CODEWITHSUNDEEP
pythonpyqtevent-handlingpyqt5desktop-application
Graygood
Graygood

Reputation: 373

Passing data from one fucntion to another. Python

I am working on an app and I have made a UI with the qt5 creator. I have a function bound to a button.

self.dataChooseBtn.clicked.connect(self.selectFile)
self.data_processing.clicked.connect(self.process)

def selectFile(self):    
    options = QFileDialog.Options()
    options |= QFileDialog.DontUseNativeDialog
    fileName, _ = QFileDialog.getOpenFileName(self,"Выберите стандартизированную выборку", "","All Files (*);;Python Files (*.py)", options=options)
    if fileName:
        print(fileName)
        return fileName

When pressing this button, I get a dialog window, where I can choose a file.

Also, I have a function, that should process the chosen file. Right now, the path to file and its name are hardcoded.

def process(self):
    file_location = "/Users/Graygood/Desktop/Science\ comput/Application/Sheet.xlsx"
    sample = pd.read_excel('Sheet.xlsx', sheetname ='Sheet1', index_col=None, na_values=['NA'])

What I want, is to get the output of a selectFile() function (triggered by the click) (for example: /Users/Graygood/Desktop/Science comput/Application/Sheet.xlsx) and insert it into process() function (also triggered by the click), without triggering the dialog window again. Which happens if I just call selectFile() function in process() one.

def process(self):
    fileName = self.selectFile()
    file_location = fileName
    sample = pd.read_excel('Sheet.xlsx', sheetname ='Sheet1', index_col=None, na_values=['NA'])

Upvotes: 0

Views: 107

Answers (2)

Vikash Singh
Vikash Singh

Reputation: 14001

All you need to do is get the open file path on button click. And call the process method on the file_path

def selectFile(self):    
    options = QFileDialog.Options()
    options |= QFileDialog.DontUseNativeDialog
    # read the file path
    file_path, _ = QFileDialog.getOpenFileName(self,"Выберите стандартизированную выборку", "","All Files (*);;Python Files (*.py)", options=options)
    if file_path:
        # print the file_path and call process on it.
        print(file_path)
        self.process(file_path)
        return file_path

def process(self, file_path):
    # read the file at path and process it
    sample = pd.read_excel(file_path, sheetname ='Sheet1', index_col=None, na_values=['NA'])
    print("processed")

Upvotes: 1

Yohboy
Yohboy

Reputation: 254

You should use fileName as a class attribute and so store your filename to be able to keep track if you want to reuse it without passing it in all your function.

Just need to change selectFile to:

def selectFile(self):    
    options = QFileDialog.Options()
    options |= QFileDialog.DontUseNativeDialog
    fileName, _ = QFileDialog.getOpenFileName(self,"Выберите стандартизированную выборку", "","All Files (*);;Python Files (*.py)", options=options)
    if fileName:
        print(fileName)
        self.fileName = fileName

and then call self.fileName in process(self).

To avoid error, you should also declare it in init method : self.fileName = None and always test if self.fileName exists before trying to use it.

Hope this help.

Upvotes: 1

Related Questions