update the api_key to use the system enviroment, update for gpt-4 and readme update

Author: carlosportella16

my-chatbot.py

@@ -1,9 +1,12 @@
 from openai import OpenAI
 import os
 
-client = OpenAI(
-    api_key="YOUR-API-KEY"
-)
+# Load the API key from an environment variable
+api_key = os.getenv("OPENAI_API_KEY")
+if not api_key:
+    raise ValueError("No OpenAI API key found. Set the OPENAI_API_KEY environment variable.")
+
+client = OpenAI(api_key=api_key)
 
 
 def chat_with_gpt(prompt):
@@ -14,7 +17,7 @@ def chat_with_gpt(prompt):
             "content": prompt,
         }
     ],
-    model="gpt-3.5-turbo",
+    model="gpt-4",
     )
 
     return response.choices[0].message.content.strip()

readme.md

@@ -1,7 +1,7 @@
 # my-chatboot
 
 ## Overview
-This project integrates OpenAI's GPT technology to create an interactive chatbot. As of the last update, the code is compatible with the latest version of ChatGPT, ensuring up-to-date interactions and features.
+This project I show how to integrate GPT-4 in a python project as a chatbot. I'll be implementing upload and files generations by prompt in the chatbot.
 
 ## Features
 - Interactive ChatGPT-based chatbot.
@@ -28,5 +28,11 @@ python my-chatbot.py
 ### Using ChatGpt 4
 To use chatgpt 4 instead 3.5 you need to change this part of code:
 ```
-model="gpt-4.0-turbo",  # Updated to ChatGPT-4 model
+model="gpt-4-vision-preview",  # Updated to ChatGPT-4 model
+```
+
+### Using ChatGpt 3.5
+To use chatgpt 4 instead 3.5 you need to change this part of code:
+```
+model="gpt-3.5-turbo",  # Updated to ChatGPT-3.5 model
 ```