Python 3. Convert bulk images from any file type to PNG with progress bar and save in new directory

resize.sh

#!/bin/bash

arg=$1

red='\033[1;31m'
yellow='\033[1;33m'
cyan='\033[1;36m'
purple='\033[1;35m'
nl='\n'
nc='\033[0m'

build_env(){
    printf '\n'
    echo -e "${purple}Resize & rename script starting...${nc}"
    cp ~/tools/resize_to_png/resize_to_png.py .
    printf '\n'
    echo -e "${purple}copying python script to current directory...${nc}"
    printf '\n'
    echo -e "${purple}Building temporary environment...${nc}"
    pipenv --three
    pipenv install Pillow progress
    pipenv shell
    printf '\n'
    echo -e "${purple}Environment build complete. Run 'resize run' to continue${nc}"
    printf '\n'

}

resize(){

    python resize_to_png.py
    echo -e "${purple}Operation complete, tearing down pipenv and removing temporary files...${nc}"
    pipenv --rm
    rm Pipfile Pipfile.lock resize_to_png.py
    exit

}

help(){
    echo -e "${cyan}--------------------------------------------------------------------------${nc}"
    echo -e "${cyan}| resize converts .jpg and .tif files to .png and resizes to 1920 x 1080 |${nc}"
    echo -e "${cyan}--------------------------------------------------------------------------${nc}"
    printf '\n'
    echo -e "Commands:"
    printf '\n'
    echo -e "${red}build${nc}     Builds a temporary local environment and installs dependencies"
    echo -e "${yellow}run${nc}       Executes the script and removes the temporary environment"

}

if [ $# -eq 0 ]; then
    help
elif [ $arg == "build" ]; then
    build_env
elif [ $arg == "run" ]; then
    resize
else
    echo -e "${red}Unknown argument: ${arg}${nc}"
fi

resize_to_png.py

import os, sys
from PIL import Image
from progress.bar import Bar

width = 1080
height = 800

root = os.getcwd()
save_dir_name = "edits"
save_dir = root + "/" + save_dir_name

size = (width, height)

img_types = (".JPG", ".TIF")

images = [f for f in os.listdir(os.curdir) if f.endswith(img_types)]

if len(images) == 0:
    print("No images found in this directory")
    exit()
else:

    bar = Bar('Processing', max=len(images))

    print("Processing {} images".format(len(images)))

    os.mkdir(save_dir)

    for image in images:
	    (name, extension) = image.split(".")
	    im = Image.open(image)
	    im.thumbnail(size, Image.ANTIALIAS)
	    os.chdir(save_dir)
	    im.save(name + ".png")
	    os.chdir(root)
	    bar.next()

    bar.finish()
    print("Job finished. Processed {} images".format(len(images)))

Add resize_to_png.py in ~/tools/resize_to_png
Add resize.sh in ~/tools/resize_to_png

Add alias resize="~/tools/resize_to_png/resize.sh" in ~/.bashrc

Execute resize build followed by resize run in the directory containing the images you want to resize

Script will create temp pipenv and install dependencies -> create a new directory called edits -> resize images and convert to .png -> removes pipenv

run exit to leave the pipenv shell after the script has completed

Not perfect but gets the job done