Calculator

Task

Develop stack-based calculator that can evaluate expressions, find root(s) and calculate integral.

Features

• Verify & evaluate expressions on-the-fly
• Autocompletion & autoformatting input box
• Find root on the specified range (Secants method)
• Calculate integral on the specified range (Simpson's method)

How to run

git clone https://github.com/ZavaruKitsu/stack_calculator
cd stack_calculator

# setup virtual environment
python -m venv venv
pip install -r requirements.txt

# run gui
python main.py

Project structure

main.py

GUI.

tests.py

Tests for evaluator.

src/evaluator

Lexer - transforms given string into the list of lexemes.

Tokenizer - transforms list of lexemes into the list of Tuples as follows: (LEXEME_TYPE, LEXEME).

Converter - transforms list of tokens into the Reverse Polish notation.

Evaluator - stack-based calculator that can evaluate expression or function.

EasyWrapper - wrapper around all above classes, made for ease of use.

src/gui

MathInput - input box that verifies given expression and also points at the error.

MathWindow - just a main window.

OptionsWidget - widget that allows to configure calculator mode.

TitleBarWidget - as well as it sounds.

Credits

• Icons8 for close.svg, minimize.svg