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Name	Size	Permission	Date
__pycache__	[ DIR ]	drwxr-xr-x	2026-06-08 18:08
__init__.py	2.01 KB	-rw-r--r--	1980-01-01 08:00
__init__.pyi	11.04 KB	-rw-r--r--	1980-01-01 08:00
_cmp.py	4.02 KB	-rw-r--r--	1980-01-01 08:00
_cmp.pyi	368 B	-rw-r--r--	1980-01-01 08:00
_compat.py	2.76 KB	-rw-r--r--	1980-01-01 08:00
_config.py	843 B	-rw-r--r--	1980-01-01 08:00
_funcs.py	16.09 KB	-rw-r--r--	1980-01-01 08:00
_make.py	101.7 KB	-rw-r--r--	1980-01-01 08:00
_next_gen.py	25.66 KB	-rw-r--r--	1980-01-01 08:00
_typing_compat.pyi	469 B	-rw-r--r--	1980-01-01 08:00
_version_info.py	2.17 KB	-rw-r--r--	1980-01-01 08:00
_version_info.pyi	209 B	-rw-r--r--	1980-01-01 08:00
converters.py	3.77 KB	-rw-r--r--	1980-01-01 08:00
converters.pyi	643 B	-rw-r--r--	1980-01-01 08:00
exceptions.py	1.93 KB	-rw-r--r--	1980-01-01 08:00
exceptions.pyi	539 B	-rw-r--r--	1980-01-01 08:00
filters.py	1.75 KB	-rw-r--r--	1980-01-01 08:00
filters.pyi	208 B	-rw-r--r--	1980-01-01 08:00
py.typed	0 B	-rw-r--r--	1980-01-01 08:00
setters.py	1.58 KB	-rw-r--r--	1980-01-01 08:00
setters.pyi	584 B	-rw-r--r--	1980-01-01 08:00
validators.py	20.96 KB	-rw-r--r--	1980-01-01 08:00
validators.pyi	3.99 KB	-rw-r--r--	1980-01-01 08:00

Rename

# SPDX-License-Identifier: MIT

"""
Commonly used hooks for on_setattr.
"""

from . import _config
from .exceptions import FrozenAttributeError

def pipe(*setters):
    """
    Run all *setters* and return the return value of the last one.

.. versionadded:: 20.1.0
    """

def wrapped_pipe(instance, attrib, new_value):
        rv = new_value

for setter in setters:
            rv = setter(instance, attrib, rv)

return rv

return wrapped_pipe

def frozen(_, __, ___):
    """
    Prevent an attribute to be modified.

.. versionadded:: 20.1.0
    """
    raise FrozenAttributeError

def validate(instance, attrib, new_value):
    """
    Run *attrib*'s validator on *new_value* if it has one.

.. versionadded:: 20.1.0
    """
    if _config._run_validators is False:
        return new_value

v = attrib.validator
    if not v:
        return new_value

v(instance, attrib, new_value)

return new_value

def convert(instance, attrib, new_value):
    """
    Run *attrib*'s converter -- if it has one -- on *new_value* and return the
    result.

.. versionadded:: 20.1.0
    """
    c = attrib.converter
    if c:
        # This can be removed once we drop 3.8 and use attrs.Converter instead.
        from ._make import Converter

if not isinstance(c, Converter):
            return c(new_value)

return c(new_value, instance, attrib)

return new_value

# Sentinel for disabling class-wide *on_setattr* hooks for certain attributes.
# Sphinx's autodata stopped working, so the docstring is inlined in the API
# docs.
NO_OP = object()