app.py

import gradio as gr

# Define a function for the main application
def greet(name):
    return f"Hello {name}!"

# Define a function for the authentication
def login(username, password):
    if username == "your_username" and password == "your_password":
        return True
    else:
        return False

# Create the Gradio Blocks interface
with gr.Blocks() as app:
    gr.Markdown("### Login")
    
    with gr.Row():
        username_input = gr.Textbox(label="Username", placeholder="Enter your username")
        password_input = gr.Textbox(label="Password", placeholder="Enter your password", type="password")
    
    login_button = gr.Button("Login")
    output_text = gr.Textbox(label="Output", interactive=False)

    # Function to handle login and display greeting
    def handle_login(username, password):
        if login(username, password):
            # Clear the password field and display the greeting
            password_input.clear()
            return greet(username)
        else:
            return "Invalid credentials! Please try again."
    
    # Bind the button click to the handle_login function
    login_button.click(handle_login, inputs=[username_input, password_input], outputs=output_text)

# Launch the app
app.launch()