PyQT5 - align left

[Axel_Erfurt]

You want it horizontal

import PyQt5.QtWidgets as QtWidgets
from PyQt5.QtGui import QFontMetrics
from PyQt5.QtCore import Qt
 
 
class MyWindow(QtWidgets.QWidget):
    def __init__(self):
        super().__init__()
        self.setGeometry(100, 100, 800, 50)
        self.lp_label = QtWidgets.QLabel("Low-pass (Hz): ", self)
        self.lp_label.setAlignment(Qt.AlignLeft | Qt.AlignVCenter)
        self.lp_label.setFixedWidth(self.get_metrics(self.lp_label))
 
        self.lp_edit = QtWidgets.QLineEdit("150", self)
        self.lp_edit.setAlignment(Qt.AlignLeft)
        self.lp_edit.setFixedWidth(self.get_metrics(self.lp_edit) + 10)
 
        self.hp_label = QtWidgets.QLabel("High-pass (Hz): ", self)
        self.hp_label.setAlignment(Qt.AlignLeft | Qt.AlignVCenter)
        self.hp_label.setFixedWidth(self.get_metrics(self.hp_label))
 
        self.hp_edit = QtWidgets.QLineEdit("1000", self)
        self.hp_edit.setAlignment(Qt.AlignLeft)
        self.hp_edit.setFixedWidth(self.get_metrics(self.hp_edit) + 10)
 
        self.hanning_sel = QtWidgets.QComboBox(self)
        self.hanning_sel.addItems(["Hanning", "Hamming", "Flat", "None"])
        self.hanning_sel.setFixedWidth(100)
        
        #space
        space = QtWidgets.QWidget()
 
        buttonbox3 = QtWidgets.QHBoxLayout(self)
        buttonbox3.addWidget(self.lp_label)
        buttonbox3.addWidget(self.lp_edit)
        buttonbox3.addWidget(self.hp_label)
        buttonbox3.addWidget(self.hp_edit)
        buttonbox3.addWidget(self.hanning_sel)
        buttonbox3.addWidget(space)
        
    def get_metrics(self, label):
        return label.fontMetrics().boundingRect(label.text()).width()
        
 
if __name__ == '__main__':
    import sys
    app = QtWidgets.QApplication(sys.argv)
    window = MyWindow()
    window.show()
    app.exec()