Scientific Python

SymPy: a Python library for symbolic mathematics sympy.org

Integrate from samples: scipy.integrate.simpson(y, x=x) supports uneven x and is a modern replacement for simps.

Singular value decomposition and pseudoinverse johndcook.com/blog/2018/05/0…

numpy.var calculates population variance by default. With optional parameter ddof=1 it computes sample variance.

Permute a list x in place: np.random.shuffle(x)

matplotlib color abbreviations: each of the letters in 'rgb' and 'cymk' plus 'w' for white.

To issue a shell command in IPython, prefix the command with !

Python's sys.float_info is analogous to C's float.h header.

scipy.integrate has three routines for computing integrals from samples: trapz (trapezoid), simps (Simpson's), romb (Romberg).

Wagon's algorithm in Python Solving the equation x² + y² = p where p is an odd prime. johndcook.com/blog/2026/02/1…

Data fitting using fmin glowingpython.blogspot.com/2011/05/curve-…

scipy.special has functions sindg, cosdg, and tandg for computing trig functions of arguments in degrees.

Gauss' original hypergeometric function, now known as 2F1, is implemented in scipy.special.hyp2f1.

Guide to NumPy Indexing quansight-labs.github.io/ndindex/indexi…

How to use regular expressions in Pandas kanoki.org/2019/11/12/how…

FiPy is a Finite Volume PDE solver written in Python ctcms.nist.gov/fipy

The function scipy.special.psi is the derivative of the logarithm of scipy.special.gamma.

The confluent hypergeometric function is implemented in scipy.special.hyp1f1.

How to create green noise in Python with a Butterworth filter johndcook.com/blog/2016/04/2…

The function numpy.empty() creates an array without initializing its elements.