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app.py

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+import os
+import gradio as gr
+from openai import OpenAI
+
+# Hugging Face Spaces secret name:
+# Add this in Space Settings > Secrets:
+# OPENAI_API_KEY = your_openai_api_key
+OPENAI_API_KEY = os.getenv("OPENAI_API_KEY")
+MODEL_NAME = os.getenv("OPENAI_MODEL", "gpt-5.5")
+
+client = OpenAI(api_key=OPENAI_API_KEY) if OPENAI_API_KEY else None
+
+SYSTEM_INSTRUCTIONS = """
+You are a helpful Python tutor and AI assistant.
+Explain concepts clearly, give simple examples, and help beginners debug code step by step.
+Keep answers practical and beginner-friendly.
+"""
+
+
+def ask_ai(user_question):
+    if not OPENAI_API_KEY:
+        return (
+            "OPENAI_API_KEY is missing.\n\n"
+            "In Hugging Face Spaces, go to:\n"
+            "Settings > Secrets > New Secret\n\n"
+            "Name: OPENAI_API_KEY\n"
+            "Value: your OpenAI API key"
+        )
+
+    if not user_question or not user_question.strip():
+        return "Please enter a question."
+
+    try:
+        # Important:
+        # Do NOT pass temperature for gpt-5.5.
+        # Some GPT-5.x models only support the default temperature value.
+        response = client.responses.create(
+            model=MODEL_NAME,
+            instructions=SYSTEM_INSTRUCTIONS,
+            input=user_question.strip(),
+        )
+
+        return response.output_text
+
+    except Exception as e:
+        return f"Error: {type(e).__name__}\n\n{str(e)}"
+
+
+demo = gr.Interface(
+    fn=ask_ai,
+    inputs=gr.Textbox(
+        label="Ask your question",
+        placeholder="Example: Explain Python lists with a simple example",
+        lines=5,
+    ),
+    outputs=gr.Markdown(label="AI Response"),
+    title="Python Tutor with OpenAI",
+    description=(
+        "A simple Hugging Face Spaces app using OpenAI. "
+        "Add OPENAI_API_KEY in Hugging Face Secrets before running."
+    ),
+    examples=[
+        ["Explain Python functions with one simple example."],
+        ["What is the difference between a list and a tuple in Python?"],
+        ["Fix this code: for i in range(5) print(i)"],
+    ],
+)
+
+
+if __name__ == "__main__":
+    demo.launch()

requirements.txt

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+gradio
+openai