Question

因此，Im目前仅从ZeroMQ消息系统中获取有限的数据，并将其全部添加到Dataframe，然后使用从堆栈中的某人获取的代码将Dataframe转换为Pandas模型。然后通过PyQt5 Tableview运行该模型。

每次我运行tableview代码时，将Dataframe转换为Tableview模型后，内核就会死掉。我试图至少处理一个异常，但它甚至不会引发超一般的运行时错误。每次都死了......

出于测试目的，我使用了带有数据的CSV试图将其转换为可行的模型。由于没有硬编码格式，因此可以使用任何csv或数据进行测试。

from PyQt5 import QtCore, QtGui, QtWidgets
import pandas as pd


class PandasModel(QtCore.QAbstractTableModel):     
    def __init__(self, df = pd.DataFrame(), parent=None): 
        QtCore.QAbstractTableModel.__init__(self, parent=parent)
        self._df = df

    def headerData(self, section, orientation, role=QtCore.Qt.DisplayRole):
        if role != QtCore.Qt.DisplayRole:
            return QtCore.QVariant()

        if orientation == QtCore.Qt.Horizontal:
            try:
                return self._df.columns.tolist()[section]
            except (IndexError, ):
                return QtCore.QVariant()
        elif orientation == QtCore.Qt.Vertical:
            try:
                # return self.df.index.tolist()
                return self._df.index.tolist()[section]
            except (IndexError, ):
                return QtCore.QVariant()

    def data(self, index, role=QtCore.Qt.DisplayRole):
        if role != QtCore.Qt.DisplayRole:
            return QtCore.QVariant()

        if not index.isValid():
            return QtCore.QVariant()

        return QtCore.QVariant(str(self._df.ix[index.row(), index.column()]))

    def setData(self, index, value, role):
        row = self._df.index[index.row()]
        col = self._df.columns[index.column()]
        if hasattr(value, 'toPyObject'):
            # PyQt4 gets a QVariant
            value = value.toPyObject()
        else:
            # PySide gets an unicode
            dtype = self._df[col].dtype
            if dtype != object:
                value = None if value == '' else dtype.type(value)
        self._df.set_value(row, col, value)
        return True

    def rowCount(self, parent=QtCore.QModelIndex()): 
        return len(self._df.index)

    def columnCount(self, parent=QtCore.QModelIndex()): 
        return len(self._df.columns)

    def sort(self, column, order):
        colname = self._df.columns.tolist()[column]
        self.layoutAboutToBeChanged.emit()
        self._df.sort_values(colname, ascending= order == QtCore.Qt.AscendingOrder, inplace=True)
        self._df.reset_index(inplace=True, drop=True)
        self.layoutChanged.emit()   


def createview(title, model):
    try:
        view = QtWidgets.QTableView()
        view.setWindowview
    except:
        raise RuntimeError("I know python!")


if __name__=="__main__":
    df=pd.read_csv("C:\Excel Sheets\Test_CSV_6-18-18.csv")
    model = PandasModel(df)
    createview("Model", model)

PyQt5 TableView杀死内核

0 个答案: