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Commit f9aafd4

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Merge pull request #42 from pythonguis/examples-from-articles
Examples from articles
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‎pyqt5/tutorials/basic-widgets/README.md

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# PyQt5 Widgets
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This folder contains the code examples for the PythonGUIs tutorial [PyQt5 Widgets](https://www.pythonguis.com/tutorials/pyqt-basic-widgets/).
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import sys
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from PyQt5.QtWidgets import (
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QApplication,
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QCheckBox,
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QComboBox,
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QDateEdit,
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QDateTimeEdit,
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QDial,
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QDoubleSpinBox,
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QFontComboBox,
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QLabel,
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QLCDNumber,
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QLineEdit,
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QMainWindow,
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QProgressBar,
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QPushButton,
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QRadioButton,
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QSlider,
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QSpinBox,
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QTimeEdit,
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QVBoxLayout,
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QWidget,
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)
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class MainWindow(QMainWindow):
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def __init__(self):
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super().__init__()
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self.setWindowTitle("Widgets App")
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layout = QVBoxLayout()
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widgets = [
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QCheckBox,
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QComboBox,
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QDateEdit,
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QDateTimeEdit,
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QDial,
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QDoubleSpinBox,
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QFontComboBox,
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QLCDNumber,
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QLabel,
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QLineEdit,
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QProgressBar,
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QPushButton,
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QRadioButton,
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QSlider,
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QSpinBox,
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QTimeEdit,
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]
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for w in widgets:
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layout.addWidget(w())
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widget = QWidget()
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widget.setLayout(layout)
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self.setCentralWidget(widget)
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app = QApplication(sys.argv)
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window = MainWindow()
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window.show()
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app.exec()
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import sys
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from PyQt5.QtCore import Qt
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from PyQt5.QtWidgets import (
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QApplication,
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QCheckBox,
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QComboBox,
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QDial,
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QDoubleSpinBox,
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QLabel,
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QLineEdit,
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QListWidget,
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QMainWindow,
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QSlider,
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QSpinBox,
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)
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class MainWindow(QMainWindow):
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def __init__(self):
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super(MainWindow, self).__init__()
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self.setWindowTitle("My App")
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app = QApplication(sys.argv)
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w = MainWindow()
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w.show()
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app.exec()
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import sys
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from PyQt5.QtCore import Qt
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from PyQt5.QtWidgets import QApplication, QLabel, QMainWindow
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class MainWindow(QMainWindow):
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def __init__(self):
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super(MainWindow, self).__init__()
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self.setWindowTitle("My App")
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widget = QLabel("Hello")
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font = widget.font()
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font.setPointSize(30)
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widget.setFont(font)
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widget.setAlignment(Qt.AlignHCenter | Qt.AlignVCenter)
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self.setCentralWidget(widget)
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app = QApplication(sys.argv)
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w = MainWindow()
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w.show()
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app.exec()
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import sys
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from PyQt5.QtCore import Qt
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from PyQt5.QtGui import QPixmap
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from PyQt5.QtWidgets import QApplication, QLabel, QMainWindow
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class MainWindow(QMainWindow):
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def __init__(self):
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super(MainWindow, self).__init__()
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self.setWindowTitle("My App")
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widget = QLabel()
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widget.setPixmap(QPixmap("otje.jpg"))
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widget.setScaledContents(True)
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widget.setAlignment(Qt.AlignHCenter | Qt.AlignVCenter)
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self.setCentralWidget(widget)
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app = QApplication(sys.argv)
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w = MainWindow()
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w.show()
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app.exec()
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import sys
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from PyQt5.QtCore import Qt
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from PyQt5.QtWidgets import QApplication, QCheckBox, QMainWindow
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class MainWindow(QMainWindow):
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def __init__(self):
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super(MainWindow, self).__init__()
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self.setWindowTitle("My App")
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widget = QCheckBox()
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widget.setCheckState(Qt.Checked)
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widget.stateChanged.connect(self.show_state)
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self.setCentralWidget(widget)
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def show_state(self, s):
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print(s == Qt.Checked)
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print(s)
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app = QApplication(sys.argv)
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w = MainWindow()
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w.show()
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app.exec()
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import sys
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from PyQt5.QtWidgets import QApplication, QComboBox, QMainWindow
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class MainWindow(QMainWindow):
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def __init__(self):
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super(MainWindow, self).__init__()
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self.setWindowTitle("My App")
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widget = QComboBox()
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widget.addItems(["One", "Two", "Three"])
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widget.currentIndexChanged.connect(self.index_changed)
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widget.currentTextChanged.connect(self.text_changed)
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self.setCentralWidget(widget)
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def index_changed(self, i):
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print(i)
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def text_changed(self, s):
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print(s)
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app = QApplication(sys.argv)
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w = MainWindow()
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w.show()
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app.exec()
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import sys
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from PyQt5.QtWidgets import QApplication, QListWidget, QMainWindow
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class MainWindow(QMainWindow):
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def __init__(self):
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super(MainWindow, self).__init__()
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self.setWindowTitle("My App")
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widget = QListWidget()
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widget.addItems(["One", "Two", "Three"])
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widget.currentItemChanged.connect(self.index_changed)
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widget.currentTextChanged.connect(self.text_changed)
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self.setCentralWidget(widget)
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def index_changed(self, i):
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print(i.text())
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def text_changed(self, s):
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print(s)
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app = QApplication(sys.argv)
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w = MainWindow()
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w.show()
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app.exec()
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import sys
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from PyQt5.QtWidgets import QApplication, QLineEdit, QMainWindow
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class MainWindow(QMainWindow):
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def __init__(self):
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super(MainWindow, self).__init__()
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self.setWindowTitle("My App")
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widget = QLineEdit()
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widget.setMaxLength(10)
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widget.setPlaceholderText("Enter your text")
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# widget.setReadOnly(True) # uncomment this to make readonly
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widget.returnPressed.connect(self.return_pressed)
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widget.selectionChanged.connect(self.selection_changed)
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widget.textChanged.connect(self.text_changed)
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widget.textEdited.connect(self.text_edited)
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self.setCentralWidget(widget)
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def return_pressed(self):
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print("Return pressed!")
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self.centralWidget().setText("BOOM!")
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def selection_changed(self):
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print("Selection changed")
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print(self.centralWidget().selectedText())
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def text_changed(self, s):
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print("Text changed...")
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print(s)
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def text_edited(self, s):
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print("Text edited...")
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print(s)
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app = QApplication(sys.argv)
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w = MainWindow()
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w.show()
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app.exec()
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import sys
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from PyQt5.QtWidgets import QApplication, QMainWindow, QSpinBox
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class MainWindow(QMainWindow):
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def __init__(self):
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super().__init__()
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self.setWindowTitle("My App")
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widget = QSpinBox()
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# Or: widget = QDoubleSpinBox()
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widget.setMinimum(-9)
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widget.setMaximum(3)
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# Or: widget.setRange(-9, 3)
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widget.setPrefix("$")
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widget.setSuffix("c")
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widget.setSingleStep(3) # Or e.g. 3.0 for QDoubleSpinBox
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widget.valueChanged.connect(self.value_changed)
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widget.textChanged.connect(self.value_changed_str)
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self.setCentralWidget(widget)
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def value_changed(self, i):
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print(i)
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def value_changed_str(self, s):
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print(s)
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app = QApplication(sys.argv)
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w = MainWindow()
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w.show()
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app.exec()

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