Calculate common screen rations from a given user input dimension. Scripts in both Bash .sh and Python .py

calc_ratios.py

#!/usr/bin/env python3

def calculate_dimension(base_dimension, ratio):
    calculated_dimension = int(base_dimension * ratio)
    return calculated_dimension

def main():
    dimension_choice = input("Enter 'w' for width or 'h' for height: ")
    input_dimension = int(input("Enter the base dimension (as an integer): "))
    print(f"\n")
    base_dimension = input_dimension
    ratios_w = {'16:9': 9 / 16, '4:3': 3 / 4, '21:9': 9 / 21, '16:10': 10 / 16, '5:4': 4 / 5}
    ratios_h = {'16:9': 16 / 9, '4:3': 4 / 3, '21:9': 21 / 9, '16:10': 16 / 10, '5:4': 5 / 4}
    
    ratios = ratios_w if dimension_choice.lower() == 'w' else ratios_h
    dimension_type = 'Width' if dimension_choice.lower() == 'w' else 'Height'
    
    # Output the calculated ratios and results.
    print(f"Screen Ratios for {dimension_type} {base_dimension}:")
    for ratio, ratio_value in ratios.items():
        calculated_dimension = calculate_dimension(base_dimension, ratio_value)
        formatted_dimension = int(calculated_dimension) if calculated_dimension % 1 == 0 else calculated_dimension
        if dimension_choice.lower() == 'w':
            print(f"  {ratio} - {base_dimension}:{formatted_dimension}")
        elif dimension_choice.lower() == 'h':
            print(f"  {ratio} - {formatted_dimension}:{base_dimension}")

if __name__ == "__main__":
    main()

calc_ratios.sh

#!/bin/bash

# Function to check if a command is available
command_exists() {
    command -v "$1" >/dev/null 2>&1
}

# Function to install 'bc' if not found
install_bc() {
    if command_exists apt-get; then
        sudo apt-get update
        sudo apt-get install -y bc
    elif command_exists yum; then
        sudo yum install -y bc
    else
        echo "Please install 'bc' manually and rerun the script."
        exit 1
    fi
    echo ""
    echo ""
}

# Check if 'bc' is available
if ! command_exists bc; then
    read -p "'bc' is not installed. Do you want to install it? (y/n): " install_choice
    if [ "$install_choice" == "y" ]; then
        install_bc
    else
        echo "Please install 'bc' manually and rerun the script."
        exit 1
    fi
fi

calculate_dimension() {
    base_dimension=$1
    ratio=$2
    calculated_dimension=$(echo "scale=0; $base_dimension * $ratio" | bc -l)
    echo $calculated_dimension
}

main() {
    read -p "Enter 'w' for width or 'h' for height: " dimension_choice
    read -p "Enter the base dimension (as an integer): " input_dimension
    
    echo ""

    base_dimension=$input_dimension
    declare -A ratios_w=( ["16:9"]="9/16" ["4:3"]="3/4" ["21:9"]="9/21" ["16:10"]="10/16" ["5:4"]="4/5" )
    declare -A ratios_h=( ["16:9"]="16/9" ["4:3"]="4/3" ["21:9"]="21/9" ["16:10"]="16/10" ["5:4"]="5/4" )
    
    ratios=()
    if [ "$dimension_choice" == "w" ]; then
        ratios=("${!ratios_w[@]}")  # Corrected line to store keys instead of values
        dimension_type="Width"
    elif [ "$dimension_choice" == "h" ]; then
        ratios=("${!ratios_h[@]}")  # Corrected line to store keys instead of values
        dimension_type="Height"
    else
        echo "Invalid choice. Exiting."
        exit 1
    fi
    
    # Output the calculated ratios and results.
    echo "Screen Ratios for $dimension_type $base_dimension:"
    for ratio in "${ratios[@]}"; do
        ratio_value=${ratios_w["$ratio"]}  # Use ratios_w for width and ratios_h for height
        calculated_dimension=$(calculate_dimension $base_dimension $ratio_value)
        formatted_dimension=$(echo $calculated_dimension | sed 's/\.[0-9]*$//')
        
        if [ "$dimension_choice" == "w" ]; then
            echo "  $ratio - $base_dimension:$formatted_dimension"
        elif [ "$dimension_choice" == "h" ]; then
            echo "  $ratio - $formatted_dimension:$base_dimension"
        fi
    done
}


if [ "$BASH_SOURCE" == "$0" ]; then
    main
fi