Unknown Qt widget error when importing a .ui file in Python3 using PyQt5?
Question:
When importing an .ui file from QtDesigner into a Python3 file, I am encountering the error message PyQt5.uic.exceptions.NoSuchWidgetError: Unknown Qt widget: KPIM.AddresseeLineEdit. Although my code has worked in previous projects, it is not functioning properly in my current project.
What is KPIM.AddresseeLineEdit and is it a PyQt5 widget?
import sqlite3
from PyQt5.uic import *
from PyQt5.QtWidgets import *
from os import path
import sys
FORM_CLASS,_ = loadUiType(path.join(path.dirname(__file__), "login.ui"))
class Main(QMainWindow, FORM_CLASS):
def __init__(self, parent=None):
super(Main, self).__init__(parent)
self.setupUi(self)
def main():
app = QApplication(sys.argv)
window = Main()
window.show()
app.exec_()
if __name__ == '__main__':
main()
Output:
Traceback (most recent call last):
File "/usr/lib/python3.9/idlelib/run.py", line 559, in runcode
exec(code, self.locals)
File "/home/lixt/Desktop/Zamaio/ui/remade/register/zamaio.py", line 8, in <module>
FORM_CLASS,_ = loadUiType(path.join(path.dirname(__file__), "login.ui"))
File "/usr/local/lib/python3.9/dist-packages/PyQt5/uic/__init__.py", line 200, in loadUiType
winfo = compiler.UICompiler().compileUi(uifile, code_string, from_imports,
File "/usr/local/lib/python3.9/dist-packages/PyQt5/uic/Compiler/compiler.py", line 111, in compileUi
w = self.parse(input_stream, resource_suffix)
File "/usr/local/lib/python3.9/dist-packages/PyQt5/uic/uiparser.py", line 1037, in parse
actor(elem)
File "/usr/local/lib/python3.9/dist-packages/PyQt5/uic/uiparser.py", line 828, in createUserInterface
self.traverseWidgetTree(elem)
File "/usr/local/lib/python3.9/dist-packages/PyQt5/uic/uiparser.py", line 806, in traverseWidgetTree
handler(self, child)
File "/usr/local/lib/python3.9/dist-packages/PyQt5/uic/uiparser.py", line 264, in createWidget
self.stack.push(self.setupObject(widget_class, parent, elem))
File "/usr/local/lib/python3.9/dist-packages/PyQt5/uic/uiparser.py", line 228, in setupObject
obj = self.factory.createQObject(clsname, name, args, is_attribute)
File "/usr/local/lib/python3.9/dist-packages/PyQt5/uic/objcreator.py", line 116, in createQObject
raise NoSuchWidgetError(classname)
PyQt5.uic.exceptions.NoSuchWidgetError: Unknown Qt widget: KPIM.AddresseeLineEdit
My ui file
<?xml version="1.0" encoding="UTF-8"?>
<ui version="4.0">
<class>Form</class>
<widget class="QWidget" name="Form">
<property name="geometry">
<rect>
<x>0</x>
<y>0</y>
<width>524</width>
<height>555</height>
</rect>
</property>
<property name="windowTitle">
<string>Form</string>
</property>
<property name="styleSheet">
<string notr="true">background-color: rgb(29, 68, 9);</string>
</property>
<widget class="QLabel" name="title">
<property name="geometry">
<rect>
<x>0</x>
<y>10</y>
<width>521</width>
<height>41</height>
</rect>
</property>
<property name="statusTip">
<string>Zamaio is a new social platform!</string>
</property>
<property name="whatsThis">
<string>Zamaio is a new social platform!</string>
</property>
<property name="styleSheet">
<string notr="true">color: rgb(25, 255, 0);</string>
</property>
<property name="text">
<string><html><head/><body><p align="center"><span style=" font-size:26pt; font-weight:600;">Zamaio</span></p></body></html></string>
</property>
</widget>
<widget class="QLabel" name="username_text">
<property name="geometry">
<rect>
<x>20</x>
<y>120</y>
<width>121</width>
<height>31</height>
</rect>
</property>
<property name="font">
<font>
<family>Sans Serif</family>
<weight>50</weight>
<italic>false</italic>
<bold>false</bold>
</font>
</property>
<property name="statusTip">
<string>Zamaio is a new social platform!</string>
</property>
<property name="whatsThis">
<string>Zamaio is a new social platform!</string>
</property>
<property name="styleSheet">
<string notr="true">color: rgb(181, 195, 130);</string>
</property>
<property name="text">
<string><html><head/><body><p align="center"><span style=" font-size:11pt; font-weight:600;">Username:</span></p></body></html></string>
</property>
</widget>
<widget class="KPIM::AddresseeLineEdit" name="username">
<property name="geometry">
<rect>
<x>130</x>
<y>120</y>
<width>221</width>
<height>28</height>
</rect>
</property>
<property name="styleSheet">
<string notr="true">background-color: rgb(44, 97, 4);
color: rgb(240, 255, 233);
border-width: 1px;
border-style: solid;
border-color: black black black black;</string>
</property>
<property name="maxLength">
<number>29</number>
</property>
</widget>
<widget class="QLabel" name="password_text">
<property name="geometry">
<rect>
<x>20</x>
<y>170</y>
<width>121</width>
<height>31</height>
</rect>
</property>
<property name="font">
<font>
<family>Sans Serif</family>
<weight>50</weight>
<italic>false</italic>
<bold>false</bold>
</font>
</property>
<property name="statusTip">
<string>Zamaio is a new social platform!</string>
</property>
<property name="whatsThis">
<string>Zamaio is a new social platform!</string>
</property>
<property name="styleSheet">
<string notr="true">color: rgb(181, 195, 130);</string>
</property>
<property name="text">
<string><html><head/><body><p align="center"><span style=" font-size:11pt; font-weight:600;">Password:</span></p></body></html></string>
</property>
</widget>
<widget class="KPIM::AddresseeLineEdit" name="password">
<property name="geometry">
<rect>
<x>130</x>
<y>170</y>
<width>221</width>
<height>28</height>
</rect>
</property>
<property name="styleSheet">
<string notr="true">background-color: rgb(44, 97, 4);
color: rgb(240, 255, 233);
border-width: 1px;
border-style: solid;
border-color: black black black black;
password::hover {
border-color: black black white white;
}</string>
</property>
<property name="maxLength">
<number>32</number>
</property>
<property name="readOnly">
<bool>false</bool>
</property>
<property name="urlDropsEnabled">
<bool>false</bool>
</property>
<property name="trapEnterKeyEvent" stdset="0">
<bool>false</bool>
</property>
<property name="squeezedTextEnabled">
<bool>false</bool>
</property>
<property name="passwordMode">
<bool>true</bool>
</property>
</widget>
<widget class="QLabel" name="Age_text">
<property name="geometry">
<rect>
<x>20</x>
<y>370</y>
<width>121</width>
<height>41</height>
</rect>
</property>
<property name="font">
<font>
<family>Sans Serif</family>
<weight>50</weight>
<italic>false</italic>
<bold>false</bold>
</font>
</property>
<property name="statusTip">
<string>Zamaio is a new social platform!</string>
</property>
<property name="whatsThis">
<string>Zamaio is a new social platform!</string>
</property>
<property name="styleSheet">
<string notr="true">color: rgb(181, 195, 130);</string>
</property>
<property name="text">
<string><html><head/><body><p align="center"><span style=" font-size:11pt; font-weight:600;">Age:</span></p></body></html></string>
</property>
</widget>
<widget class="QLabel" name="confirm_password_texr">
<property name="geometry">
<rect>
<x>10</x>
<y>220</y>
<width>161</width>
<height>31</height>
</rect>
</property>
<property name="font">
<font>
<family>Sans Serif</family>
<weight>50</weight>
<italic>false</italic>
<bold>false</bold>
</font>
</property>
<property name="statusTip">
<string>Zamaio is a new social platform!</string>
</property>
<property name="whatsThis">
<string>Zamaio is a new social platform!</string>
</property>
<property name="styleSheet">
<string notr="true">color: rgb(181, 195, 130);</string>
</property>
<property name="text">
<string><html><head/><body><p align="center"><span style=" font-size:11pt; font-weight:600;">Confirm Password:</span></p></body></html></string>
</property>
</widget>
<widget class="KPIM::AddresseeLineEdit" name="confirm_password">
<property name="geometry">
<rect>
<x>180</x>
<y>220</y>
<width>171</width>
<height>28</height>
</rect>
</property>
<property name="styleSheet">
<string notr="true">background-color: rgb(44, 97, 4);
color: rgb(240, 255, 233);
border-width: 1px;
border-style: solid;
border-color: black black black black;
password::hover {
border-color: black black white white;
}</string>
</property>
<property name="maxLength">
<number>32</number>
</property>
<property name="readOnly">
<bool>false</bool>
</property>
<property name="urlDropsEnabled">
<bool>false</bool>
</property>
<property name="trapEnterKeyEvent" stdset="0">
<bool>false</bool>
</property>
<property name="squeezedTextEnabled">
<bool>false</bool>
</property>
<property name="passwordMode">
<bool>true</bool>
</property>
</widget>
<widget class="QSlider" name="age_slider">
<property name="geometry">
<rect>
<x>110</x>
<y>380</y>
<width>261</width>
<height>17</height>
</rect>
</property>
<property name="orientation">
<enum>Qt::Horizontal</enum>
</property>
</widget>
<widget class="QLabel" name="Age_counter">
<property name="geometry">
<rect>
<x>370</x>
<y>370</y>
<width>151</width>
<height>41</height>
</rect>
</property>
<property name="font">
<font>
<family>Sans Serif</family>
<weight>50</weight>
<italic>false</italic>
<bold>false</bold>
</font>
</property>
<property name="statusTip">
<string>Zamaio is a new social platform!</string>
</property>
<property name="whatsThis">
<string>Zamaio is a new social platform!</string>
</property>
<property name="styleSheet">
<string notr="true">color: rgb(181, 195, 130);</string>
</property>
<property name="text">
<string><html><head/><body><p align="center"/></body></html></string>
</property>
</widget>
<widget class="QPushButton" name="pushButton">
<property name="geometry">
<rect>
<x>380</x>
<y>470</y>
<width>90</width>
<height>28</height>
</rect>
</property>
<property name="styleSheet">
<string notr="true">QPushButton {
color: #FFFFFF;
background-color: rgb(17, 176, 27);
border-style: outset;
padding: 2px;
font: bold 20px;
border-width: 2px;
border-radius: 4px;
border-color: rgb(19, 197, 0);
}
QPushButton:hover {
background-color: rgb(47, 105, 37);
border-color: rgb(33, 163, 30);
}
QPushButton::clicked
{
background-color : red;
}</string>
</property>
<property name="text">
<string>Create</string>
</property>
</widget>
<widget class="QPushButton" name="ViewPass1">
<property name="geometry">
<rect>
<x>360</x>
<y>170</y>
<width>31</width>
<height>28</height>
</rect>
</property>
<property name="text">
<string/>
</property>
</widget>
<widget class="QPushButton" name="ViewPass1_2">
<property name="geometry">
<rect>
<x>360</x>
<y>220</y>
<width>31</width>
<height>28</height>
</rect>
</property>
<property name="text">
<string/>
</property>
</widget>
</widget>
<customwidgets>
<customwidget>
<class>KPIM::AddresseeLineEdit</class>
<extends>QLineEdit</extends>
<header>LibkdepimAkonadi/AddresseeLineEdit</header>
</customwidget>
</customwidgets>
<resources/>
<connections/>
</ui>
Is there any kind of bug?
Solution
By replace KPIM::AddresseeLineEdit by QTextEdit in the .ui file solves the problem
Answers:
It appears that the issue was caused by using unsupported widgets in PyQt5. I was able to fix it by replacing KPIM::AddresseeLineEdit with QTextEdit in the .ui file. Thank you to @ekhumoro for pointing me in the right direction.
When importing an .ui file from QtDesigner into a Python3 file, I am encountering the error message PyQt5.uic.exceptions.NoSuchWidgetError: Unknown Qt widget: KPIM.AddresseeLineEdit. Although my code has worked in previous projects, it is not functioning properly in my current project.
What is KPIM.AddresseeLineEdit and is it a PyQt5 widget?
import sqlite3
from PyQt5.uic import *
from PyQt5.QtWidgets import *
from os import path
import sys
FORM_CLASS,_ = loadUiType(path.join(path.dirname(__file__), "login.ui"))
class Main(QMainWindow, FORM_CLASS):
def __init__(self, parent=None):
super(Main, self).__init__(parent)
self.setupUi(self)
def main():
app = QApplication(sys.argv)
window = Main()
window.show()
app.exec_()
if __name__ == '__main__':
main()
Output:
Traceback (most recent call last):
File "/usr/lib/python3.9/idlelib/run.py", line 559, in runcode
exec(code, self.locals)
File "/home/lixt/Desktop/Zamaio/ui/remade/register/zamaio.py", line 8, in <module>
FORM_CLASS,_ = loadUiType(path.join(path.dirname(__file__), "login.ui"))
File "/usr/local/lib/python3.9/dist-packages/PyQt5/uic/__init__.py", line 200, in loadUiType
winfo = compiler.UICompiler().compileUi(uifile, code_string, from_imports,
File "/usr/local/lib/python3.9/dist-packages/PyQt5/uic/Compiler/compiler.py", line 111, in compileUi
w = self.parse(input_stream, resource_suffix)
File "/usr/local/lib/python3.9/dist-packages/PyQt5/uic/uiparser.py", line 1037, in parse
actor(elem)
File "/usr/local/lib/python3.9/dist-packages/PyQt5/uic/uiparser.py", line 828, in createUserInterface
self.traverseWidgetTree(elem)
File "/usr/local/lib/python3.9/dist-packages/PyQt5/uic/uiparser.py", line 806, in traverseWidgetTree
handler(self, child)
File "/usr/local/lib/python3.9/dist-packages/PyQt5/uic/uiparser.py", line 264, in createWidget
self.stack.push(self.setupObject(widget_class, parent, elem))
File "/usr/local/lib/python3.9/dist-packages/PyQt5/uic/uiparser.py", line 228, in setupObject
obj = self.factory.createQObject(clsname, name, args, is_attribute)
File "/usr/local/lib/python3.9/dist-packages/PyQt5/uic/objcreator.py", line 116, in createQObject
raise NoSuchWidgetError(classname)
PyQt5.uic.exceptions.NoSuchWidgetError: Unknown Qt widget: KPIM.AddresseeLineEdit
My ui file
<?xml version="1.0" encoding="UTF-8"?>
<ui version="4.0">
<class>Form</class>
<widget class="QWidget" name="Form">
<property name="geometry">
<rect>
<x>0</x>
<y>0</y>
<width>524</width>
<height>555</height>
</rect>
</property>
<property name="windowTitle">
<string>Form</string>
</property>
<property name="styleSheet">
<string notr="true">background-color: rgb(29, 68, 9);</string>
</property>
<widget class="QLabel" name="title">
<property name="geometry">
<rect>
<x>0</x>
<y>10</y>
<width>521</width>
<height>41</height>
</rect>
</property>
<property name="statusTip">
<string>Zamaio is a new social platform!</string>
</property>
<property name="whatsThis">
<string>Zamaio is a new social platform!</string>
</property>
<property name="styleSheet">
<string notr="true">color: rgb(25, 255, 0);</string>
</property>
<property name="text">
<string><html><head/><body><p align="center"><span style=" font-size:26pt; font-weight:600;">Zamaio</span></p></body></html></string>
</property>
</widget>
<widget class="QLabel" name="username_text">
<property name="geometry">
<rect>
<x>20</x>
<y>120</y>
<width>121</width>
<height>31</height>
</rect>
</property>
<property name="font">
<font>
<family>Sans Serif</family>
<weight>50</weight>
<italic>false</italic>
<bold>false</bold>
</font>
</property>
<property name="statusTip">
<string>Zamaio is a new social platform!</string>
</property>
<property name="whatsThis">
<string>Zamaio is a new social platform!</string>
</property>
<property name="styleSheet">
<string notr="true">color: rgb(181, 195, 130);</string>
</property>
<property name="text">
<string><html><head/><body><p align="center"><span style=" font-size:11pt; font-weight:600;">Username:</span></p></body></html></string>
</property>
</widget>
<widget class="KPIM::AddresseeLineEdit" name="username">
<property name="geometry">
<rect>
<x>130</x>
<y>120</y>
<width>221</width>
<height>28</height>
</rect>
</property>
<property name="styleSheet">
<string notr="true">background-color: rgb(44, 97, 4);
color: rgb(240, 255, 233);
border-width: 1px;
border-style: solid;
border-color: black black black black;</string>
</property>
<property name="maxLength">
<number>29</number>
</property>
</widget>
<widget class="QLabel" name="password_text">
<property name="geometry">
<rect>
<x>20</x>
<y>170</y>
<width>121</width>
<height>31</height>
</rect>
</property>
<property name="font">
<font>
<family>Sans Serif</family>
<weight>50</weight>
<italic>false</italic>
<bold>false</bold>
</font>
</property>
<property name="statusTip">
<string>Zamaio is a new social platform!</string>
</property>
<property name="whatsThis">
<string>Zamaio is a new social platform!</string>
</property>
<property name="styleSheet">
<string notr="true">color: rgb(181, 195, 130);</string>
</property>
<property name="text">
<string><html><head/><body><p align="center"><span style=" font-size:11pt; font-weight:600;">Password:</span></p></body></html></string>
</property>
</widget>
<widget class="KPIM::AddresseeLineEdit" name="password">
<property name="geometry">
<rect>
<x>130</x>
<y>170</y>
<width>221</width>
<height>28</height>
</rect>
</property>
<property name="styleSheet">
<string notr="true">background-color: rgb(44, 97, 4);
color: rgb(240, 255, 233);
border-width: 1px;
border-style: solid;
border-color: black black black black;
password::hover {
border-color: black black white white;
}</string>
</property>
<property name="maxLength">
<number>32</number>
</property>
<property name="readOnly">
<bool>false</bool>
</property>
<property name="urlDropsEnabled">
<bool>false</bool>
</property>
<property name="trapEnterKeyEvent" stdset="0">
<bool>false</bool>
</property>
<property name="squeezedTextEnabled">
<bool>false</bool>
</property>
<property name="passwordMode">
<bool>true</bool>
</property>
</widget>
<widget class="QLabel" name="Age_text">
<property name="geometry">
<rect>
<x>20</x>
<y>370</y>
<width>121</width>
<height>41</height>
</rect>
</property>
<property name="font">
<font>
<family>Sans Serif</family>
<weight>50</weight>
<italic>false</italic>
<bold>false</bold>
</font>
</property>
<property name="statusTip">
<string>Zamaio is a new social platform!</string>
</property>
<property name="whatsThis">
<string>Zamaio is a new social platform!</string>
</property>
<property name="styleSheet">
<string notr="true">color: rgb(181, 195, 130);</string>
</property>
<property name="text">
<string><html><head/><body><p align="center"><span style=" font-size:11pt; font-weight:600;">Age:</span></p></body></html></string>
</property>
</widget>
<widget class="QLabel" name="confirm_password_texr">
<property name="geometry">
<rect>
<x>10</x>
<y>220</y>
<width>161</width>
<height>31</height>
</rect>
</property>
<property name="font">
<font>
<family>Sans Serif</family>
<weight>50</weight>
<italic>false</italic>
<bold>false</bold>
</font>
</property>
<property name="statusTip">
<string>Zamaio is a new social platform!</string>
</property>
<property name="whatsThis">
<string>Zamaio is a new social platform!</string>
</property>
<property name="styleSheet">
<string notr="true">color: rgb(181, 195, 130);</string>
</property>
<property name="text">
<string><html><head/><body><p align="center"><span style=" font-size:11pt; font-weight:600;">Confirm Password:</span></p></body></html></string>
</property>
</widget>
<widget class="KPIM::AddresseeLineEdit" name="confirm_password">
<property name="geometry">
<rect>
<x>180</x>
<y>220</y>
<width>171</width>
<height>28</height>
</rect>
</property>
<property name="styleSheet">
<string notr="true">background-color: rgb(44, 97, 4);
color: rgb(240, 255, 233);
border-width: 1px;
border-style: solid;
border-color: black black black black;
password::hover {
border-color: black black white white;
}</string>
</property>
<property name="maxLength">
<number>32</number>
</property>
<property name="readOnly">
<bool>false</bool>
</property>
<property name="urlDropsEnabled">
<bool>false</bool>
</property>
<property name="trapEnterKeyEvent" stdset="0">
<bool>false</bool>
</property>
<property name="squeezedTextEnabled">
<bool>false</bool>
</property>
<property name="passwordMode">
<bool>true</bool>
</property>
</widget>
<widget class="QSlider" name="age_slider">
<property name="geometry">
<rect>
<x>110</x>
<y>380</y>
<width>261</width>
<height>17</height>
</rect>
</property>
<property name="orientation">
<enum>Qt::Horizontal</enum>
</property>
</widget>
<widget class="QLabel" name="Age_counter">
<property name="geometry">
<rect>
<x>370</x>
<y>370</y>
<width>151</width>
<height>41</height>
</rect>
</property>
<property name="font">
<font>
<family>Sans Serif</family>
<weight>50</weight>
<italic>false</italic>
<bold>false</bold>
</font>
</property>
<property name="statusTip">
<string>Zamaio is a new social platform!</string>
</property>
<property name="whatsThis">
<string>Zamaio is a new social platform!</string>
</property>
<property name="styleSheet">
<string notr="true">color: rgb(181, 195, 130);</string>
</property>
<property name="text">
<string><html><head/><body><p align="center"/></body></html></string>
</property>
</widget>
<widget class="QPushButton" name="pushButton">
<property name="geometry">
<rect>
<x>380</x>
<y>470</y>
<width>90</width>
<height>28</height>
</rect>
</property>
<property name="styleSheet">
<string notr="true">QPushButton {
color: #FFFFFF;
background-color: rgb(17, 176, 27);
border-style: outset;
padding: 2px;
font: bold 20px;
border-width: 2px;
border-radius: 4px;
border-color: rgb(19, 197, 0);
}
QPushButton:hover {
background-color: rgb(47, 105, 37);
border-color: rgb(33, 163, 30);
}
QPushButton::clicked
{
background-color : red;
}</string>
</property>
<property name="text">
<string>Create</string>
</property>
</widget>
<widget class="QPushButton" name="ViewPass1">
<property name="geometry">
<rect>
<x>360</x>
<y>170</y>
<width>31</width>
<height>28</height>
</rect>
</property>
<property name="text">
<string/>
</property>
</widget>
<widget class="QPushButton" name="ViewPass1_2">
<property name="geometry">
<rect>
<x>360</x>
<y>220</y>
<width>31</width>
<height>28</height>
</rect>
</property>
<property name="text">
<string/>
</property>
</widget>
</widget>
<customwidgets>
<customwidget>
<class>KPIM::AddresseeLineEdit</class>
<extends>QLineEdit</extends>
<header>LibkdepimAkonadi/AddresseeLineEdit</header>
</customwidget>
</customwidgets>
<resources/>
<connections/>
</ui>
Is there any kind of bug?
Solution
By replace KPIM::AddresseeLineEdit by QTextEdit in the .ui file solves the problem
It appears that the issue was caused by using unsupported widgets in PyQt5. I was able to fix it by replacing KPIM::AddresseeLineEdit with QTextEdit in the .ui file. Thank you to @ekhumoro for pointing me in the right direction.