KCExpr 0.0.1

A small mathematics package including an expression parser

KCExpr allows for the parsing of mathematical expressions as strings. KCExpr currently supports 27 mathematical functions, such as summation, products, and trigonometric functions, as well as supporting 37 mathematical constants, such as pi, e, and the golden ratio.

In all cases of KCExpr, the implementation structure is relatively similar. Firstly, declare an object of the KCExpr() class. Next, set the expression of that object. Finally, parse the object. The code blocks below highlight this process, both for single and multiple objects.

Basic implementation

import KCExpr.KCExpr as kce

p = kce.KCExpr()
p.set_expr("1 + 2")
result = p.parse()
print(result)  # prints "3" to the console

Further implementation

import KCExpr.KCExpr as kce

p1, p2 = kce.KCExpr(), kce.KCExpr()
p1.set_expr("1")
p2.set_expr("2")
p3 = p1 + p2
result = p3.parse()
print(result)  # prints "3" to the console

Mathematical functions parsable by KCExpr

The syntax for functions can be found in the docs folder (see GitHub). The following is a list of functions included in the KCExpr class.

• abs, sqrt, root, ncr, npr, sigma, pi, ln, log, sin, sina, csc, sinh, csch, sinha, cos, acos, sec, cosh, sech, cosha, tan, atan, cot, tanh, coth, tanha.

Using mathematical constants in KCExpr

The syntax for mathematical constants can be found in the docs folder (see GitHub). The following is a list of constants included in the KCExpr class.

Constant	Code
Pi	pi
Euler’s Number	e
Euler–Mascheroni constant	em
The golden ratio	golden
Meissel-Mertens constant	mm
Bernstein’s constant	bernstein
Gauss-Kuzmin-Wirsing constant	gkw
Hafner-Sarnak-McCurley constant	hsm
Omega constant	omega
Golomb-Dickman constant	gd
Cahen’s constant	cahen
The twin prime constant	tp
The laplace limit	laplace
Embree-Trefethen constant	et
Landau-Ramanujan constant	lr
Brun’s constant for prime quadruplets	brunpq
Brun’s constant for prime twins	brunpt
Catalan’s constant	catalan
Viswanath’s constant	viswanath
Apéry’s constant	apery
Conway’s constant	conway
Mills’ constant	mills
The plastic number	plastic
Ramanujan-Soldner constant	rs
Backhouse’s constant	backhouse
Porter’s constant	porter
Lieb’s square ice constant	lieb
Erdős–Borwein constant	eb
Niven’s constant	niven
The universal parabolic constant	upc
Feigenbaum’s α constant	feigenbauma
Feigenbaum’s δ constant	feigenbaumd
Sierpinski’s constant	sierpinski
Khinchin’s constant	khinchin
Fransén–Robinson constant	fr
Lévy’s constant	levy
The reciprocal Fibonacci constant	rf