Function that generates a stylesheet for styling QLineEdit.

style_QLineEdit.py

import sys
from qtpy.QtWidgets import (
    QApplication,
    QMainWindow,
    QLineEdit,
    QFrame,
    QGridLayout,
)


def style_QLineEdit(
    border_width: str = "1px",
    border_radius: str = "4px",
    horizontal_padding: str = "4px",
    vertical_padding: str = "2px",
    border_color: str = "#b0b0b0",
    background_color: str = "#fdfdfd",
    color: str = "#404040",
    placeholder_color: str = "#808080",
    selection_background_color: str = "#404040",
    selection_color: str = "#fdfdfd",
    hover_border_color: str = "#404040",
    disabled_border_color: str = "#b0b0b0",
    disabled_background_color: str = "#e0e0e0",
    disabled_color: str = "#808080",
    password_character: str = chr(9679),
    password_mask_delay: int = 0,
):

    qss = f"""
        QLineEdit {{
            border-width: {border_width};
            border-style: solid;
            border-color: {border_color};
            border-radius: {border_radius};
            background-color: {background_color};
            color: {color};
            padding: {vertical_padding} {horizontal_padding};
            placeholder-text-color: {placeholder_color};
            selection-background-color: {selection_background_color};
            selection-color: {selection_color};
            lineedit-password-character: {ord(password_character)};
            lineedit-password-mask-delay: {password_mask_delay};
        }}
        QLineEdit::hover {{
            border-color: {hover_border_color};
        }}
        QLineEdit::disabled {{
            border-color: {disabled_border_color};
            background-color: {disabled_background_color};
            color: {disabled_color};
        }}
        """
    return qss


class Frame(QFrame):
    def __init__(self, parent=None):
        super().__init__(parent)
        layout = QGridLayout()
        layout.setSizeConstraint(QGridLayout.SizeConstraint.SetFixedSize)
        w = QLineEdit()
        w.setPlaceholderText("Placeholder")
        layout.addWidget(w, 0, 0)
        w = QLineEdit()
        w.setPlaceholderText("Placeholder")
        w.setDisabled(True)
        layout.addWidget(w, 0, 1)
        w = QLineEdit()
        w.setEchoMode(QLineEdit.EchoMode.Password)
        w.setPlaceholderText("Password")
        layout.addWidget(w, 1, 0)
        self.setLayout(layout)


def main():
    app = QApplication(sys.argv)
    app.setStyleSheet(style_QLineEdit())
    w = QMainWindow()
    w.setMinimumSize(200, 100)
    w.setCentralWidget(Frame(w))
    w.show()
    sys.exit(app.exec())