topsis-Shivansh-102203508 1.0.1

A Python package for performing TOPSIS analysis.

TOPSIS-Python

A Python package for implementing the Technique for Order of Preference by Similarity to Ideal Solution (TOPSIS) method.

Description

TOPSIS (Technique for Order of Preference by Similarity to Ideal Solution) is a multi-criteria decision analysis method. This implementation helps decision makers to find the best alternative from a finite set of alternatives based on multiple criteria.

The package provides functionality to:

• Normalize decision matrices
• Apply user-defined weights to criteria
• Handle both positive and negative impact criteria
• Calculate relative closeness to ideal solutions
• Rank alternatives based on TOPSIS scores

Installation

You can install the package via pip:

pip install topsis-Shivansh-102203508

Usage

Command Line Interface

topsis <InputDataFile> <Weights> <Impacts> <ResultFileName>

Parameters:

• InputDataFile: Excel file (.xlsx) containing the decision matrix
• Weights: Comma-separated weights for each criterion (e.g., "0.25,0.25,0.25,0.25")
• Impacts: Comma-separated impacts for each criterion ('+' for positive, '-' for negative) (e.g., "-,+,+,+")
• ResultFileName: Output Excel file name where results will be saved

Example:

topsis input.xlsx "0.25,0.25,0.25,0.25" "+,+,-,+" result.xlsx

Input File Format

Your input Excel file should be structured as follows:

• First column: Alternative names/identifiers
• Subsequent columns: Criteria values
• First row: Header with criteria names

Example:

Model   Price   Storage   Camera   Battery
A1      800     128      12       4000
A2      900     256      16       4500
A3      1000    512      20       5000

Output

The program will generate an Excel file containing:

• All original columns
• Additional column 'Topsis Score'
• Additional column 'Rank'

Error Handling

The package handles various errors including:

• Incorrect number of command-line arguments
• Invalid input file format
• Mismatched weights or impacts
• File I/O errors

Dependencies

• pandas
• sys

License

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

Author

Shivansh Gupta

Contributing

Contributions are welcome! Please feel free to submit a Pull Request.

Sample Code

import pandas as pd
from topsis-Shivansh-102203508 import topsis

# Read your data
df = pd.read_excel('input.xlsx')

# Define weights and impacts
weights = "0.25,0.25,0.25,0.25"
impacts = "+,+,-,+"

# Calculate TOPSIS
result = topsis(df, weights, impacts)