Typst Sympy Calculator

About

Typst Sympy Calculator parses Typst Math Expressions and converts it into the equivalent SymPy form. Then, calculate it and convert to typst math text.

It is designed for providing people writing in typst a ability to calculate something when writing math expression. It is based on Sympy module in Python.

The typst-sympy-calculator python package is a backend for a VS Code extension Typst Sympy Calculator, and you also can use it just for parse typst math expression to sympy form in order to do things for yourself.

Features

• Default Math:
  • Arithmetic: Add (+), Sub (-), Dot Mul (dot), Cross Mul (times), Frac (/), Power (^), Abs (|x|), Sqrt (sqrt), etc...
  • Alphabet: a - z, A - Z, alpha - omega, Subscript (x_1), Accent Bar(hat(x)), etc...
  • Common Functions: gcd, lcm, floor, ceil, max, min, log, ln, exp, sin, cos, tan, csc, sec, cot, arcsin, sinh, arsinh, etc...
  • Funcion Symbol: f(x), f(x-1,), g(x,y), etc...
  • Calculous: Limit lim_(x -> oo) 1/x, Integration integral_1^2 x dif x, etc...
  • Calculous: Derivation (dif/(dif x) (x^2 + 1) is not supported, but you can use derivative(expr, var) instead), etc...
  • Reduce: Sum sum_(k=1)^oo (1/2)^k, Product product_(k=1)^oo (1/2)^k, etc...
  • Eval At: Evalat x^2 bar_(x = 2), x^2 "|"_(x = 2), etc...
  • Linear Algebra: Matrix to raw echelon form rref, Determinant det, Transpose ^T, Inverse ^(-1), etc...
  • Relations: ==, >, >=, <, <=, etc...
  • Solve Equation: Single Equation x + 1 = 2, Multiple Equations cases(x + y = 1, x - y = 2), etc...
  • Logical: and, or, not, etc...
  • Set Theory: in, sect, union, subset, etc...
  • Other: Binomial binom(n, k) ...
• Custom Math (in typst file):
  • Define Accents: #let acc(x) = math.accent(x, math.grave)
  • Define Operators: #let add = math.op("add")
  • Define Symbols: #let xy = math.italic("xy") or #let mail = symbol("🖂", ("stamped", "🖃"),)
  • Define Functions:

    # typst-calculator
    @func()
    def convert_add(a, b):
        return a + b

• Typst Math Printer:
  • Complete TypstMathPrinter in TypstConverter.py
  • Custom Printer for TypstCalculator.py and TypstCalculatorServer.py
• VS Code Extension:
  • Develop a VS Code Extension for Typst Calculator

Install

pip install typst-sympy-calculator

Usage

Difference Between parse, converter, calculator, server

• TypstParser.py: parse typst math expression to ANTLR abstract syntax tree with TypstGrammar.g4;
• TypstConverter.py:
  • convert typst math expression to sympy expression via TypstMathConverter;
  • convert sympy expression to typst math expression via TypstMathPrinter;
  • has decorators for defining custom functions, operators;
  • has define_accent, define_symbol_base and define_function for defining custom accents, symbols and functions;
• TypstCalculator.py:
  • calculate sympy expression and convert to typst math expression;
  • has subs, simplify, evalf methods;
  • has set_variance and unset_variance for calculating with variance;
• DefaultTypstCalculator: define many useful functions, operators, accents, symbols;
  • Accents, Alphabet, Greeks, Arithmetic, Common Functions, Calculous, Linear Algebra, etc...
• TypstCalculatorServer:
  • has init method for initializing TypstCalculator with a typst file;
  • can define your custom functions on your typst file;
  • has simplify, subs, evalf methods for calculating with typst file;

It is a top-down design, so you can use TypstCalculatorServer directly, or use TypstCalculator with TypstConverter.

RECOMMEND: see the usage of decorators like @func() in DefaultTypstCalculator.py.

For the usage, you can see the unit test part if __name__ == '__main__': in each files.

Sympy Expressions and Typst Math Text

from TypstCalculatorServer import TypstCalculatorServer

server = TypstCalculatorServer()
typst_math = r'1 + 1'
expr = server.sympy(typst_math)
print(server.typst(expr))

from TypstCalculator import TypstCalculator

calculator = TypstCalculator()
typst_math = r'1 + 1'
expr = calculator.sympy(typst_math)
print(calculator.typst(expr))

from TypstConverter import TypstMathConverter

converter = TypstMathConverter()
typst_math = r'1 + 1'
expr = converter.sympy(typst_math)
print(converter.typst(expr))

Typst Calculator Server

The simplest way to use it is just like TypstCalculatorServer.py:

from TypstCalculatorServer import TypstCalculatorServer

server = TypstCalculatorServer()
typst_file = os.path.abspath(r'./tests/test.typ')
server.init(typst_file)
server.return_text = True  # otherwise just return sympy form
expr = server.simplify('1 + 1', typst_file)
print(expr)  # 2
server.enable_subs = False
expr = server.simplify('a + 1', typst_file)
print(expr)  # a + 1
server.enable_subs = True
expr = server.simplify('a + 1', typst_file)
print(expr)  # 2
expr = server.simplify('b + 1', typst_file)
print(expr)  # a + 2
expr = server.simplify('cmat(1, 2)', typst_file)
print(expr)  # mat(1; 2)
expr = server.simplify('f(1) + f(1)', typst_file)
print(expr)  # 2 f(1)
expr = server.simplify('xy + mail + mail.stamped', typst_file)
print(expr)  # mail + mail.stamped + xy
expr = server.solve('x + y + z = 1')
print(expr)  # y = -x - z + 1, z = -x - y + 1, x = -y - z + 1
expr = server.solve('cases(x + y + z = 1, x = 2)')
print(expr)  # cases(x = 2, z = -y - 1), cases(y = -z - 1, x = 2), y = -x - z + 1, z = -x - y + 1
expr = server.solve('cases(x^2 + y = 4, y = 2)')
print(expr)  # x = sqrt(4 - y), cases(y = 2, x = sqrt(2)), cases(y = 2, x = -sqrt(2)), x = -sqrt(4 - y)
expr = server.solve('cases(x < 2, x > 1)')
print(expr)  # 1 < x and x < 2

and the typst files tests/test.typ

#import "cal.typ": *

// set variances
#let a = 1
#let b = $a + 1$

and tests/cal.typ just like:

// define accents
#let acc(x) = math.accent(x, math.grave)

// define operators
#let add = math.op("add")
#let f = math.op("f")

// define symbols
#let xy = math.italic("xy")
#let mail = symbol("🖂", ("stamped", "🖃"),)

Default Typst Calculator

If you have not a typst file, you can use DefaultTypstCalculator.py, it define many useful functions and symbols just like:

# Symbols
abc = 'abcdefghijklmnopqrstuvwxyz'
for c in abc:
    calculator.define_symbol_base(c)
    calculator.define_symbol_base(c.upper())

# Functions
@func()
def convert_sin(expr):
    return sympy.sin(expr)

So you can use it by:

from DefaultTypstCalculator import get_default_calculator

calculator = get_default_calculator(complex_number=True)
calculator.return_text = True
operator, relation_op, additive_op, mp_op, postfix_op, \
    reduce_op, func, func_mat, constant = calculator.get_decorators()
expr = calculator.simplify('1 + 1')
assert expr == '2'
expr = calculator.evalf('1/2', n=3)
assert expr == '0.500'
calculator.set_variance('a', '1/2')
expr = calculator.simplify('a + 1')
assert expr == '3/2'
calculator.unset_variance('a')
expr = calculator.simplify('a + 1')
assert expr == 'a + 1' or expr == '1 + a'
expr = calculator.evalf('pi', n=3)
assert expr == '3.14'
expr = calculator.simplify('max(1, 2)')
assert expr == '2'
calculator.define_function('f')
expr = calculator.simplify('f(1) + f(1) - f(1)')
assert expr == 'f(1)'
expr = calculator.simplify('lim_(x -> oo) 1/x')
assert expr == '0'

Variances

You can ASSIGN variance a value using same assignment form in typst:

#let x = 1

// Before
$ x $

// Shift + Ctrl + E
// After
$ x = 1 $

PS: You can use grammar like y == x + 1 to describe the relation of equality.

If you want to see the bonding of variances, you can press Shift + Ctrl + P, and input typst-sympy-calculator: Show Current variances, then you will get data like:

y = x + 1
z = 2 x

Functions

You can DEFINE a function using same form in typst:

#let f = math.op("f")

// Before
$ f(1) + f(1) $

// Shift + Ctrl + E
// After
$ f(1) + f(1) = 2 f(1) $

Symbols

You can DEFINE a symbol using same form in typst:

#let xy = math.italic("xy")
#let email = symbol("🖂", ("stamped", "🖃"),)

$ xy + email + email.stamped $

Accents

You can DEFINE a accent using same form in typst:

#let acc(x) = math.accent(x, math.grave)

$ acc(x) $

Decorators for Operators

You can DEFINE a operator using same form in typst:

#let add = math.op("+")

'''typst-calculator
@additive_op()
def convert_add(a, b):
    return a + b
'''

// Before
$ 1 add 1 $

// Shift + Ctrl + E
// After
$ 1 add 1 = 2 $

Or just use '''typst-sympy-calculator or '''python \n # typst-calculator to define a operator.

there are some decorators you can use:

• @operator(type='ADDITIVE_OP', convert_ast=convert_ast, name=name, ast=False): Define a common operator;
• @func(): Define a function, receive args list;
• @func_mat(): Define a matrix function, receive single arg matrix;
• @constant(): Define a constant, receive no args but only return a constant value;
• @relation_op(): Define a relation operator, receive args a and b;
• @additive_op(): Define a additive operator, receive args a and b;
• @mp_op(): Define a multiplicative operator, receive args a and b;
• @postfix_op(): Define a postfix operator, receive args a;
• @reduce_op(): Define a reduce operator, receive args expr and args = (symbol, sub, sup);

It is important that the function name MUST be def convert_{operator_name}, or you can use decorator arg @func(name='operator_name'), and the substring _dot_ will be replaced by ..

There are some examples (from DefaultTypstCalculator.py):

# Functions
@func()
def convert_binom(n, k):
    return sympy.binomial(n, k)

# Matrix
@func_mat()
def convert_mat(mat):
    return sympy.Matrix(mat)

# Constants
@constant()
def convert_oo():
    return sympy.oo

# Relation Operators
@relation_op()
def convert_eq(a, b):
    return sympy.Eq(a, b)

# Additive Operators
@additive_op()
def convert_plus(a, b):
    return a + b

# Mp Operators
@mp_op()
def convert_times(a, b):
    return a * b

# Postfix Operators
@postfix_op()
def convert_degree(expr):
    return expr / 180 * sympy.pi

# Reduces
@reduce_op()
def convert_sum(expr, args):
    # symbol, sub, sup = args
    return sympy.Sum(expr, args)

Contributing

1. Clone it by git clone https://github.com/OrangeX4/typst-calculator.git
2. Install dependencies by pip install -r requirements.txt
3. Compile ANTLR grammar by python ./scripts/compile.py
4. Debug or add your code with TypstCalculatorServer.py or TypstCalculator.py, etc...

It is welcome to create an issue or pull request.

Thanks

• augustt198 / latex2sympy
• purdue-tlt / latex2sympy
• ANTLR
• Sympy

License

This project is licensed under the MIT License.