สร้าง chatbot ส่วนตัว ใน 5 ขั้นตอน ด้วย OpenAI library ใน Python — ตัวอย่างการสร้าง Gemini chatbot

# Import libraries

# For Gemini
from openai import OpenAI

# For text rendering
from IPython.display import display, Markdown

# Create client
client = OpenAI(
    api_key="YOUR_API_KEY_HERE",
    base_url="<https://generativelanguage.googleapis.com/v1beta/openai/>"
)

# Set system prompt
system_prompt = """
You are a helpful, cheerful, and optimistic assistant.

Be concise, validate answers, and admit when you don’t know.

Make responses clear, easy to read, and sprinkle in playful emoji.
"""

# Instantiate chat history
chat_history = [
    {
        "role": "system",
        "content": system_prompt
    }
]

# Create a function for chatbot
def chatbot(model="gemini-2.5-flash"):

    # Set chat history as global variable
    global chat_history

    # Print chat header
    display(Markdown("# 🟢 --- Chat Begins ---"))

    # Print chat instruction
    print("ℹ️ Type \\"end chat\\" to exit.")

    # Loop through conversation
    while True:

        # Render user prompt display
        display(Markdown("## 🧑‍💻 You:"))

        # Get user input
        user_prompt = input("")

        # Check if user wants to exit chat
        if user_prompt.lower() == "end chat":

            # Print goodbye message
            display(Markdown("## ✨ Assistant:\\n" + "👋 See you later!"))

            # End chat
            break

        # Append user input to chat history
        chat_history.append(
            {
                "role": "user",
                "content": user_prompt
            }
        )

        # Get response
        response = client.chat.completions.create(

            # Set prompt
            messages=chat_history,

            # Set model
            model=model
        )

        # Append response to history
        chat_history.append(
            {
                "role": "assistant",
                "content": response.choices[0].message.content
            }
        )

        # Render response
        display(Markdown("## ✨ Assistant:\\n" + response.choices[0].message.content + "\\n"))

# Start chatting
chatbot()