, predicates, and operations pypi.python.org/pypi/Shapely

shapely

Manipulation and analysis of geometric objects

pypi.org
4
1,534
Distributions in scipy.stats have a method sf for the survival function, i.e. complementary CDF.
6
4,092
Quick linear regression: scipy.stats.linregress(x, y) returns slope, intercept, rvalue, pvalue, stderr.
11
6,332
scipy.optimize contains functions for optimization and root finding
3
4,077
Working around a strange Python problem caused by PEP 723 johndcook.com/blog/2026/10/2…

Working around a strange Python problem | Python PEP 723

Working around a script failure caused by Python PEP 723 following an update

johndcook.com
3
2,727
Scientific Python retweeted
Samuel Colvin
@samuelcolvinOct 22
I read this and I'm terrified, the situation seems intractable. In the python ecosystem alone every cpython install, venv, UV is at risk. Don't get my started on npm, pnpm, yarn, go, rust. My current 2026 security posture: stay home and only connect to the internet from a trusted ISP. The winter is coming. discuss.python.org/t/informa…

Information for Python users regarding eMudhra / emSign CA certificate security incident

A security incident affecting eMudhra intermediate certificates has required removing the emSign root CA certificate from CA bundles such as “certifi”. It’s important to immediately upgrade the...

discuss.python.org
72
372
68
3,279
395,328
Minimally sufficient pandas medium.com/dunder-data/minim…

Minimally Sufficient Pandas

In this article, I will offer an opinionated perspective on how to best use the Pandas library for data analysis. My objective is to argue…

medium.com
1
13
5,465
The incomplete gamma and beta functions in SciPy actually compute REGULARIZED incomplete gamma and beta functions. johndcook.com/blog/gamma_pyt…

Gamma functions in Python

Summary of how to compute the gamma function and related functions in Python using SciPy

johndcook.com
1
11
5,109
Can compute eigenvalues and eigenvectors with linalg.eig().
1
11
6,289
Histogram bin heuristic: numpy.histogram_bin_edges(x, bins='fd') uses Freedman–Diaconis rule.
10
4,637
np.unique returns the unique elements of an array in sorted order.
1
1
16
6,613
np.linalg.pinv computes the Moore-Penrose pseudo inverse of a matrix.
1
15
6,123
Probability distribution parameterizations in SciPy johndcook.com/blog/2010/02/0…

Probability distribution parameterizations in SciPy

Parameterizations are the bane of statistical software. One of the most common errors is to assume that one software package uses the same parameterization as another package. For example, some...

johndcook.com
1
12
4,587
numpy.random.zipf(a, n) generates n samples from a discrete power law with exponent a.
1
10
5,465
np.nan_to_num() replaces nan with 0, inf with max float, and -inf with min float.
1
1
12
6,511
Latin hypercube: scipy.stats.qmc.LatinHypercube(d).random(n) is a solid design-of-experiments default.
12
5,107
openpyxl: a Python library to read/write Excel xlsx/xlsm files pypi.python.org/pypi/openpyx…

openpyxl

A Python library to read/write Excel 2010 xlsx/xlsm files

pypi.org
1
3
25
4,791
Lambert W poster: orcca.on.ca/LambertW/ scipy.special.lambertw
1
4
5,102
linalg.lstsq can solve over-determined linear systems. (lstsq ~ least squares)
1
9
6,513
Approximating a solution that doesn't exist johndcook.com/blog/2009/08/1…

Approximating a solution that doesn't exist | diff eqn

An example of how you can be mislead when trying to compute a solution that doesn't really exist.

johndcook.com
1
8
4,176
Load more