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+url="https://localhost:8000"
+email="example@gmail.com"
+password="abcdefghijklmnop"

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+__pycache__
+.env

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+import requests
+import time
+import smtplib
+
+DEFAULT_INTERVAL = 5
+DEFAULT_SMTP_URL = "smtp.gmail.com"
+DEFAULT_SMTP_PORT = 587
+DEFAULT_SUBJECT = "Webpage Content Changed"
+DEFAULT_MESSAGE = """Subject: {s}
+
+The contents of the webpage have changed! {u}
+
+Previous content:
+{p}
+
+Current content:
+{c}"""
+
+def monitor(url: str, sender_email: str, sender_password: str,
+            recipient_email=None, interval=DEFAULT_INTERVAL,
+            subject=DEFAULT_SUBJECT, message=DEFAULT_MESSAGE,
+            smtp_url=DEFAULT_SMTP_URL, smtp_port=DEFAULT_SMTP_PORT):
+
+    if recipient_email is None:
+        recipient_email = sender_email
+
+    previous_content = None
+
+    def send_notification(previous_content, current_content):
+        msg = message.format(s=subject,
+                                 p=previous_content,
+                                 c=current_content,
+                                 u=url
+                                ).encode("utf-8")
+        try:
+            with smtplib.SMTP(smtp_url, smtp_port) as smtp:
+                smtp.ehlo()
+                smtp.starttls()
+                smtp.ehlo()
+                smtp.login(sender_email, sender_password)
+                smtp.sendmail(sender_email, recipient_email, msg)
+        except Exception as e:
+            print(f"Error sending email: {e}")
+
+    print(f"{time.ctime()}: started monitoring {url}.")
+    while True:
+        response = requests.get(url)
+        current_content = response.text
+        if previous_content and previous_content != current_content:
+            print(f"{time.ctime()}: change detected.")
+            send_notification(previous_content, current_content)
+        previous_content = current_content
+        time.sleep(interval * 60) # wait for `interval` minutes

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+# Simple webpage checker in Python.
+
+While `main.py` is just an example of usage, the main function is in `Monitor.py` and it has zero requirements.
+
+`main.py`'s only requirement is `python-dotenv`, in order to load environment variables from a provided `.env` file.

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+import os
+from Monitor import monitor
+from dotenv import load_dotenv
+load_dotenv()
+
+if __name__ == "__main__":
+    monitor(os.getenv("url"), os.getenv("email"), os.getenv("password"), interval=1)
+    

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+python-dotenv