PyQt QFileDialog getOpenFileName 无法从命令行运行 (windows)

Question

我正在尝试制作一个 gui (Qt Designer) 来导入 excel 文件并在 gui 中显示数据。

当我从我的 IDE (Spyder) 中运行它时，该脚本工作正常，但是如果我从命令 window 或通过打开来自 windows 资源管理器的 python 文件，导入功能不起作用。（gui 启动正常，但是当按下导入按钮并 selected 文件时，没有任何反应，也没有产生错误。当从 Spyder 运行ning 时，数据被导入并显示在如预期的 gui）。

如果我预先 select 文件位置（在下面的代码中注释掉），那么脚本可以从命令行或通过从资源管理器中单击来正常工作。

感谢您的帮助！

Python2.7（蟒蛇），Windows10，PyQt4

import sys
from PyQt4 import QtGui
from excel_import_gui import Ui_MainWindow
import xlrd


class Main(QtGui.QMainWindow):
    def __init__(self):
        QtGui.QMainWindow.__init__(self)
        self.ui = Ui_MainWindow()
        self.ui.setupUi(self)

        self.setupSignals()      


    def set_import_data(self,data_to_import,table_to_change):
        for row in range(len(data_to_import)):
            for col in range(len(data_to_import[0])):
                table_to_change.setRowCount(len(data_to_import))
                table_to_change.setColumnCount(len(data_to_import[0]))
                item = data_to_import[row][col]      
                table_to_change.setItem(row,col,QtGui.QTableWidgetItem(str(item)))


    def setupSignals(self):
        self.ui.importData_btn.clicked.connect(self.select_file)


    def select_file(self):
        excel_file = QtGui.QFileDialog.getOpenFileName(self,
        "Select Excel file to import","","Excel (*.xls *.xlsx)")

#        excel_file = "C:/Users/Ben/Work/Python tests/Qt GUIs/Excel_import_GUI/fish_test.xlsx"


        if excel_file:
            open_excel_file = xlrd.open_workbook(excel_file)
            self.start_import_data(open_excel_file)


    def start_import_data(self, workbook):
        #import data from excel file 
        workbook_data = []
        for sheetNum in range (workbook.nsheets):
            worksheet = workbook.sheet_by_index(sheetNum)
            workbook_data.append([[worksheet.cell_value(row,col) for col in range (worksheet.ncols)] for row in range(worksheet.nrows)])

        # Set each worksheet of workbook_data to each tab in GUI widget
        self.set_import_data(workbook_data[0],self.ui.fish_table)
        self.set_import_data(workbook_data[1],self.ui.boats_table)


if __name__ == "__main__":
    app = QtGui.QApplication(sys.argv)
    window = Main()
    window.show()
    sys.exit(app.exec_())

Answer 1

好吧，我自己找到了一个解决方案，将 excel_file 变量转换为字符串。

excel_file = str(QtGui.QFileDialog.getOpenFileName(self, "Select Excel file to import","","Excel (*.xls *.xlsx)"))

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