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✏️ Editing: __init__.py

import functools
import re
import string
import sys
import typing as t

if t.TYPE_CHECKING:
    import typing_extensions as te

class HasHTML(te.Protocol):
        def __html__(self) -> str:
            pass

_P = te.ParamSpec("_P")

__version__ = "2.1.3"

_strip_comments_re = re.compile(r"", re.DOTALL)
_strip_tags_re = re.compile(r"<.*?>", re.DOTALL)

def _simple_escaping_wrapper(func: "t.Callable[_P, str]") -> "t.Callable[_P, Markup]":
    @functools.wraps(func)
    def wrapped(self: "Markup", *args: "_P.args", **kwargs: "_P.kwargs") -> "Markup":
        arg_list = _escape_argspec(list(args), enumerate(args), self.escape)
        _escape_argspec(kwargs, kwargs.items(), self.escape)
        return self.__class__(func(self, *arg_list, **kwargs))  # type: ignore[arg-type]

return wrapped  # type: ignore[return-value]

class Markup(str):
    """A string that is ready to be safely inserted into an HTML or XML
    document, either because it was escaped or because it was marked
    safe.

Passing an object to the constructor converts it to text and wraps
    it to mark it safe without escaping. To escape the text, use the
    :meth:`escape` class method instead.

>>> Markup("Hello, World!")
 Markup('Hello, World!')
 >>> Markup(42)
 Markup('42')
 >>> Markup.escape("Hello, World!")
 Markup('Hello &lt;em&gt;World&lt;/em&gt;!')

This implements the ``__html__()`` interface that some frameworks
    use. Passing an object that implements ``__html__()`` will wrap the
    output of that method, marking it safe.

>>> class Foo:
 ... def __html__(self):
 ... return '<a href="/foo">foo</a>'
 ...
 >>> Markup(Foo())
 Markup('<a href="/foo">foo</a>')

This is a subclass of :class:`str`. It has the same methods, but
    escapes their arguments and returns a ``Markup`` instance.

>>> Markup("%s") % ("foo & bar",)
 Markup('foo &amp; bar')
 >>> Markup("Hello ") + "<foo>"
 Markup('Hello &lt;foo&gt;')
 """

__slots__ = ()

def __new__(
        cls, base: t.Any = "", encoding: t.Optional[str] = None, errors: str = "strict"
    ) -> "te.Self":
        if hasattr(base, "__html__"):
            base = base.__html__()

if encoding is None:
            return super().__new__(cls, base)

return super().__new__(cls, base, encoding, errors)

def __html__(self) -> "te.Self":
        return self

def __add__(self, other: t.Union[str, "HasHTML"]) -> "te.Self":
        if isinstance(other, str) or hasattr(other, "__html__"):
            return self.__class__(super().__add__(self.escape(other)))

return NotImplemented

def __radd__(self, other: t.Union[str, "HasHTML"]) -> "te.Self":
        if isinstance(other, str) or hasattr(other, "__html__"):
            return self.escape(other).__add__(self)

return NotImplemented

def __mul__(self, num: "te.SupportsIndex") -> "te.Self":
        if isinstance(num, int):
            return self.__class__(super().__mul__(num))

return NotImplemented

__rmul__ = __mul__

def __mod__(self, arg: t.Any) -> "te.Self":
        if isinstance(arg, tuple):
            # a tuple of arguments, each wrapped
            arg = tuple(_MarkupEscapeHelper(x, self.escape) for x in arg)
        elif hasattr(type(arg), "__getitem__") and not isinstance(arg, str):
            # a mapping of arguments, wrapped
            arg = _MarkupEscapeHelper(arg, self.escape)
        else:
            # a single argument, wrapped with the helper and a tuple
            arg = (_MarkupEscapeHelper(arg, self.escape),)

return self.__class__(super().__mod__(arg))

def __repr__(self) -> str:
        return f"{self.__class__.__name__}({super().__repr__()})"

def join(self, seq: t.Iterable[t.Union[str, "HasHTML"]]) -> "te.Self":
        return self.__class__(super().join(map(self.escape, seq)))

join.__doc__ = str.join.__doc__

def split(  # type: ignore[override]
        self, sep: t.Optional[str] = None, maxsplit: int = -1
    ) -> t.List["te.Self"]:
        return [self.__class__(v) for v in super().split(sep, maxsplit)]

split.__doc__ = str.split.__doc__

def rsplit(  # type: ignore[override]
        self, sep: t.Optional[str] = None, maxsplit: int = -1
    ) -> t.List["te.Self"]:
        return [self.__class__(v) for v in super().rsplit(sep, maxsplit)]

rsplit.__doc__ = str.rsplit.__doc__

def splitlines(  # type: ignore[override]
        self, keepends: bool = False
    ) -> t.List["te.Self"]:
        return [self.__class__(v) for v in super().splitlines(keepends)]

splitlines.__doc__ = str.splitlines.__doc__

def unescape(self) -> str:
        """Convert escaped markup back into a text string. This replaces
        HTML entities with the characters they represent.

>>> Markup("Main &raquo; About").unescape()
 'Main » About'
 """
 from html import unescape

return unescape(str(self))

def striptags(self) -> str:
        """:meth:`unescape` the markup, remove tags, and normalize
        whitespace to single spaces.

>>> Markup("Main &raquo;\tAbout").striptags()
 'Main » About'
 """
 # Use two regexes to avoid ambiguous matches.
 value = _strip_comments_re.sub("", self)
 value = _strip_tags_re.sub("", value)
 value = " ".join(value.split())
 return self.__class__(value).unescape()

@classmethod
    def escape(cls, s: t.Any) -> "te.Self":
        """Escape a string. Calls :func:`escape` and ensures that for
        subclasses the correct type is returned.
        """
        rv = escape(s)

if rv.__class__ is not cls:
            return cls(rv)

return rv  # type: ignore[return-value]

__getitem__ = _simple_escaping_wrapper(str.__getitem__)
    capitalize = _simple_escaping_wrapper(str.capitalize)
    title = _simple_escaping_wrapper(str.title)
    lower = _simple_escaping_wrapper(str.lower)
    upper = _simple_escaping_wrapper(str.upper)
    replace = _simple_escaping_wrapper(str.replace)
    ljust = _simple_escaping_wrapper(str.ljust)
    rjust = _simple_escaping_wrapper(str.rjust)
    lstrip = _simple_escaping_wrapper(str.lstrip)
    rstrip = _simple_escaping_wrapper(str.rstrip)
    center = _simple_escaping_wrapper(str.center)
    strip = _simple_escaping_wrapper(str.strip)
    translate = _simple_escaping_wrapper(str.translate)
    expandtabs = _simple_escaping_wrapper(str.expandtabs)
    swapcase = _simple_escaping_wrapper(str.swapcase)
    zfill = _simple_escaping_wrapper(str.zfill)
    casefold = _simple_escaping_wrapper(str.casefold)

if sys.version_info >= (3, 9):
        removeprefix = _simple_escaping_wrapper(str.removeprefix)
        removesuffix = _simple_escaping_wrapper(str.removesuffix)

def partition(self, sep: str) -> t.Tuple["te.Self", "te.Self", "te.Self"]:
        l, s, r = super().partition(self.escape(sep))
        cls = self.__class__
        return cls(l), cls(s), cls(r)

def rpartition(self, sep: str) -> t.Tuple["te.Self", "te.Self", "te.Self"]:
        l, s, r = super().rpartition(self.escape(sep))
        cls = self.__class__
        return cls(l), cls(s), cls(r)

def format(self, *args: t.Any, **kwargs: t.Any) -> "te.Self":
        formatter = EscapeFormatter(self.escape)
        return self.__class__(formatter.vformat(self, args, kwargs))

def format_map(  # type: ignore[override]
        self, map: t.Mapping[str, t.Any]
    ) -> "te.Self":
        formatter = EscapeFormatter(self.escape)
        return self.__class__(formatter.vformat(self, (), map))

def __html_format__(self, format_spec: str) -> "te.Self":
        if format_spec:
            raise ValueError("Unsupported format specification for Markup.")

return self

class EscapeFormatter(string.Formatter):
    __slots__ = ("escape",)

def __init__(self, escape: t.Callable[[t.Any], Markup]) -> None:
        self.escape = escape
        super().__init__()

def format_field(self, value: t.Any, format_spec: str) -> str:
        if hasattr(value, "__html_format__"):
            rv = value.__html_format__(format_spec)
        elif hasattr(value, "__html__"):
            if format_spec:
                raise ValueError(
                    f"Format specifier {format_spec} given, but {type(value)} does not"
                    " define __html_format__. A class that defines __html__ must define"
                    " __html_format__ to work with format specifiers."
                )
            rv = value.__html__()
        else:
            # We need to make sure the format spec is str here as
            # otherwise the wrong callback methods are invoked.
            rv = string.Formatter.format_field(self, value, str(format_spec))
        return str(self.escape(rv))

_ListOrDict = t.TypeVar("_ListOrDict", list, dict)

def _escape_argspec(
    obj: _ListOrDict, iterable: t.Iterable[t.Any], escape: t.Callable[[t.Any], Markup]
) -> _ListOrDict:
    """Helper for various string-wrapped functions."""
    for key, value in iterable:
        if isinstance(value, str) or hasattr(value, "__html__"):
            obj[key] = escape(value)

return obj

class _MarkupEscapeHelper:
    """Helper for :meth:`Markup.__mod__`."""

__slots__ = ("obj", "escape")

def __init__(self, obj: t.Any, escape: t.Callable[[t.Any], Markup]) -> None:
        self.obj = obj
        self.escape = escape

def __getitem__(self, item: t.Any) -> "te.Self":
        return self.__class__(self.obj[item], self.escape)

def __str__(self) -> str:
        return str(self.escape(self.obj))

def __repr__(self) -> str:
        return str(self.escape(repr(self.obj)))

def __int__(self) -> int:
        return int(self.obj)

def __float__(self) -> float:
        return float(self.obj)

# circular import
try:
    from ._speedups import escape as escape
    from ._speedups import escape_silent as escape_silent
    from ._speedups import soft_str as soft_str
except ImportError:
    from ._native import escape as escape
    from ._native import escape_silent as escape_silent  # noqa: F401
    from ._native import soft_str as soft_str  # noqa: F401

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