my_layout.py

from dash import html
from dash import dcc


layout = html.Div([
    html.H1("Yeay, my app!"),
    html.Div([
        html.Label("Enter your text:"),
        dcc.Input(id='input-text', type='text', value=''),
        html.Button('Submit', id='submit-btn', n_clicks=0),
    ]),
    html.Div(id='output-container-button')
])