限制PyQt QCompleter中的行数

from PyQt5.QtWidgets import QCompleter

class LimitedCompleter(QCompleter):
    def __init__(self, parent=None):
        super().__init__(parent)
        self.limit = 10  # 设置限制的行数，默认为10

    def complete(self):
        # 获取输入文本
        completion_prefix = self.completionPrefix()
        
        if completion_prefix != self.currentCompletion():
            # 设置输入文本
            self.setCompletionPrefix(completion_prefix)
            # 进行匹配过滤
            self.popup().setCurrentIndex(self.completionModel().index(0, 0))
            self.popup().selectionModel().setCurrentIndex(
                self.completionModel().index(0, 0),
                QItemSelectionModel.ClearAndSelect | QItemSelectionModel.Rows
            )
        
        # 获取匹配结果的行数
        rows = min(self.limit, self.completionCount())
        
        # 设置限制行数后的匹配结果
        self.popup().setVisible(rows > 0)
        self.popup().setMinimumWidth(self.edit().width())
        self.popup().setMaximumHeight(
            self.popup().sizeHintForRow(0) * rows + self.popup().frameWidth() * 2
        )

from PyQt5.QtWidgets import QApplication, QMainWindow, QLineEdit, QVBoxLayout, QWidget

if __name__ == '__main__':
    app = QApplication([])
    window = QMainWindow()
    widget = QWidget()
    layout = QVBoxLayout(widget)
    line_edit = QLineEdit()
    completer = LimitedCompleter()  # 创建LimitedCompleter实例
    completer.setModel(model)  # 设置自动补全的模型
    line_edit.setCompleter(completer)  # 将completer应用于输入框
    layout.addWidget(line_edit)
    window.setCentralWidget(widget)
    window.show()
    app.exec()