[BUG]

[cvk77]

• I've checked docs and closed issues for possible solutions.
• I can't find my issue in the FAQ.

Classes that implement a __rich__-method aren't rendered correctly in tables:

Example

from rich.console import Console
from rich.table import Table


class Employee:
    name: str

    def __init__(self, name: str) -> None:
        self.name = name

    def __rich__(self):
        return self.name


console = Console()

table = Table()
table.add_column("Name", no_wrap=True)
table.add_column("Age")

table.add_row(Employee("John Doe"), "42")

console.print(table)

Yields this result:

┏━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┳┓
┃ Name                                                    ┃┃
┡━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━╇┩
│ John Doe                                                ││
└─────────────────────────────────────────────────────────┴┘

Removing no_wrap=True renders at least the second column, but makes the Name column to wide:

┏━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┳━━━━━┓
┃ Name                                               ┃ Age ┃
┡━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━╇━━━━━┩
│ John Doe                                           │ 42  │
└────────────────────────────────────────────────────┴─────┘

Calling Employee("John Doe").__rich__() explicitly gives the expected result:

┏━━━━━━━━━━┳━━━━━┓
┃ Name     ┃ Age ┃
┡━━━━━━━━━━╇━━━━━┩
│ John Doe │ 42  │
└──────────┴─────┘

Click to expand

rich==13.6.0

╭───────────────────────── <class 'rich.console.Console'> ─────────────────────────╮
│ A high level console interface.                                                  │
│                                                                                  │
│ ╭──────────────────────────────────────────────────────────────────────────────╮ │
│ │ <console width=177 ColorSystem.TRUECOLOR>                                    │ │
│ ╰──────────────────────────────────────────────────────────────────────────────╯ │
│                                                                                  │
│     color_system = 'truecolor'                                                   │
│         encoding = 'utf-8'                                                       │
│             file = <_io.TextIOWrapper name='<stdout>' mode='w' encoding='utf-8'> │
│           height = 49                                                            │
│    is_alt_screen = False                                                         │
│ is_dumb_terminal = False                                                         │
│   is_interactive = True                                                          │
│       is_jupyter = False                                                         │
│      is_terminal = True                                                          │
│   legacy_windows = False                                                         │
│         no_color = False                                                         │
│          options = ConsoleOptions(                                               │
│                        size=ConsoleDimensions(width=177, height=49),             │
│                        legacy_windows=False,                                     │
│                        min_width=1,                                              │
│                        max_width=177,                                            │
│                        is_terminal=True,                                         │
│                        encoding='utf-8',                                         │
│                        max_height=49,                                            │
│                        justify=None,                                             │
│                        overflow=None,                                            │
│                        no_wrap=False,                                            │
│                        highlight=None,                                           │
│                        markup=None,                                              │
│                        height=None                                               │
│                    )                                                             │
│            quiet = False                                                         │
│           record = False                                                         │
│         safe_box = True                                                          │
│             size = ConsoleDimensions(width=177, height=49)                       │
│        soft_wrap = False                                                         │
│           stderr = False                                                         │
│            style = None                                                          │
│         tab_size = 8                                                             │
│            width = 177                                                           │
╰──────────────────────────────────────────────────────────────────────────────────╯
╭─── <class 'rich._windows.WindowsConsoleFeatures'> ────╮
│ Windows features available.                           │
│                                                       │
│ ╭───────────────────────────────────────────────────╮ │
│ │ WindowsConsoleFeatures(vt=False, truecolor=False) │ │
│ ╰───────────────────────────────────────────────────╯ │
│                                                       │
│ truecolor = False                                     │
│        vt = False                                     │
╰───────────────────────────────────────────────────────╯
╭────── Environment Variables ───────╮
│ {                                  │
│     'TERM': 'xterm-256color',      │
│     'COLORTERM': 'truecolor',      │
│     'CLICOLOR': None,              │
│     'NO_COLOR': None,              │
│     'TERM_PROGRAM': 'iTerm.app',   │
│     'COLUMNS': None,               │
│     'LINES': None,                 │
│     'JUPYTER_COLUMNS': None,       │
│     'JUPYTER_LINES': None,         │
│     'JPY_PARENT_PID': None,        │
│     'VSCODE_VERBOSE_LOGGING': None │
│ }                                  │
╰────────────────────────────────────╯
platform="Darwin"

[github-actions]

Thank you for your issue. Give us a little time to review it.

PS. You might want to check the FAQ if you haven't done so already.

This is an automated reply, generated by FAQtory

[TomJGooding]

From https://rich.readthedocs.io/en/stable/protocol.html#measuring-renderables

Sometimes Rich needs to know how many characters an object will take up when rendering. The Table class, for instance, will use this information to calculate the optimal dimensions for the columns... you will need to supply a __rich_measure__ method...

This doesn't seem to work with a simple __rich__ method so perhaps this should be clarified in the docs, but it does work with __rich__console__.

from rich.console import Console, ConsoleOptions, RenderResult
from rich.measure import Measurement
from rich.table import Table


class Employee:
    def __init__(self, name: str) -> None:
        self.name = name

    def __rich_console__(
        self, console: Console, options: ConsoleOptions
    ) -> RenderResult:
        yield self.name

    def __rich_measure__(
        self, console: Console, options: ConsoleOptions
    ) -> Measurement:
        return Measurement(len(self.name), len(self.name))


console = Console()

table = Table()
table.add_column("Name", no_wrap=True)
table.add_column("Age")
table.add_row(Employee("John Doe"), "42")

console.print(table)

[github-actions]

I hope we solved your problem.

If you like using Rich, you might also enjoy Textual