Hello everyone, This is my first post on a useful Python script. I will publish more posts in the future where I will collect important scripts of Python or mini-projects to improve my Python skills.

1. Convert JSON to CSV

This script will convert your JSON data to a CSV file. It takes .json a file as input and provides .csv the file as output.

Installation

pip install json

Python Script (json-to-csv.py)

import json

if __name__ == '__main__':
    try:
        with open('input.json', 'r') as f:
            data = json.loads(f.read())

        output = ','.join([*data[0]])
        for obj in data:
            output += f'\n{obj["Name"]},{obj["age"]},{obj["birthyear"]}'

        with open('output.csv', 'w') as f:
            f.write(output)
    except Exception as ex:
        print(f'Error: {str(ex)}')

JSON File (input.json)

[
  {
    "Name": "Badal Singh", "age": 26, "birthyear": "1994"
  },
  {
    "Name": "Nirbhay", "age": 34, "birthyear": "1986"
  }
]

Run

python3 json-to-csv.py

2. Python Password Generator

This simple Python project is using random and string package to generate a random string of a given length.

Python script (python-password.py)

import random
import string
total = string.ascii_letters + string.digits + string.punctuation
length = 16
password = "".join(random.sample(total, length))
print(password)

Run

python3 python-password.py

3. String search from multiple files

Finds a file with the supplied string in the folder of your choosing.

Python script (search-string.py)

import os
text = input("input text : ")
path = input("path : ")
# os.chdir(path)
def getfiles(path):
    f = 0
    os.chdir(path)
    files = os.listdir()
    # print(files)
    for file_name in files:
        abs_path = os.path.abspath(file_name)
        if os.path.isdir(abs_path):
            getfiles(abs_path)
        if os.path.isfile(abs_path):
            f = open(file_name, "r")
            if text in f.read():
                f = 1
                print(text + " found in ")
                final_path = os.path.abspath(file_name)
                print(final_path)
                return True
    if f == 1:
        print(text + " not found! ")
        return False
getfiles(path)

Run

python3 search-string.py

4. Fetch all links from a given webpage

This script gets all links from a particular website and saves them as a text file.

Installation

pip install beautifulsoup4 requests

Python script (get-links.py)

import requests as rq
from bs4 import BeautifulSoup

url = input("Enter Link: ")
if ("https" or "http") in url:
    data = rq.get(url)
else:
    data = rq.get("https://" + url)
soup = BeautifulSoup(data.text, "html.parser")
links = []
for link in soup.find_all("a"):
    links.append(link.get("href"))

# Writing the output to a file (myLinks.txt) instead of to stdout
# You can change 'a' to 'w' to overwrite the file each time
with open("myLinks.txt", 'a') as saved:
    print(links[:10], file=saved)

Run

python3 get-links.py

5. Image Watermark

This project will take a photograph and put a watermark of your choice on it.

Installation

pip install Pillow

Python script (watermark.py)

import os
from PIL import Image

def watermark_photo(input_image_path,watermark_image_path,output_image_path):
    base_image = Image.open(input_image_path)
    watermark = Image.open(watermark_image_path).convert("RGBA")
    # add watermark to your image
    position = base_image.size
    newsize = (int(position[0]*8/100),int(position[0]*8/100))
    # print(position)
    watermark = watermark.resize(newsize)
    # print(newsize)
    # return watermark

    new_position = position[0]-newsize[0]-20,position[1]-newsize[1]-20
    # create a new transparent image
    transparent = Image.new(mode='RGBA',size=position,color=(0,0,0,0))
    # paste the original image
    transparent.paste(base_image,(0,0))
    # paste the watermark image
    transparent.paste(watermark,new_position,watermark)
    image_mode = base_image.mode
    print(image_mode)
    if image_mode == 'RGB':
        transparent = transparent.convert(image_mode)
    else:
        transparent = transparent.convert('P')
    transparent.save(output_image_path,optimize=True,quality=100)
    print("Saving"+output_image_path+"...")

folder = input("Enter Folder Path:")
watermark = input("Enter Watermark Path:")
os.chdir(folder)
files = os.listdir(os.getcwd())
print(files)

if not os.path.isdir("output"):
    os.mkdir("output")

c = 1
for f in files:
    if os.path.isfile(os.path.abspath(f)):
        if f.endswith(".png") or f.endswith(".jpg"):
            watermark_photo(f,watermark,"output/"+f)

Run

python3 watermark.py [image_path]

Replace [image path] with the image on which you wish to apply a watermark.

Conclusion

I have provided 5 scripts to learn Python. I hope these will help you learn something new. Clap 👏 on this post to learn more posts from this series of posts soon. Learn more python script posts here.

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5 Most Useful Scripts in Python - Part 1