Strategy Pattern Calculator

Python implementation of a command line calculator using the strategy design pattern

Description

This is a simple command-line calculator that can perform basic arithmetic operations. The calculator is implemented using the strategy design pattern. The calculator can perform the following operations:

Addition
Subtraction
Multiplication
Division

Setup tool is configured to build and use as a CLI.

Further, Business logic is exposed as a pip package spcalc

To be implemented:

Exponentiation
Square root
Logarithm

Getting Started

Installing

Clone the repository

git clone https://github.com/yrangana/Strategy_Pattern_Calculator.git

Install the dependencies

make install

Executing program in Python

Run the calculator with prompts

python src/main.py

Run the calculator with arguments

python src/main.py -n1 <first number> -n2 <second number> -op <operation>

Run the tests

make test

Executing program in CLI

Setup as a Command Line Tool

python -m pip install --editable .

Run the calculator with prompts

spcalc

Run the calculator with arguments

spcalc -n1 <first number> -n2 <second number> -op <operation>

Help

Usage: main.py [OPTIONS]

Options:
  -n1, --num1 FLOAT               First number
  -n2, --num2 FLOAT               Second number
  -op, --operation [add|subtract|multiply|divide]
                                  Operation to perform
  --help                          Show this message and exit.

Use as a pip package

install pip package

pip install spcalc

Example usecae

from spcalc import calculator, add, subtract, multiply, divide

mycalc = calculator.Calculator(3,5,add.Add()) #subtract.Subtract(), multiply.Multiply(), divide.Divide()

print(mycalc.execute())

Authors

Yasiru Rangana

Version History

V1.0.0
- Initial Release as a Command Line Tool
V1.1.0
- Minor Bugs were fixed
V1.2.0
- Minor Improvements
V 2.0.0
- Major release

License

This project is licensed under the MIT License - see the License file for details