How to 'tie' QFileDialog to send selected files to an imported handler module?

Question

I have a 'treatment.py' module, which needs 2 files to be input: defects.csv and data.csv. Instead of directly writing the path, I decided to use the QFileDialog dialog from PyQt5. When I select both files, the following error occurs:

Traceback (most recent call last): File "D:/...", line 63, in <module> tr.treat(defects, data) File "D:\Working\ML\Трещины CD\treatment.py", line 16, in treat def90_18 = pd.read_csv(p_def90_18, sep=';', encoding='latin-1') File "C:\Python\lib\site-packages\pandas\io\parsers.py", line 702, in parser_f return _read(filepath_or_buffer, kwds) File "C:\Python\lib\site-packages\pandas\io\parsers.py", line 413, in _read filepath_or_buffer, encoding, compression) File "C:\Python\lib\site-packages\pandas\io\common.py", line 232, in get_filepath_or_buffer raise ValueError(msg.format(_type=type(filepath_or_buffer))) ValueError: Invalid file path or buffer object type: <class '__main__.App1'>

I use the following dialog box code:

 import sys from PyQt5.QtWidgets import QApplication, QWidget, QFileDialog import treatment as tr class App1(QWidget): def __init__(self): super().__init__() self.left = 500 self.top = 300 self.width = 640 self.height = 480 self.initUI() def initUI(self): self.setGeometry(self.left, self.top, self.width, self.height) self.openFileNameDialog1() self.show() self.close() def openFileNameDialog1(self): global defects options = QFileDialog.Options() options |= QFileDialog.DontUseNativeDialog defects, _ = QFileDialog.getOpenFileName(self,"Выберите файл с \"defects\" ", "", '(*.csv)', options=options) if defects: return defects class App2(QWidget): def __init__(self): super().__init__() self.left = 500 self.top = 300 self.width = 640 self.height = 480 self.initUI() def initUI(self): self.setGeometry(self.left, self.top, self.width, self.height) self.openFileNameDialog2() self.show() self.close() def openFileNameDialog2(self): global data options = QFileDialog.Options() options |= QFileDialog.DontUseNativeDialog data, _ = QFileDialog.getOpenFileName(self, "Выберите файл \"data\" ", "", '(*.csv)', options=options) if data: return data if __name__ == '__main__': app = QApplication(sys.argv) defects = App1() data = App2() tr.treat(defects, data) sys.exit(app.exec_())

What am I doing wrong?

And if so: defects = App1().openFileNameDialog2() and it is unclear why you are making such a call inside the global defects method?
I made global defects so that defects and data are available for tr.treat (defects, data).
If you do 'defects = App1 (). OpenFileNameDialog2 ()', then two windows are called.
everything is assigned to the single variable 'defects', but you need 2: defects and data.
Um, in short, everything has to be redone ... Now I’ll get to the coupon
Do you always have the names of the files defects.csv and data.csv?
Do the App1 and App2 classes necessarily have to be, or are there enough dialog boxes for selecting files?
I tried to redo it, but for some reason the window is called 6 times (3 for openFileNameDialog1 and also 3 for openFileNameDialog2.

Alexander Chernin Alexander Chernin 2,197 3 eight 17 · Accepted Answer · 2019-03-29T10:18:01

Or even the fourth):

 import sys from PyQt5.QtWidgets import QApplication, QWidget, QFileDialog import treatment as tr if __name__ == '__main__': app = QApplication(sys.argv) options = QFileDialog.Options() options |= QFileDialog.DontUseNativeDialog files, _ = QFileDialog.getOpenFileNames(None, "Выберите файлы данных (data.csv) и дефектов (defects.csv)...", "", "csv (*.csv)", options=options) defects = None data = None for(_file in files) if( 'defects' in _file ): defects = _file else if( 'data' in _file ): data = _file if defects and data: tr.treat(defects, data) else: print("Что-то пошло не так [" + defects + "," + data +"]")

By the third option, I meant using the getOpenFileNames function.
This is a handy static function that returns one or more existing files selected by the user.
My 4th is working fine) S. Nick and Alexander Chernin, Thank you very much for your help.

S. Nick S. Nick 5,722 2 five 12 · Answer 2 · 2019-03-29T10:08:39

Try an example, in my opinion you need a third option.

 import sys from PyQt5.QtWidgets import QApplication, QWidget, QFileDialog #import treatment as tr class App1(QWidget): def __init__(self): super().__init__() self.left = 500 self.top = 300 self.width = 640 self.height = 480 self.initUI() def initUI(self): self.setGeometry(self.left, self.top, self.width, self.height) # self.openFileNameDialog1() # self.show() # self.close() def openFileNameDialog1(self): # global defects options = QFileDialog.Options() options |= QFileDialog.DontUseNativeDialog defects, _ = QFileDialog.getOpenFileName(self,"Выберите файл с \"defects\" ", "", '(*.csv)', options=options) if defects: return defects class App2(QWidget): def __init__(self): super().__init__() self.left = 500 self.top = 300 self.width = 640 self.height = 480 self.initUI() def initUI(self): self.setGeometry(self.left, self.top, self.width, self.height) # self.openFileNameDialog2() # self.show() # self.close() def openFileNameDialog2(self): # global data options = QFileDialog.Options() options |= QFileDialog.DontUseNativeDialog data, _ = QFileDialog.getOpenFileName(self, "Выберите файл \"data\" ", "", '(*.csv)', options=options) if data: return data ### vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv class OpenSheet(QFileDialog): def __init__(self): super().__init__() self.setWindowModality(True) self.setFileMode(self.ExistingFiles) self.setAcceptMode(QFileDialog.AcceptOpen) class App3(QWidget): def __init__(self): super().__init__() self.setGeometry(500, 300, 640, 480) def openFileNameDialog3(self): diag = OpenSheet() options = diag.Options() options |= diag.DontUseNativeDialog files, _ = diag.getOpenFileNames(None, "Выберите файл \"data\" )", "", "Csv Files (*.csv)", options=options) if files: print("Selected files: ", files) return files # ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ if __name__ == '__main__': app = QApplication(sys.argv) d1 = App1() defects = d1.openFileNameDialog1() print("defects", defects) d2 = App2() data = d2.openFileNameDialog2() print("data", data) d3 = App3() files = d3.openFileNameDialog3() print("Выбраны фалы: ", files) # tr.treat(defects, data) # sys.exit(app.exec_())

@ Sergey Yershov did you run my example or have you upgraded yours?
If your then delete the lines self.openFileNameDialog1() and self.openFileNameDialog2()

How to 'tie' QFileDialog to send selected files to an imported handler module?

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