ales-erjavec

"""
An experiment to fix PyQt QObject.tr context override

https://www.riverbankcomputing.com/static/Docs/PyQt5/i18n.html#differences-between-pyqt5-and-qt


.. note::

    Known deficiencies:
       * No support for @property, @pyQtSlot, etc. decorators

ales-erjavec

from functools import singledispatch


def singledispatch_next(f):
    """
    Decorate a `singledispatch` function f with a `next` method.

    `f.next(__class__)` dispatches to the 'base' or next implementation in
    the __class__'s mro chain.

ales-erjavec

"""
Read the IDX file format as described by http://yann.lecun.com/exdb/mnist/
"""
import os
import io
import struct
import mmap
from functools import reduce
from typing import IO, Tuple, Union

ales-erjavec

from typing import overload, Union, Type, TypeVar, Any
from functools import lru_cache

from PyQt5.QtCore import QObject, pyqtProperty as Property


@lru_cache(maxsize=200)
def _converter(type_: Union[type, str]):
    class Obj(QObject):
        __slots__ = ("field",)

ales-erjavec

from PyQt5.QtCore import QObject, pyqtProperty


class Q_Property(pyqtProperty):
    """
    A descriptor that more closely resembles the Q_PROPERTY macro.

    Encourage a coding style which is consistent with Qt.

    Example:

ales-erjavec

"""
DataType
--------

A NamedTuple like class except it also defines strict type dependent
__eq__, __ne__  and __hash__. This ensures that instances can be compared,
hashed in dict, sets, ... I.e.

Example
-------

ales-erjavec

from typing import Iterable

from PyQt5.QtWidgets import QListView, QLineEdit
from PyQt5.QtGui import QResizeEvent
from PyQt5.QtCore import (
    Qt, QAbstractItemModel, QModelIndex, QSortFilterProxyModel, QItemSelection
)


class FilterListView(QListView):

ales-erjavec

import time
from types import SimpleNamespace
from threading import Event
from concurrent.futures.thread import ThreadPoolExecutor

from PyQt5.QtCore import (
    Qt, QObject, QCoreApplication, QTimer, QEventLoop, pyqtSignal
)

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from typing import Optional

from PyQt5.QtCore import Qt, QPointF, QRectF
from PyQt5.QtGui import QStaticText, QFont, QPalette, QPainter, QTransform
from PyQt5.QtWidgets import QGraphicsObject, QWidget, QStyleOptionGraphicsItem


class StaticTextItem(QGraphicsObject):
    """
    A text graphics object for displaying text in a QGraphicsScene.

ales-erjavec

#include <stdio.h>
#include <limits.h> 
#include <assert.h>

int mod(int a, int b) {
    int res;
    if (b < 0) {
        // because -INT_MIN == INT_MIN
        if (b > INT_MIN) {
            return -mod(-a, -b);