# Command Help

The same as before, you can add help for the commands in the docstrings and the *CLI options*.

And the `typer.Typer()` application receives a parameter `help` that you can pass with the main help text for your CLI program:

{* docs_src/commands/help/tutorial001_an.py hl[4,9:11,22,26:30,43,47:51,60:62] *}

Check it:

<div class="termy">

```console
// Check the new help
$ python main.py --help

Usage: main.py [OPTIONS] COMMAND [ARGS]...

  Awesome CLI user manager.

Options:
  --install-completion  Install completion for the current shell.
  --show-completion     Show completion for the current shell, to copy it or customize the installation.
  --help                Show this message and exit.

Commands:
  create      Create a new user with USERNAME.
  delete      Delete a user with USERNAME.
  delete-all  Delete ALL users in the database.
  init        Initialize the users database.

// Now the commands have inline help 🎉

// Check the help for create
$ python main.py create --help

Usage: main.py create [OPTIONS] USERNAME

  Create a new user with USERNAME.

Options:
  --help  Show this message and exit.

// Check the help for delete
$ python main.py delete --help

Usage: main.py delete [OPTIONS] USERNAME

  Delete a user with USERNAME.

  If --force is not used, will ask for confirmation.

Options:
  --force / --no-force  Force deletion without confirmation.  [required]
  --help                Show this message and exit.

// Check the help for delete-all
$ python main.py delete-all --help

Usage: main.py delete-all [OPTIONS]

  Delete ALL users in the database.

  If --force is not used, will ask for confirmation.

Options:
  --force / --no-force  Force deletion without confirmation.  [required]
  --help                Show this message and exit.

// Check the help for init
$ python main.py init --help

Usage: main.py init [OPTIONS]

  Initialize the users database.

Options:
  --help  Show this message and exit.
```

</div>

/// tip

`typer.Typer()` receives several other parameters for other things, we'll see that later.

You will also see how to use "Callbacks" later, and those include a way to add this same help message in a function docstring.

///

## Overwrite command help

You will probably be better adding the help text as a docstring to your functions, but if for some reason you wanted to overwrite it, you can use the `help` function argument passed to `@app.command()`:

{* docs_src/commands/help/tutorial002.py hl[6,14] *}

Check it:

<div class="termy">

```console
// Check the help
$ python main.py --help

// Notice it uses the help passed to @app.command()
Usage: main.py [OPTIONS] COMMAND [ARGS]...

Options:
  --install-completion  Install completion for the current shell.
  --show-completion     Show completion for the current shell, to copy
                        it or customize the installation.
  --help                Show this message and exit.

Commands:
  create  Create a new user with USERNAME.
  delete  Delete a user with USERNAME.

// It uses "Create a new user with USERNAME." instead of "Some internal utility function to create."
```

</div>

## Deprecate a Command

There could be cases where you have a command in your app that you need to deprecate, so that your users stop using it, even while it's still supported for a while.

You can mark it with the parameter `deprecated=True`:

{* docs_src/commands/help/tutorial003.py hl[14] *}

And when you show the `--help` option you will see it's marked as "`deprecated`":

<div class="termy">

```console
$ python main.py --help

<b> </b><font color="#F4BF75"><b>Usage: </b></font><b>main.py [OPTIONS] COMMAND [ARGS]...                  </b>
<b>                                                                     </b>
<font color="#A5A5A1">╭─ Options ─────────────────────────────────────────────────────────╮</font>
<font color="#A5A5A1">│ </font><font color="#A1EFE4"><b>--install-completion</b></font>          Install completion for the current  │
<font color="#A5A5A1">│                               shell.                              │</font>
<font color="#A5A5A1">│ </font><font color="#A1EFE4"><b>--show-completion</b></font>             Show completion for the current     │
<font color="#A5A5A1">│                               shell, to copy it or customize the  │</font>
<font color="#A5A5A1">│                               installation.                       │</font>
<font color="#A5A5A1">│ </font><font color="#A1EFE4"><b>--help</b></font>                        Show this message and exit.         │
<font color="#A5A5A1">╰───────────────────────────────────────────────────────────────────╯</font>
<font color="#A5A5A1">╭─ Commands ────────────────────────────────────────────────────────╮</font>
<font color="#A5A5A1">│ </font><font color="#A1EFE4"><b>create       </b></font> Create a user.                                      │
<font color="#A5A5A1">│ </font><font color="#6B9F98"><b>delete       </b></font> Delete a user.              <font color="#F92672">(deprecated)           </font> │
<font color="#A5A5A1">╰───────────────────────────────────────────────────────────────────╯</font>
```

</div>

And if you check the `--help` for the deprecated command (in this example, the command `delete`), it also shows it as deprecated:

<div class="termy">

```console
$ python main.py delete --help

<b> </b><font color="#F4BF75"><b>Usage: </b></font><b>main.py delete [OPTIONS] USERNAME                    </b>
<b>                                                                     </b>
 <font color="#F92672">(deprecated) </font>
 Delete a user.
 This is deprecated and will stop being supported soon.

<font color="#A5A5A1">╭─ Arguments ───────────────────────────────────────────────────────╮</font>
<font color="#A5A5A1">│ </font><font color="#F92672">*</font>    username      <font color="#F4BF75"><b>TEXT</b></font>  [default: None] <font color="#A6194C">[required]</font>               │
<font color="#A5A5A1">╰───────────────────────────────────────────────────────────────────╯</font>
<font color="#A5A5A1">╭─ Options ─────────────────────────────────────────────────────────╮</font>
<font color="#A5A5A1">│ </font><font color="#A1EFE4"><b>--help</b></font>          Show this message and exit.                       │
<font color="#A5A5A1">╰───────────────────────────────────────────────────────────────────╯</font>
```

</div>

## Rich Markdown and Markup

If you have **Rich** installed as described in [Printing and Colors](../printing.md){.internal-link target=_blank}, you can configure your app to enable markup text with the parameter `rich_markup_mode`.

Then you can use more formatting in the docstrings and the `help` parameter for *CLI arguments* and *CLI options*. You will see more about it below. 👇

/// info

By default, `rich_markup_mode` is `None` if Rich is not installed, and `"rich"` if it is installed. In the latter case, you can set `rich_markup_mode` to `None` to disable rich text formatting.

///

### Rich Markup

If you set `rich_markup_mode="rich"` when creating the `typer.Typer()` app, you will be able to use <a href="https://rich.readthedocs.io/en/stable/markup.html" class="external-link" target="_blank">Rich Console Markup</a> in the docstring, and even in the help for the *CLI arguments* and options:

{* docs_src/commands/help/tutorial004_an.py hl[4,10,14:16,21,24,27] *}

With that, you can use <a href="https://rich.readthedocs.io/en/stable/markup.html" class="external-link" target="_blank">Rich Console Markup</a> to format the text in the docstring for the command `create`, make the word "`create`" bold and green, and even use an <a href="https://rich.readthedocs.io/en/stable/markup.html#emoji" class="external-link" target="_blank">emoji</a>.

You can also use markup in the help for the `username` CLI Argument.

And the same as before, the help text overwritten for the command `delete` can also use Rich Markup, the same in the CLI Argument and CLI Option.

If you run the program and check the help, you will see that **Typer** uses **Rich** internally to format the help.

Check the help for the `create` command:

<div class="termy">

```console
$ python main.py create --help

<b> </b><font color="#F4BF75"><b>Usage: </b></font><b>main.py create [OPTIONS] USERNAME                     </b>
<b>                                                                     </b>
 <font color="#A6E22E"><b>Create</b></font> a new <i>shiny</i> user. ✨
 This requires a <font color="#A5A5A1"><u style="text-decoration-style:single">username</u></font><font color="#A5A5A1">.                                           </font>

<font color="#A5A5A1">╭─ Arguments ───────────────────────────────────────────────────────╮</font>
<font color="#A5A5A1">│ </font><font color="#F92672">*</font>    username      <font color="#F4BF75"><b>TEXT</b></font>  The username to be <font color="#A6E22E">created</font>               │
<font color="#A5A5A1">│                          [default: None]                          │</font>
<font color="#A5A5A1">│                          </font><font color="#A6194C">[required]                </font>               │
<font color="#A5A5A1">╰───────────────────────────────────────────────────────────────────╯</font>
<font color="#A5A5A1">╭─ Options ─────────────────────────────────────────────────────────╮</font>
<font color="#A5A5A1">│ </font><font color="#A1EFE4"><b>--help</b></font>          Show this message and exit.                       │
<font color="#A5A5A1">╰───────────────────────────────────────────────────────────────────╯</font>
```

</div>

And check the help for the `delete` command:

<div class="termy">

```console
$ python main.py delete --help

<b> </b><font color="#F4BF75"><b>Usage: </b></font><b>main.py delete [OPTIONS] USERNAME                     </b>
<b>                                                                     </b>
 <font color="#F92672"><b>Delete</b></font> a user with <i>USERNAME</i>.

<font color="#A5A5A1">╭─ Arguments ───────────────────────────────────────────────────────╮</font>
<font color="#A5A5A1">│ </font><font color="#F92672">*</font>    username      <font color="#F4BF75"><b>TEXT</b></font>  The username to be <font color="#F92672">deleted</font>               │
<font color="#A5A5A1">│                          [default: None]                          │</font>
<font color="#A5A5A1">│                          </font><font color="#A6194C">[required]                </font>               │
<font color="#A5A5A1">╰───────────────────────────────────────────────────────────────────╯</font>
<font color="#A5A5A1">╭─ Options ─────────────────────────────────────────────────────────╮</font>
<font color="#A5A5A1">│ </font><font color="#A1EFE4"><b>--force</b></font>    <font color="#AE81FF"><b>--no-force</b></font>      Force the <font color="#F92672"><b>deletion</b></font> 💥                  │
<font color="#A5A5A1">│                            [default: no-force]                    │</font>
<font color="#A5A5A1">│ </font><font color="#A1EFE4"><b>--help</b></font>                     Show this message and exit.            │
<font color="#A5A5A1">╰───────────────────────────────────────────────────────────────────╯</font>
```

</div>

### Rich Markdown

If you set `rich_markup_mode="markdown"` when creating the `typer.Typer()` app, you will be able to use Markdown in the docstring:

{* docs_src/commands/help/tutorial005_an.py hl[4,9,12:20,25,27:28] *}

With that, you can use Markdown to format the text in the docstring for the command `create`, make the word "`create`" bold, show a list of items, and even use an <a href="https://rich.readthedocs.io/en/stable/markup.html#emoji" class="external-link" target="_blank">emoji</a>.

And the same as before, the help text overwritten for the command `delete` can also use Markdown.

Check the help for the `create` command:

<div class="termy">

```console
$ python main.py create --help

<b> </b><font color="#F4BF75"><b>Usage: </b></font><b>main.py create [OPTIONS] USERNAME                     </b>
<b>                                                                     </b>
 <b>Create</b> a new <i>shiny</i> user. ✨

 <font color="#F4BF75"><b> • </b></font><font color="#A5A5A1">Create a username                                                </font>
 <font color="#F4BF75"><b> • </b></font><font color="#A5A5A1">Show that the username is created                                </font>

 <font color="#F4BF75">───────────────────────────────────────────────────────────────────</font>
 Learn more at the <font color="#44919F">Typer docs website</font>

<font color="#A5A5A1">╭─ Arguments ───────────────────────────────────────────────────────╮</font>
<font color="#A5A5A1">│ </font><font color="#F92672">*</font>    username      <font color="#F4BF75"><b>TEXT</b></font>  The username to be <b>created</b>               │
<font color="#A5A5A1">│                          [default: None]                          │</font>
<font color="#A5A5A1">│                          </font><font color="#A6194C">[required]                              </font> │
<font color="#A5A5A1">╰───────────────────────────────────────────────────────────────────╯</font>
<font color="#A5A5A1">╭─ Options ─────────────────────────────────────────────────────────╮</font>
<font color="#A5A5A1">│ </font><font color="#A1EFE4"><b>--help</b></font>          Show this message and exit.                       │
<font color="#A5A5A1">╰───────────────────────────────────────────────────────────────────╯</font>
```

</div>

And the same for the `delete` command:

<div class="termy">

```console
$ python main.py delete --help

<b> </b><font color="#F4BF75"><b>Usage: </b></font><b>main.py delete [OPTIONS] USERNAME                     </b>
<b>                                                                     </b>
 <b>Delete</b> a user with <i>USERNAME</i>.

<font color="#A5A5A1">╭─ Arguments ───────────────────────────────────────────────────────╮</font>
<font color="#A5A5A1">│ </font><font color="#F92672">*</font>    username      <font color="#F4BF75"><b>TEXT</b></font>  The username to be <b>deleted</b>               │
<font color="#A5A5A1">│                          [default: None]                          │</font>
<font color="#A5A5A1">│                          </font><font color="#A6194C">[required]                              </font> │
<font color="#A5A5A1">╰───────────────────────────────────────────────────────────────────╯</font>
<font color="#A5A5A1">╭─ Options ─────────────────────────────────────────────────────────╮</font>
<font color="#A5A5A1">│ </font><font color="#A1EFE4"><b>--force</b></font>    <font color="#AE81FF"><b>--no-force</b></font>      Force the <b>deletion</b> 💥                  │
<font color="#A5A5A1">│                            [default: no-force]                    │</font>
<font color="#A5A5A1">│ </font><font color="#A1EFE4"><b>--help</b></font>                     Show this message and exit.            │
<font color="#A5A5A1">╰───────────────────────────────────────────────────────────────────╯</font>
```

</div>

/// info

Notice that in Markdown you cannot define colors. For colors you might prefer to use Rich markup.

///

## Help Panels

If you have many commands or CLI parameters, you might want to show their documentation in different panels when using the `--help` option.

If you installed <a href="https://rich.readthedocs.io/" class="external-link" target="_blank">Rich</a> as described in [Printing and Colors](../printing.md){.internal-link target=_blank}, you can configure the panel to use for each command or CLI parameter.

### Help Panels for Commands

To set the panel for a command you can pass the argument `rich_help_panel` with the name of the panel you want to use:

{* docs_src/commands/help/tutorial006.py hl[22,30,38,46] *}

Commands without a panel will be shown in the default panel `Commands`, and the rest will be shown in the next panels:

<div class="termy">

```console
$ python main.py --help

<b> </b><font color="#F4BF75"><b>Usage: </b></font><b>main.py [OPTIONS] COMMAND [ARGS]...                   </b>
<b>                                                                     </b>
<font color="#A5A5A1">╭─ Options ─────────────────────────────────────────────────────────╮</font>
<font color="#A5A5A1">│ </font><font color="#A1EFE4"><b>--install-completion</b></font>          Install completion for the current  │
<font color="#A5A5A1">│                               shell.                              │</font>
<font color="#A5A5A1">│ </font><font color="#A1EFE4"><b>--show-completion</b></font>             Show completion for the current     │
<font color="#A5A5A1">│                               shell, to copy it or customize the  │</font>
<font color="#A5A5A1">│                               installation.                       │</font>
<font color="#A5A5A1">│ </font><font color="#A1EFE4"><b>--help</b></font>                        Show this message and exit.         │
<font color="#A5A5A1">╰───────────────────────────────────────────────────────────────────╯</font>
<font color="#A5A5A1">╭─ Commands ────────────────────────────────────────────────────────╮</font>
<font color="#A5A5A1">│ </font><font color="#A1EFE4"><b>create          </b></font> <font color="#A6E22E">Create</font> a new user. ✨                            │
<font color="#A5A5A1">│ </font><font color="#A1EFE4"><b>delete          </b></font> <font color="#F92672">Delete</font> a user. 🔥                                │
<font color="#A5A5A1">╰───────────────────────────────────────────────────────────────────╯</font>
<font color="#A5A5A1">╭─ Utils and Configs ───────────────────────────────────────────────╮</font>
<font color="#A5A5A1">│ </font><font color="#A1EFE4"><b>config  </b></font> <font color="#66D9EF">Configure</font> the system. 🔧                                 │
<font color="#A5A5A1">│ </font><font color="#A1EFE4"><b>sync    </b></font> <font color="#66D9EF">Synchronize</font> the system or something fancy like that. ♻   │
<font color="#A5A5A1">╰───────────────────────────────────────────────────────────────────╯</font>
<font color="#A5A5A1">╭─ Help and Others ─────────────────────────────────────────────────╮</font>
<font color="#A5A5A1">│ </font><font color="#A1EFE4"><b>help         </b></font> Get <font color="#F4BF75">help</font> with the system. ❓                        │
<font color="#A5A5A1">│ </font><font color="#A1EFE4"><b>report       </b></font> <font color="#F4BF75">Report</font> an issue. 🐛                                 │
<font color="#A5A5A1">╰───────────────────────────────────────────────────────────────────╯</font>
```

</div>

### Help Panels for CLI Parameters

The same way, you can configure the panels for *CLI arguments* and *CLI options* with `rich_help_panel`.

And of course, in the same application you can also set the `rich_help_panel` for commands.

{* docs_src/commands/help/tutorial007_an.py hl[15,21,27,37] *}

Then if you run the application you will see all the *CLI parameters* in their respective panels.

* First the ***CLI arguments*** that don't have a panel name set in a **default** one named "`Arguments`".
* Next the ***CLI arguments*** with a **custom panel**. In this example named "`Secondary Arguments`".
* After that, the ***CLI options*** that don't have a panel in a **default** one named "`Options`".
* And finally, the ***CLI options*** with a **custom panel** set. In this example named "`Additional Data`".

You can check the `--help` option for the command `create`:

<div class="termy">

```console
$ python main.py create --help

<b> </b><font color="#F4BF75"><b>Usage: </b></font><b>main.py create [OPTIONS] USERNAME [LASTNAME]          </b>
<b>                                                                     </b>
 <font color="#A6E22E">Create</font> a new user. ✨

<font color="#A5A5A1">╭─ Arguments ───────────────────────────────────────────────────────╮</font>
<font color="#A5A5A1">│ </font><font color="#F92672">*</font>    username      <font color="#F4BF75"><b>TEXT</b></font>  The username to create [default: None]   │
<font color="#A5A5A1">│                          </font><font color="#A6194C">[required]            </font>                   │
<font color="#A5A5A1">╰───────────────────────────────────────────────────────────────────╯</font>
<font color="#A5A5A1">╭─ Secondary Arguments ─────────────────────────────────────────────╮</font>
<font color="#A5A5A1">│   lastname      </font><font color="#A37F4E"><b>[LASTNAME]</b></font>  The last name of the new user         │
<font color="#A5A5A1">╰───────────────────────────────────────────────────────────────────╯</font>
<font color="#A5A5A1">╭─ Options ─────────────────────────────────────────────────────────╮</font>
<font color="#A5A5A1">│ </font><font color="#A1EFE4"><b>--force</b></font>    <font color="#AE81FF"><b>--no-force</b></font>      Force the creation of the user         │
<font color="#A5A5A1">│                            [default: no-force]                    │</font>
<font color="#A5A5A1">│ </font><font color="#A1EFE4"><b>--help</b></font>                     Show this message and exit.            │
<font color="#A5A5A1">╰───────────────────────────────────────────────────────────────────╯</font>
<font color="#A5A5A1">╭─ Additional Data ─────────────────────────────────────────────────╮</font>
<font color="#A5A5A1">│ </font><font color="#A1EFE4"><b>--age</b></font>                   <font color="#F4BF75"><b>INTEGER</b></font>  The age of the new user          │
<font color="#A5A5A1">│                                  [default: None]                  │</font>
<font color="#A5A5A1">│ </font><font color="#A1EFE4"><b>--favorite-color</b></font>        <font color="#F4BF75"><b>TEXT   </b></font>  The favorite color of the new    │
<font color="#A5A5A1">│                                  user                             │</font>
<font color="#A5A5A1">│                                  [default: None]                  │</font>
<font color="#A5A5A1">╰───────────────────────────────────────────────────────────────────╯</font>
```

</div>

And of course, the `rich_help_panel` can be used in the same way for commands in the same application.

And those panels will be shown when you use the main `--help` option.

<div class="termy">

```console
$ python main.py --help

<b> </b><font color="#F4BF75"><b>Usage: </b></font><b>main.py [OPTIONS] COMMAND [ARGS]...                   </b>
<b>                                                                     </b>
<font color="#A5A5A1">╭─ Options ─────────────────────────────────────────────────────────╮</font>
<font color="#A5A5A1">│ </font><font color="#A1EFE4"><b>--install-completion</b></font>          Install completion for the current  │
<font color="#A5A5A1">│                               shell.                              │</font>
<font color="#A5A5A1">│ </font><font color="#A1EFE4"><b>--show-completion</b></font>             Show completion for the current     │
<font color="#A5A5A1">│                               shell, to copy it or customize the  │</font>
<font color="#A5A5A1">│                               installation.                       │</font>
<font color="#A5A5A1">│ </font><font color="#A1EFE4"><b>--help</b></font>                        Show this message and exit.         │
<font color="#A5A5A1">╰───────────────────────────────────────────────────────────────────╯</font>
<font color="#A5A5A1">╭─ Commands ────────────────────────────────────────────────────────╮</font>
<font color="#A5A5A1">│ </font><font color="#A1EFE4"><b>create          </b></font> <font color="#A6E22E">Create</font> a new user. ✨                            │
<font color="#A5A5A1">╰───────────────────────────────────────────────────────────────────╯</font>
<font color="#A5A5A1">╭─ Utils and Configs ───────────────────────────────────────────────╮</font>
<font color="#A5A5A1">│ </font><font color="#A1EFE4"><b>config         </b></font> <font color="#66D9EF">Configure</font> the system. 🔧                          │
<font color="#A5A5A1">╰───────────────────────────────────────────────────────────────────╯</font>
```

</div>

You can see the custom panel for the commands for "`Utils and Configs`".

## Epilog

If you need, you can also add an epilog section to the help of your commands:

{* docs_src/commands/help/tutorial008.py hl[6] *}

And when you check the `--help` option it will look like:

<div class="termy">

```console
$ python main.py --help

<b> </b><font color="#F4BF75"><b>Usage: </b></font><b>main.py [OPTIONS] USERNAME                            </b>
<b>                                                                     </b>
 <font color="#A6E22E">Create</font> a new user. ✨

<font color="#A5A5A1">╭─ Arguments ───────────────────────────────────────────────────────╮</font>
<font color="#A5A5A1">│ </font><font color="#F92672">*</font>    username      <font color="#F4BF75"><b>TEXT</b></font>  [default: None] <font color="#A6194C">[required]</font>               │
<font color="#A5A5A1">╰───────────────────────────────────────────────────────────────────╯</font>
<font color="#A5A5A1">╭─ Options ─────────────────────────────────────────────────────────╮</font>
<font color="#A5A5A1">│ </font><font color="#A1EFE4"><b>--install-completion</b></font>          Install completion for the current  │
<font color="#A5A5A1">│                               shell.                              │</font>
<font color="#A5A5A1">│ </font><font color="#A1EFE4"><b>--show-completion</b></font>             Show completion for the current     │
<font color="#A5A5A1">│                               shell, to copy it or customize the  │</font>
<font color="#A5A5A1">│                               installation.                       │</font>
<font color="#A5A5A1">│ </font><font color="#A1EFE4"><b>--help</b></font>                        Show this message and exit.         │
<font color="#A5A5A1">╰───────────────────────────────────────────────────────────────────╯</font>

 Made with ❤ in <font color="#66D9EF">Venus</font>
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