Class Theme

Lib/_colorize.py:211–255

A suite of themes for all sections of Python. When adding a new one, remember to also modify `copy_with` and `no_colors` below.

@dataclass(frozen=True)
class Theme:
    """A suite of themes for all sections of Python.

    When adding a new one, remember to also modify `copy_with` and `no_colors`
    below.
    """
    argparse: Argparse = field(default_factory=Argparse)
    syntax: Syntax = field(default_factory=Syntax)
    traceback: Traceback = field(default_factory=Traceback)
    unittest: Unittest = field(default_factory=Unittest)

    def copy_with(
        self,
        *,
        argparse: Argparse | None = None,
        syntax: Syntax | None = None,
        traceback: Traceback | None = None,
        unittest: Unittest | None = None,
    ) -> Self:
        """Return a new Theme based on this instance with some sections replaced.

        Themes are immutable to protect against accidental modifications that
        could lead to invalid terminal states.
        """
        return type(self)(
            argparse=argparse or self.argparse,
            syntax=syntax or self.syntax,
            traceback=traceback or self.traceback,
            unittest=unittest or self.unittest,
        )

    @classmethod
    def no_colors(cls) -> Self:
        """Return a new Theme where colors in all sections are empty strings.

        This allows writing user code as if colors are always used. The color
        fields will be ANSI color code strings when colorization is desired
        and possible, and empty strings otherwise.
        """
        return cls(
            argparse=Argparse.no_colors(),
            syntax=Syntax.no_colors(),
            traceback=Traceback.no_colors(),
            unittest=Unittest.no_colors(),
        )


def get_colors(