Module `hoshmap.value.entry`

Expand source code

#  Copyright (c) 2021. Davi Pereira dos Santos
#  This file is part of the hoshmap project.
#  Please respect the license - more about this in the section (*) below.
#
#  hoshmap is free software: you can redistribute it and/or modify
#  it under the terms of the GNU General Public License as published by
#  the Free Software Foundation, either version 3 of the License, or
#  (at your option) any later version.
#
#  hoshmap is distributed in the hope that it will be useful,
#  but WITHOUT ANY WARRANTY; without even the implied warranty of
#  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#  GNU General Public License for more details.
#
#  You should have received a copy of the GNU General Public License
#  along with hoshmap.  If not, see <http://www.gnu.org/licenses/>.
#
#  (*) Removing authorship by any means, e.g. by distribution of derived
#  works or verbatim, obfuscated, compiled or rewritten versions of any
#  part of this work is illegal and it is unethical regarding the effort and
#  time spent here.
#
from functools import cached_property
from typing import Any

from hosh import Hosh


class Entry:
    value: Any
    hosh: Hosh

    @cached_property
    def id(self):
        return self.hosh.id

    def __mul__(self, other):
        return self.hosh * (other if isinstance(other, Hosh) else other.hosh)

    def __rmul__(self, other):
        return (other if isinstance(other, Hosh) else other.hosh) * self.hosh

    # @staticmethod
    # def handle_id(id):
    #     """
    #     >>> iVal.handle_id("sduityv76453rjhgv7utfgsdfkhsdfsdfgi7tgsg").id
    #     'sduityv76453rjhgv7utfgsdfkhsdfsdfgi7tgsg'
    #     >>> from hosh import Hosh
    #     >>> iVal.handle_id(Hosh.fromid("sduityv76453rjhgv7utfgsdfkhsdfsdfgi7tgsg")).id
    #     'sduityv76453rjhgv7utfgsdfkhsdfsdfgi7tgsg'
    #     """
    #     if isinstance(id, str):
    #         return Hosh.fromid(id)
    #     elif isinstance(id, Hosh):
    #         return id
    #     else:  # pragma: no cover
    #         raise Exception(f"Wrong id type: {type(id)}")
    # @property
    # def isevaluated(self):
    #     from hoshmap.value.lazyival import Unevaluated
    #
    #     return self.results[self.id] is not Unevaluated
    #
    # def evaluate(self):
    #     val = self.value
    #     from hoshmap import Idict, FrozenIdict
    #
    #     if isinstance(val, (Idict, FrozenIdict)):
    #         val.evaluate()

Classes

class Entry

Expand source code

class Entry:
    value: Any
    hosh: Hosh

    @cached_property
    def id(self):
        return self.hosh.id

    def __mul__(self, other):
        return self.hosh * (other if isinstance(other, Hosh) else other.hosh)

    def __rmul__(self, other):
        return (other if isinstance(other, Hosh) else other.hosh) * self.hosh

    # @staticmethod
    # def handle_id(id):
    #     """
    #     >>> iVal.handle_id("sduityv76453rjhgv7utfgsdfkhsdfsdfgi7tgsg").id
    #     'sduityv76453rjhgv7utfgsdfkhsdfsdfgi7tgsg'
    #     >>> from hosh import Hosh
    #     >>> iVal.handle_id(Hosh.fromid("sduityv76453rjhgv7utfgsdfkhsdfsdfgi7tgsg")).id
    #     'sduityv76453rjhgv7utfgsdfkhsdfsdfgi7tgsg'
    #     """
    #     if isinstance(id, str):
    #         return Hosh.fromid(id)
    #     elif isinstance(id, Hosh):
    #         return id
    #     else:  # pragma: no cover
    #         raise Exception(f"Wrong id type: {type(id)}")
    # @property
    # def isevaluated(self):
    #     from hoshmap.value.lazyival import Unevaluated
    #
    #     return self.results[self.id] is not Unevaluated
    #
    # def evaluate(self):
    #     val = self.value
    #     from hoshmap import Idict, FrozenIdict
    #
    #     if isinstance(val, (Idict, FrozenIdict)):
    #         val.evaluate()

Class variables

var hosh : hosh.hosh_.Hosh
var value : Any

Instance variables

var id

Expand source code

def __get__(self, instance, owner=None):
    if instance is None:
        return self
    if self.attrname is None:
        raise TypeError(
            "Cannot use cached_property instance without calling __set_name__ on it.")
    try:
        cache = instance.__dict__
    except AttributeError:  # not all objects have __dict__ (e.g. class defines slots)
        msg = (
            f"No '__dict__' attribute on {type(instance).__name__!r} "
            f"instance to cache {self.attrname!r} property."
        )
        raise TypeError(msg) from None
    val = cache.get(self.attrname, _NOT_FOUND)
    if val is _NOT_FOUND:
        with self.lock:
            # check if another thread filled cache while we awaited lock
            val = cache.get(self.attrname, _NOT_FOUND)
            if val is _NOT_FOUND:
                val = self.func(instance)
                try:
                    cache[self.attrname] = val
                except TypeError:
                    msg = (
                        f"The '__dict__' attribute on {type(instance).__name__!r} instance "
                        f"does not support item assignment for caching {self.attrname!r} property."
                    )
                    raise TypeError(msg) from None
    return val