jjbeto / pycalc

A Python calculator project to enable to do any simple math express calculation.

Standalone Calculator

A Python calculator project to enable to do any simple math express calculation.

Motivation

I decided to research a bit more complex scenario for my Python studies and I found this peculiar script, the script looks interesting but had some pitfalls, which is interesting for learning 😃 So I decided to take it as an exercise and also produce some interesting ideas for further scenarios to come.

Source

The code was originally developed in conjunction by internet_user and Gareth Rees on StackExchange.

This code has fixed some pitfalls:

• can execute consecutive different operations in the same level (ex. 2 * 2 / 2 = 2)
• can execute operations starting with + and - and also deal with small operations like (-10).

And also has some improvements:

• accepts inputs with spaces and special characters [, ], {, }, –, :, ÷, x, ² and ³.
• some code reviews

How to Use

1. Clone this repository.
2. Execute main.py with an expression as arguments:

$ ./main.py 1 + 1

or

$ python main.py 1 + 1

3. Follow the instructions: input the complete expression as arguments for the script. The result is displayed. (See Supported Operations)

Supported Operations

operator	function
+	addition
- –	subtraction
* x	multiplication
/ : ÷	division
^NUM	exponentiation
² ³	shortcuts for exponentiation to 2 and 3

Requirements

pip3 install -r requirements.txt

or

pip install -r requirements.txt

License

Apache 2.0 license. See more details here.