PyQt5 QGridLayout аварийно завершает работу при удалении виджета

Question

У меня есть небольшое приложение, которое берет имена файлов с сервера и показывает их пользователю. Однако я столкнулся с проблемой, из-за которой мой проект полностью вылетел. Вот код, он не работает где-то в функции newData, я пробовал несколько способов очистки макета, но ни один из них не работал.

from PyQt5 import QtCore
from PyQt5.uic import loadUi
from PyQt5.QtGui import QPixmap
from PyQt5.QtWidgets import QApplication, QPushButton, QMainWindow, QGridLayout, QLabel, QVBoxLayout


class MainMenu(QMainWindow):
    """The main menu class"""

    def __init__(self):
        QMainWindow.__init__(self)
        self.gridLayout = QGridLayout(self)
        self.ui = loadUi("UI/MainMenuUI.ui", self)
        self.NameLabel.setText("NAME : NAME")
        self.setAutoFillBackground(True)
        self.RefreshButton.clicked.connect(self.RefreshFiles)

    def RefreshFiles(self):
        self.newData("FILE|FILE|fIlE|")

    def newData(self, data):
        print("New data called")
        if data == '':
            if self.gridLayout.count() > 1:
                w = self.gridLayout.itemAt(0).widget()
                self.gridLayout.removeWidget(w)
                w.hide()
        else:
            print("else")
            if self.gridLayout.count() > 1:
                w = self.gridLayout.itemAt(0)
                self.gridLayout.removeWidget(w)
            self.DisplayFiles(data)

    def DisplayFiles(self, data):
        print("Displaying files")
        print(data)
        data = data.split("|")[:len(data.split("|")) - 1]
        buttons = {}
        j, index, prev = 0, 0, 0
        for i in range(0, len(data)):
            if i % 3 == 0:
                j += 1
                index = 0
            index += 1
            img = "unknown.png"
            filename = str(data[prev])
            actions = {"edit": partial(print, filename),
                       "delete": partial(print, filename),
                       "download": partial(print, filename)
                       }

            def InitiateFileInterationButtons(name, actions):
                """Initiation of file interaction menu (actions is an dictionary)"""
                layout = QVBoxLayout()
                pxmp = QPixmap("unknown.png")
                lbl = QLabel()
                textlbl = QLabel(name)
                lbl.setPixmap(pxmp)
                lbl.setAlignment(QtCore.Qt.AlignHCenter | QtCore.Qt.AlignVCenter)
                layout.addWidget(textlbl)
                layout.addWidget(lbl)
                sublayout = QHBoxLayout()
                deletebutton = QPushButton("delete")
                deletebutton.clicked.connect(actions["delete"])
                editbutton = QPushButton("edit")
                editbutton.clicked.connect(actions["edit"])
                downloadbutton = QPushButton("download")
                downloadbutton.clicked.connect(actions["download"])
                sublayout.addWidget(deletebutton)
                sublayout.addWidget(editbutton)
                sublayout.addWidget(downloadbutton)
                layout.addLayout(sublayout)
                return layout

            buttons[(index, j)] = InitiateFileInterationButtons(
                filename, actions)
            prev += 1
            self.gridLayout.addLayout(buttons[(index, j)], index, j)
            print("initiated {}".format(filename))

    def Show(self):
        self.ui.NameLabel.setText("NAME : NAME")
        self.RefreshFiles()
        self.ui.show()

app = QApplication([])
mainmenu = MainMenu()
mainmenu.Show()
app.exec_()

А вот файл mainmenui.ui

<ui version="4.0">
 <class>UploadWindow</class>
 <widget class="QMainWindow" name="UploadWindow">
  <property name="geometry">
   <rect>
    <x>0</x>
    <y>0</y>
    <width>1304</width>
    <height>684</height>
   </rect>
  </property>
  <property name="windowTitle">
   <string>MainWindow</string>
  </property>
  <widget class="QWidget" name="centralwidget">
   <widget class="QLabel" name="NameLabel">
    <property name="geometry">
     <rect>
      <x>0</x>
      <y>0</y>
      <width>161</width>
      <height>61</height>
     </rect>
    </property>
    <property name="font">
     <font>
      <family>Bungee Inline</family>
      <pointsize>9</pointsize>
     </font>
    </property>
    <property name="text">
     <string>NAME:SAMPLETEXT</string>
    </property>
    <property name="textFormat">
     <enum>Qt::AutoText</enum>
    </property>
   </widget>
   <widget class="QPushButton" name="RefreshButton">
    <property name="geometry">
     <rect>
      <x>280</x>
      <y>0</y>
      <width>141</width>
      <height>71</height>
     </rect>
    </property>
    <property name="font">
     <font>
      <family>Bungee Inline</family>
     </font>
    </property>
    <property name="text">
     <string>Refresh fie list</string>
    </property>
   </widget>
   <widget class="QWidget" name="gridLayoutWidget">
    <property name="geometry">
     <rect>
      <x>0</x>
      <y>70</y>
      <width>1301</width>
      <height>551</height>
     </rect>
    </property>
    <layout class="QGridLayout" name="gridLayout"/>
   </widget>
  </widget>
  <widget class="QMenuBar" name="menubar">
   <property name="geometry">
    <rect>
     <x>0</x>
     <y>0</y>
     <width>1304</width>
     <height>26</height>
    </rect>
   </property>
  </widget>
  <widget class="QStatusBar" name="statusbar"/>
 </widget>
 <resources/>
 <connections/>
</ui>