Saksham Jain| url_shortener| Added a URL shortener

url_shortener/README.md

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+### URL Shortener
+Project Description
+
+URL Shortener is a simple Python program that generates short URLs for long URLs. It uses the MD5 hash of the long URL to create a unique short identifier, allowing users to convert long URLs into shorter, more manageable links.
+Idea   
+
+Usage
+
+To use the URL Shortener, simply create an instance of the URLShortener class and call the shorten_url() method to generate a short URL for a long URL. You can also use the expand_url() method to retrieve the original long URL from a short URL.
+
+Contributors
+
+saksham-jain177
+https://github.com/saksham-jain177

url_shortener/url_shortener.py

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+import hashlib
+
+class URLShortener:
+    def __init__(self):
+        self.url_map = {}
+
+    def generate_short_url(self, long_url):        
+        hash_object = hashlib.md5(long_url.encode())
+        short_url = hash_object.hexdigest()[:8]  
+        return short_url
+
+    def shorten_url(self, long_url):
+        if long_url in self.url_map:
+            return self.url_map[long_url]
+        else:
+            short_url = self.generate_short_url(long_url)
+            self.url_map[long_url] = short_url
+            return short_url
+
+    def expand_url(self, short_url):
+        for long_url, url_hash in self.url_map.items():
+            if url_hash == short_url:
+                return long_url
+        return "Short URL not found"
+
+if __name__ == "__main__":
+    shortener = URLShortener()
+    long_url = "https://www.example.com/this/is/a/long/url"
+
+
+    short_url = shortener.shorten_url(long_url)
+    print("Shortened URL:", short_url)
+
+
+    original_url = shortener.expand_url(short_url)
+    print("Original URL:", original_url)