Dash

import dash
from dash import Dash, dcc, html, dash_table, Input, Output, State, callback

from dash import Dash, html, dcc, callback, Input, Output, State

from dash import Dash, html, dcc, callback, Input, Output
import plotly.express as px

# Initialize the app
app = Dash(__name__)

# Define the layout
app.layout = html.Div([
    html.H1("Hello Dash"),
    html.Div("Select a value:"),
    dcc.Dropdown(
        id='dropdown',
        options=[
            {'label': 'New York City', 'value': 'NYC'},
            {'label': 'Montreal', 'value': 'MTL'},
            {'label': 'San Francisco', 'value': 'SF'}
        ],
        value='NYC'
    ),
    html.Div(id='output-container')
])

# Define callback
@callback(
    Output('output-container', 'children'),
    Input('dropdown', 'value')
)
def update_output(value):
    return f'You have selected {value}'

if __name__ == '__main__':
    app.run(debug=True)

class Dash:
    def __init__(
        self,
        name: str = None,
        server: Any = None,
        assets_folder: str = 'assets',
        pages_folder: str = 'pages',
        use_pages: bool = None,
        assets_url_path: str = '/assets/',
        assets_ignore: str = '',
        external_scripts: List[Union[str, Dict]] = None,
        external_stylesheets: List[Union[str, Dict]] = None,
        suppress_callback_exceptions: bool = None,
        prevent_initial_callbacks: bool = None,
        show_undo_redo: bool = False,
        plugins: List = None,
        title: str = 'Dash',
        update_title: str = 'Updating...',
        **kwargs
    ): ...
    
    def run(self, debug: bool = None, port: int = 8050, host: str = '127.0.0.1', **kwargs): ...
    def callback(self, *args, **kwargs): ...
    def clientside_callback(self, clientside_function, output, inputs, state=None, **kwargs): ...

class Input:
    def __init__(self, component_id: Union[str, Dict], component_property: str): ...

class Output:
    def __init__(self, component_id: Union[str, Dict], component_property: str): ...

class State:
    def __init__(self, component_id: Union[str, Dict], component_property: str): ...

class ClientsideFunction:
    def __init__(self, namespace: str, function_name: str): ...

def callback(*args, **kwargs): ...
def clientside_callback(clientside_function, output, inputs, state=None, **kwargs): ...

# Wildcard patterns
MATCH: Any  # Match any ID in pattern-matching callbacks
ALL: Any    # Match all IDs in pattern-matching callbacks
ALLSMALLER: Any  # Match all smaller indices in pattern-matching callbacks

# Dash Core Components (dcc)
class Graph(Component): ...
class Dropdown(Component): ...
class Slider(Component): ...
class Input(Component): ...
class Store(Component): ...
class Location(Component): ...
class Link(Component): ...

# Dash HTML Components (html)
class Div(Component): ...
class H1(Component): ...
class Button(Component): ...
class A(Component): ...
class P(Component): ...

# Dash DataTable
class DataTable(Component): ...

def register_page(
    module: str = None,
    path: str = None,
    path_template: str = None,
    name: str = None,
    order: Union[int, float] = None,
    title: str = None,
    description: str = None,
    image: str = None,
    redirect_from: List[str] = None,
    layout: Any = None,
    **kwargs
): ...

page_registry: Dict[str, Any]  # Registry of all registered pages
page_container: Component      # Container component for page content

class NoUpdate:
    """Sentinel value to prevent component updates."""
    pass

no_update: NoUpdate  # Alias for NoUpdate()

class PreventUpdate(Exception):
    """Exception to prevent callback execution."""
    pass

class Patch:
    """Partial updates for lists and dictionaries."""
    def append(self, item): ...
    def prepend(self, item): ...
    def insert(self, index: int, item): ...
    def remove(self, item): ...
    def clear(self): ...

class CeleryManager:
    def __init__(self, celery_app): ...

class DiskcacheManager:
    def __init__(self, cache_by: str = "session", cache: Any = None): ...

# Background callback decorator
@callback(
    background=True,
    manager=CeleryManager(celery_app),
    running=[(Output("loading", "children"), "Running...")],
    progress=[Output("progress", "value"), Output("progress", "max")],
    progress_default=[0, 100]
)
def long_running_callback(*args): ...

def get_asset_url(path: str) -> str:
    """Get URL for asset file."""
    ...

def get_relative_path(path: str) -> str:
    """Get relative path from request."""
    ...

def strip_relative_path(path: str) -> str:
    """Strip relative path prefix."""
    ...

# Core types
Component = Any                           # Base component class
ComponentIdType = Union[str, Dict, Component]  # Component identifier
LayoutType = Union[Component, List, Dict, str, int, float]  # Layout content

# Callback types
CallbackContext = Any                     # Callback execution context
CallbackFunction = Callable[..., Any]     # Callback function signature
DependencyList = List[Union[Input, Output, State]]  # Callback dependencies

# App configuration
ServerType = Any                          # Flask server instance
AssetList = List[Union[str, Dict[str, str]]]  # External assets
PluginList = List[Any]                    # Plugin instances

# Multi-page types
PageConfig = Dict[str, Any]               # Page configuration
PageRegistry = Dict[str, PageConfig]      # Page registry