I am making an app that shows some pictures and you can like each picture. I am sending a POST request from the Android device. In my backend I have a Python script that takes parameters category and URL of the picture, opens a JSON file, and modifies the likes value.This is the Python script:#!/usr/bin/python# Import modules for CGI handling import cgi, cgitb, json# Create instance of FieldStorage form = cgi.FieldStorage() # Get data from fieldscategory= form.getvalue('category')url= form.getvalue('url')#Gets the file path,depending on the categoryfilepath='/home2/public_html/app/%s/%s.json' % (category,category)# Open a filewith open(filepath) as data_file:    data = json.load(data_file)# Finds the picture with the specific url and updates the likes value.for picture in data:    if picture [url] == url:        likes = int(picture[likes])        picture[likes]=str(likes+1)        break# Writes the json file with the new value.with open(filepath, 'w') as data_file:    data_file.write(json.dumps(data))My JSON looks like this:{url: http://pictures.com/app/Funny/picture.jpg, category: Funny, likes: 0}What can go wrong with this script? Are there any potential drawbacks? I am new to backend programming, so I don't know what can go wrong here.
App for displaying pictures to like
python;json;server