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expr-calc-0.1.2

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مشاهده بیشتر
0.1.2
0.1.1b0
0.1.1
0.1.0
0.1.2
0.1.1b0
0.1.1
0.1.0

توضیحات

Expression interpreter modeled after a calculator
ویژگی مقدار
سیستم عامل -
نام فایل expr-calc-0.1.2
نام expr-calc
نسخه کتابخانه 0.1.2
نگهدارنده []
ایمیل نگهدارنده []
نویسنده lestherll
ایمیل نویسنده ljllacuna5@gmail.com
آدرس صفحه اصلی https://github.com/lestherll/expr_calc
آدرس اینترنتی https://pypi.org/project/expr-calc/
مجوز MIT
# Calc Interpreter [![Python Package](https://github.com/lestherll/calc/actions/workflows/main.yml/badge.svg)](https://github.com/lestherll/calc/actions/workflows/main.yml) [![other branches](https://github.com/lestherll/expr_calc/actions/workflows/test_other_branch.yml/badge.svg?branch=arbitrary-precision)](https://github.com/lestherll/expr_calc/actions/workflows/test_other_branch.yml) [![Python Version](https://img.shields.io/pypi/pyversions/expr-calc?style=plastic)](https://pypi.org/project/expr-calc/) [![Python Implementation](https://img.shields.io/pypi/implementation/expr-calc?style=plastic&color=green)](https://python.org/downloads) An interpreter modeled after a calculator implemented in Python 3. The program currently only supports basic mathematical expressions. The package uses Reverse Polish Notation also known as postfix expression internally to easily represent mathematical expressions. This is powerful as it allows operators to be *organised* in such a way that precedence is *absolute* meaning an operator that is encountered first will always be executed first. However, it is obvious that postfix is not *normal* or rather not usually taught in schools and thus infix expression is still the way for the user to write expressions. The interpreter uses a modified Shunting-Yard algorithm to produce Abstract Syntax Trees. Evaluation of ASTs is trivial, and they are flexible making it easy to extend the grammar and functionality later on. ## Installation The package is available in PyPI and can be installed via pip. ```shell pip install expr-calc #or python3 -m pip install expr-calc ``` ## Usage The best way to run the program currently is to execute the REPL and can be done in a python file or through your terminal. Assuming your present working directory is inside the cloned repo, you can run the following command without the comment. ```shell # inside /clone_path/expr_calc/ python -m expr_calc ``` The test suite can also be ran with `pytest` when inside the cloned repo ```shell pytest # or python -m pytest ``` ## Example Once inside the REPL, you can start evaluating expressions. Currently, only operators listed in [Features](#features) are supported. ```shell calc> 1 + 1 2 calc> 345--500 845 calc> -2 -2 calc> 123 ^ 4 228886641 calc> 32 / 1.5 21.33333333333333333333333333 calc> 123 * 456 56088 calc> 34 % 5 4 calc> 4 ^ 1/2 0.5 calc> 4 ^ (1/2) 2.0 ``` ## Features - Infix expressions - Basic operators such as `+, -, *, /, %, ^` - Tokens created from an expression can also be fetched to be manipulated if one wanted to do so - Expressions are transformed into m-ary Tree objects connected to each other ### Features I want to add later - variable support - custom functions - more mathematical functions such as `sin`, `cos`, `tan`, etc - and possibly a simple symbolic computation support ## Resources - [Reverse Polish Notation](https://en.wikipedia.org/wiki/Reverse_Polish_notation) - [Shunting Yard Algorithm](https://en.wikipedia.org/wiki/Shunting-yard_algorithm) - [Floating-point arithmetic](https://floating-point-gui.de/formats/fp/) - [Calculator test suite](https://mozilla.github.io/calculator/test/)


زبان مورد نیاز

مقدار نام
>=3.7,<4.0 Python


نحوه نصب


نصب پکیج whl expr-calc-0.1.2:

    pip install expr-calc-0.1.2.whl


نصب پکیج tar.gz expr-calc-0.1.2:

    pip install expr-calc-0.1.2.tar.gz