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✏️ able.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]

Batal

⬅ site-packages 20 item

Nama	Tipe	Ukuran	Diubah	Aksi
📁__pycache__	dir	—	2026-03-11 18:53	📂 Buka
🐍__init__.py	py	1.4 KB	2026-01-20 12:58	✏️ 👁️
📄__init__.pyi	pyi	7 KB	2026-01-20 12:58	✏️ 👁️
🐍_checked_types.py	py	17.9 KB	2026-01-20 12:58	✏️ 👁️
🐍_field_common.py	py	11.7 KB	2026-01-20 12:58	✏️ 👁️
🐍_helpers.py	py	3.2 KB	2026-01-20 12:58	✏️ 👁️
🐍_immutable.py	py	3.2 KB	2026-01-20 12:58	✏️ 👁️
🐍_pbag.py	py	6.6 KB	2026-01-20 12:58	✏️ 👁️
🐍_pclass.py	py	9.5 KB	2026-01-20 12:58	✏️ 👁️
🐍_pdeque.py	py	11.9 KB	2026-01-20 12:58	✏️ 👁️
🐍_plist.py	py	8.1 KB	2026-01-20 12:58	✏️ 👁️
🐍_pmap.py	py	18.3 KB	2026-01-20 12:58	✏️ 👁️
🐍_precord.py	py	6.9 KB	2026-01-20 12:58	✏️ 👁️
🐍_pset.py	py	5.6 KB	2026-01-20 12:58	✏️ 👁️
🐍_pvector.py	py	22.2 KB	2026-01-20 12:58	✏️ 👁️
🐍_toolz.py	py	3.3 KB	2026-01-20 12:58	✏️ 👁️
🐍_transformations.py	py	3.7 KB	2026-01-20 12:58	✏️ 👁️
📄py.typed	typed	0 B	2026-01-20 12:58	✏️ 👁️
🐍typing.py	py	1.7 KB	2026-01-20 12:58	✏️ 👁️
📄typing.pyi	pyi	10.2 KB	2026-01-20 12:58	✏️ 👁️

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