AttributeError: 'Ui_MainWindow' object has no attribute 'frame_left_menu'[SOLVED]

Flare · 9 Mar 2022, 07:29

# Form implementation generated from reading ui file 'main.ui'
#
# Created by: PyQt6 UI code generator 6.3.1
#
# WARNING: Any manual changes made to this file will be lost when pyuic6 is
# run again.  Do not edit this file unless you know what you are doing.


from PyQt6 import QtCore, QtGui, QtWidgets
from PyQt6.QtCore import QPropertyAnimation


class Ui_MainWindow(object):
    def __init__(self):
        super().__init__()
        self.animation = None

    def setupUi(self, MainWindow):

        MainWindow.setObjectName("MainWindow")
        MainWindow.resize(1000, 600)
        MainWindow.setMinimumSize(QtCore.QSize(1000, 500))
        MainWindow.setStyleSheet("background-color: rgb(45, 45, 45);")

        self.centralwidget = QtWidgets.QWidget(MainWindow)
        self.centralwidget.setObjectName("centralwidget")

        self.verticalLayout = QtWidgets.QVBoxLayout(self.centralwidget)
        self.verticalLayout.setContentsMargins(0, 0, 0, 0)
        self.verticalLayout.setSpacing(0)
        self.verticalLayout.setObjectName("verticalLayout")

        self.top_bar = QtWidgets.QFrame(self.centralwidget)
        self.top_bar.setMaximumSize(QtCore.QSize(16777215, 40))
        self.top_bar.setStyleSheet("background-color: rgb(35, 35, 35);")
        self.top_bar.setFrameShape(QtWidgets.QFrame.Shape.NoFrame)
        self.top_bar.setFrameShadow(QtWidgets.QFrame.Shadow.Raised)
        self.top_bar.setObjectName("top_bar")

        self.horizontalLayout = QtWidgets.QHBoxLayout(self.top_bar)
        self.horizontalLayout.setContentsMargins(0, 0, 0, 0)
        self.horizontalLayout.setSpacing(0)
        self.horizontalLayout.setObjectName("horizontalLayout")

        self.toggle_frame = QtWidgets.QFrame(self.top_bar)
        self.toggle_frame.setMaximumSize(QtCore.QSize(70, 40))
        self.toggle_frame.setStyleSheet("background-color: rgb(62, 187, 255);")
        self.toggle_frame.setFrameShape(QtWidgets.QFrame.Shape.NoFrame)
        self.toggle_frame.setFrameShadow(QtWidgets.QFrame.Shadow.Raised)
        self.toggle_frame.setObjectName("toggle_frame")

        self.verticalLayout_2 = QtWidgets.QVBoxLayout(self.toggle_frame)
        self.verticalLayout_2.setContentsMargins(0, 0, 0, 0)
        self.verticalLayout_2.setSpacing(0)
        self.verticalLayout_2.setObjectName("verticalLayout_2")

        self.btn_toggle = QtWidgets.QPushButton(self.toggle_frame)
        sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Policy.Expanding,
                                           QtWidgets.QSizePolicy.Policy.Expanding)
        sizePolicy.setHorizontalStretch(0)
        sizePolicy.setVerticalStretch(0)
        sizePolicy.setHeightForWidth(self.btn_toggle.sizePolicy().hasHeightForWidth())
        self.btn_toggle.setSizePolicy(sizePolicy)
        self.btn_toggle.setStyleSheet("QPushbutton{\n"
                                      "    color: rgb(255, 255, 255);\n"
                                      "    border: 0px solid;\n"
                                      "}\n"
                                      "\n"
                                      "QPushButton:hover{\n"
                                      "    \n"
                                      "    background-color: qlineargradient(spread:pad, x1:0, y1:0, x2:0.744, y2:0.869818, stop:0 rgba(0, 111, 255, 255), stop:1 rgba(102, 255, 176, 255));\n"
                                      "}")
        self.btn_toggle.setObjectName("btn_toggle")
        self.btn_toggle.clicked.connect(self.toggle_clicked(140, True))

        self.verticalLayout_2.addWidget(self.btn_toggle)
        self.horizontalLayout.addWidget(self.toggle_frame)
        self.top_frame = QtWidgets.QFrame(self.top_bar)
        self.top_frame.setMaximumSize(QtCore.QSize(16777215, 40))
        self.top_frame.setFrameShape(QtWidgets.QFrame.Shape.StyledPanel)
        self.top_frame.setFrameShadow(QtWidgets.QFrame.Shadow.Raised)
        self.top_frame.setObjectName("top_frame")
        self.horizontalLayout.addWidget(self.top_frame)
        self.verticalLayout.addWidget(self.top_bar)
        self.content = QtWidgets.QFrame(self.centralwidget)
        self.content.setFrameShape(QtWidgets.QFrame.Shape.NoFrame)
        self.content.setFrameShadow(QtWidgets.QFrame.Shadow.Raised)
        self.content.setObjectName("content")
        self.horizontalLayout_2 = QtWidgets.QHBoxLayout(self.content)
        self.horizontalLayout_2.setContentsMargins(0, 0, 0, 0)
        self.horizontalLayout_2.setSpacing(0)
        self.horizontalLayout_2.setObjectName("horizontalLayout_2")
        self.frame_left_menu = QtWidgets.QFrame(self.content)
        self.frame_left_menu.setMinimumSize(QtCore.QSize(70, 0))
        self.frame_left_menu.setMaximumSize(QtCore.QSize(70, 16777215))
        self.frame_left_menu.setStyleSheet("background-color: rgb(35, 35, 35);")
        self.frame_left_menu.setFrameShape(QtWidgets.QFrame.Shape.StyledPanel)
        self.frame_left_menu.setFrameShadow(QtWidgets.QFrame.Shadow.Raised)
        self.frame_left_menu.setObjectName("frame_left_menu")
        self.verticalLayout_3 = QtWidgets.QVBoxLayout(self.frame_left_menu)
        self.verticalLayout_3.setContentsMargins(0, 0, 0, 0)
        self.verticalLayout_3.setSpacing(0)
        self.verticalLayout_3.setObjectName("verticalLayout_3")
        self.frame_left_buttons = QtWidgets.QFrame(self.frame_left_menu)
        self.frame_left_buttons.setFrameShadow(QtWidgets.QFrame.Shadow.Raised)
        self.frame_left_buttons.setObjectName("frame_left_buttons")
        self.verticalLayout_4 = QtWidgets.QVBoxLayout(self.frame_left_buttons)
        self.verticalLayout_4.setContentsMargins(0, 0, 0, 0)
        self.verticalLayout_4.setSpacing(0)
        self.verticalLayout_4.setObjectName("verticalLayout_4")
        self.pushButton_2 = QtWidgets.QPushButton(self.frame_left_buttons)
        self.pushButton_2.setMinimumSize(QtCore.QSize(0, 40))
        self.pushButton_2.setStyleSheet("QPushButton{\n"
                                        "    \n"
                                        "    background-color: rgb(45, 45, 45);\n"
                                        "    color: rgb(255, 255, 255);\n"
                                        "    border: 1px rgb(255, 255, 255) solid;\n"
                                        "}\n"
                                        "\n"
                                        "QPushButton:hover{\n"
                                        "    \n"
                                        "    background-color: rgb(85, 175, 255);\n"
                                        "}")
        self.pushButton_2.setObjectName("pushButton_2")
        self.verticalLayout_4.addWidget(self.pushButton_2)
        self.pushButton_3 = QtWidgets.QPushButton(self.frame_left_buttons)
        self.pushButton_3.setMinimumSize(QtCore.QSize(0, 40))
        self.pushButton_3.setStyleSheet("QPushButton{\n"
                                        "    \n"
                                        "    background-color: rgb(45, 45, 45);\n"
                                        "    color: rgb(255, 255, 255);\n"
                                        "    border: 1px rgb(255, 255, 255) solid;\n"
                                        "}\n"
                                        "\n"
                                        "QPushButton:hover{\n"
                                        "    \n"
                                        "    background-color: rgb(85, 175, 255);\n"
                                        "}")
        self.pushButton_3.setObjectName("pushButton_3")
        self.verticalLayout_4.addWidget(self.pushButton_3)
        self.pushButton = QtWidgets.QPushButton(self.frame_left_buttons)
        self.pushButton.setMinimumSize(QtCore.QSize(0, 40))
        self.pushButton.setStyleSheet("QPushButton{\n"
                                      "    \n"
                                      "    background-color: rgb(45, 45, 45);\n"
                                      "    color: rgb(255, 255, 255);\n"
                                      "    border: 1px rgb(255, 255, 255) solid;\n"
                                      "}\n"
                                      "\n"
                                      "QPushButton:hover{\n"
                                      "    \n"
                                      "    background-color: rgb(85, 175, 255);\n"
                                      "}")
        self.pushButton.setObjectName("pushButton")
        self.verticalLayout_4.addWidget(self.pushButton)
        self.verticalLayout_3.addWidget(self.frame_left_buttons, 0, QtCore.Qt.AlignmentFlag.AlignTop)
        self.horizontalLayout_2.addWidget(self.frame_left_menu)
        self.frame_pages = QtWidgets.QFrame(self.content)
        self.frame_pages.setStyleSheet("")
        self.frame_pages.setFrameShape(QtWidgets.QFrame.Shape.StyledPanel)
        self.frame_pages.setFrameShadow(QtWidgets.QFrame.Shadow.Raised)
        self.frame_pages.setObjectName("frame_pages")
        self.verticalLayout_5 = QtWidgets.QVBoxLayout(self.frame_pages)
        self.verticalLayout_5.setObjectName("verticalLayout_5")
        self.stackedWidget = QtWidgets.QStackedWidget(self.frame_pages)
        self.stackedWidget.setObjectName("stackedWidget")
        self.page = QtWidgets.QWidget()
        self.page.setObjectName("page")
        self.stackedWidget.addWidget(self.page)
        self.page_2 = QtWidgets.QWidget()
        self.page_2.setObjectName("page_2")
        self.stackedWidget.addWidget(self.page_2)
        self.verticalLayout_5.addWidget(self.stackedWidget)
        self.horizontalLayout_2.addWidget(self.frame_pages)
        self.verticalLayout.addWidget(self.content)
        MainWindow.setCentralWidget(self.centralwidget)

        self.retranslateUi(MainWindow)
        QtCore.QMetaObject.connectSlotsByName(MainWindow)

    def retranslateUi(self, MainWindow):
        _translate = QtCore.QCoreApplication.translate
        MainWindow.setWindowTitle(_translate("MainWindow", "MainWindow"))
        self.btn_toggle.setText(_translate("MainWindow", "Toggle"))
        self.pushButton_2.setText(_translate("MainWindow", "PushButton"))
        self.pushButton_3.setText(_translate("MainWindow", "PushButton"))
        self.pushButton.setText(_translate("MainWindow", "PushButton"))

    def toggle_clicked(self, maxWidth, enable):
        if enable:

            # GET WIDTH
            wid = self.frame_left_menu.width()
            maxExtend = maxWidth
            standard = 70

            # Set Max Width
            if wid == standard:
                widthExtend = maxExtend
            else:
                widthExtend = standard

            # animation
            self.animation = QPropertyAnimation(self.frame_left_menu, b"minimumWidth")
            self.animation.setDuration(400)
            self.animation.setStartValue(wid)
            self.animation.endValue(widthExtend)
            self.animation.start()


if __name__ == "__main__":
    import sys

    app = QtWidgets.QApplication(sys.argv)
    MainWindow = QtWidgets.QMainWindow()
    ui = Ui_MainWindow()
    ui.setupUi(MainWindow)
    MainWindow.show()
    sys.exit(app.exec())

within this code, my aim was to just do basic connectivity and event handling for the toggle button (btn_toggle), but the error mentioned in the title keeps popping up, even though (self.frame_left_menu) definitely exists.
i wish to obtain the width of the frame(frame_left_menu) when the toggle button is clicked.
Please enlighten me on what I am doing wrong and/or a workaround to get the same result
The code has been converted from .ui file to .py file via pyuic6 command and I have installed PyQt6 already.

the exact error is :-

Traceback (most recent call last):
  File "D:\Python\Pyhton\PyQT\project\ui_main.py", line 216, in <module>
    ui.setupUi(MainWindow)
  File "D:\Python\Pyhton\PyQT\project\ui_main.py", line 73, in setupUi
    self.btn_toggle.clicked.connect(self.toggle_clicked(140, True))
  File "D:\Python\Pyhton\PyQT\project\ui_main.py", line 192, in toggle_clicked
    wid = self.frame_left_menu.width()
AttributeError: 'Ui_MainWindow' object has no attribute 'frame_left_menu'

SGaist · wrote on 30 Aug 2022, 18:35

Hi and welcome to devnet,

Your connect statement is wrong.

self.btn_toggle.clicked.connect(self.toggle_clicked(140, True))

What happens is that you connect the signal to the value returned by the call to toggle_clicked. Since you are calling it now, the rest of the widgets have not yet been created and thus the error you are getting.

Flare · wrote on 30 Aug 2022, 19:08

won't the code only run after I have clicked the button?
also, considering that this is the case, what should I be doing to avoid this? please brief me

SGaist · wrote on 30 Aug 2022, 19:13

No it won't.

Here is this line rewritten for clarity about the sequence of events:

result = self.toggle_clicked(140, True)
self.btn_toggle.clicked.connect(result)

If you want to pass variables like that to the slot when clicking the button, either use a lambda as the connect target or an intermediate parameter less slot that will call toggle_clicked with the parameters you want.

Flare · 31 Aug 2022, 11:20

alright, i think i understand
but i do not quite understand what you mean by "use a lambda as the connect target"
from what i found online, it seems to be something of this sort

self.btn_toggle.clicked.connect(lambda: self.toggle_clicked(140, True))

and if this is what i am supposed to do, it just in turn gives me this error when i click the toggle button:

Process finished with exit code -1073740791 (0xC0000409)

it just seems to be an error suppression
if i am understanding this completely wrong, please help me out
thanks and regards

jsulm · 31 Aug 2022, 15:57

@Flare said in AttributeError: 'Ui_MainWindow' object has no attribute 'frame_left_menu':

self.btn_toggle.clicked.connect(lambda: self.toggle_clicked(140, True))

Should be

self.btn_toggle.clicked.connect(lambda self: self.toggle_clicked(140, True))

Flare · J jsulm 31 Aug 2022, 11:20

@jsulm
i still get the same error

Process finished with exit code -1073740791 (0xC0000409)

is there perhaps something wrong within my function? i get all other input within the function just fine before reaching the

wid = self.frame_left_menu.width()

line
thanks and regards

SGaist · wrote on 31 Aug 2022, 18:24

What does the debugger tell you when you hit that line ?

Flare · wrote on 3 Sept 2022, 07:26

well i was able to solve it on my own
thanks for the help guys
turns out after passing the connect statement through lambda, a different issue arrised
instead of

self.animation.endValue(widthExtend)

i had to write

self.animation.setEndValue(widthExtend)