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__init__.py	file	1,479 B	0644	2026-07-20 00:00:00	edit
__init__.pyi	file	7,188 B	0644	2026-07-20 00:00:00	edit
_checked_types.py	file	18,372 B	0644	2026-07-20 00:00:00	edit
_field_common.py	file	11,963 B	0644	2026-07-20 00:00:00	edit
_helpers.py	file	3,232 B	0644	2026-07-20 00:00:00	edit
_immutable.py	file	3,287 B	0644	2026-07-20 00:00:00	edit
_pbag.py	file	6,730 B	0644	2026-07-20 00:00:00	edit
_pclass.py	file	9,702 B	0644	2026-07-20 00:00:00	edit
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_plist.py	file	8,293 B	0644	2026-07-20 00:00:00	edit
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_pset.py	file	5,693 B	0644	2026-07-20 00:00:00	edit
_pvector.py	file	22,694 B	0644	2026-07-20 00:00:00	edit
_toolz.py	file	3,425 B	0644	2026-07-20 00:00:00	edit
_transformations.py	file	3,800 B	0644	2026-07-20 00:00:00	edit
py.typed	file	0 B	0644	2026-07-20 00:00:00	edit
typing.py	file	1,767 B	0644	2026-07-20 00:00:00	edit
typing.pyi	file	10,416 B	0644	2026-07-20 00:00:00	edit

editing: _immutable.py

import sys

def immutable(members='', name='Immutable', verbose=False):
    """
    Produces a class that either can be used standalone or as a base class for persistent classes.

This is a thin wrapper around a named tuple.

Constructing a type and using it to instantiate objects:

>>> Point = immutable('x, y', name='Point')
    >>> p = Point(1, 2)
    >>> p2 = p.set(x=3)
    >>> p
    Point(x=1, y=2)
    >>> p2
    Point(x=3, y=2)

Inheriting from a constructed type. In this case no type name needs to be supplied:

>>> class PositivePoint(immutable('x, y')):
    ...     __slots__ = tuple()
    ...     def __new__(cls, x, y):
    ...         if x > 0 and y > 0:
    ...             return super(PositivePoint, cls).__new__(cls, x, y)
    ...         raise Exception('Coordinates must be positive!')
    ...
    >>> p = PositivePoint(1, 2)
    >>> p.set(x=3)
    PositivePoint(x=3, y=2)
    >>> p.set(y=-3)
    Traceback (most recent call last):
    Exception: Coordinates must be positive!

The persistent class also supports the notion of frozen members. The value of a frozen member
    cannot be updated. For example it could be used to implement an ID that should remain the same
    over time. A frozen member is denoted by a trailing underscore.

>>> Point = immutable('x, y, id_', name='Point')
    >>> p = Point(1, 2, id_=17)
    >>> p.set(x=3)
    Point(x=3, y=2, id_=17)
    >>> p.set(id_=18)
    Traceback (most recent call last):
    AttributeError: Cannot set frozen members id_
    """

if isinstance(members, str):
        members = members.replace(',', ' ').split()

def frozen_member_test():
        frozen_members = ["'%s'" % f for f in members if f.endswith('_')]
        if frozen_members:
            return """
        frozen_fields = fields_to_modify & set([{frozen_members}])
        if frozen_fields:
            raise AttributeError('Cannot set frozen members %s' % ', '.join(frozen_fields))
            """.format(frozen_members=', '.join(frozen_members))

return ''

quoted_members = ', '.join("'%s'" % m for m in members)
    template = """
class {class_name}(namedtuple('ImmutableBase', [{quoted_members}])):
    __slots__ = tuple()

def __repr__(self):
        return super({class_name}, self).__repr__().replace('ImmutableBase', self.__class__.__name__)

def set(self, **kwargs):
        if not kwargs:
            return self

fields_to_modify = set(kwargs.keys())
        if not fields_to_modify <= {member_set}:
            raise AttributeError("'%s' is not a member" % ', '.join(fields_to_modify - {member_set}))

{frozen_member_test}

return self.__class__.__new__(self.__class__, *map(kwargs.pop, [{quoted_members}], self))
""".format(quoted_members=quoted_members,
               member_set="set([%s])" % quoted_members if quoted_members else 'set()',
               frozen_member_test=frozen_member_test(),
               class_name=name)

if verbose:
        print(template)

from collections import namedtuple
    namespace = dict(namedtuple=namedtuple, __name__='pyrsistent_immutable')
    try:
        exec(template, namespace)
    except SyntaxError as e:
        raise SyntaxError(str(e) + ':\n' + template) from e

return namespace[name]

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