PyQt5: How to dynamically populate a Qt Window with labels and text input fields

Question

I am creating a basic testing tool for an API, with the following primitive design:

Whenever the combo box is changed, the fields "Test Input" and "Expected Output" should be populated with the labels and input text fields of the related data call. Each data call has different input and output parameters, therefore I cannot create static input fields. I have a mapping for each data call and related input-output parameters. How can I use this mapping to dynamically create labels and text input fields on the UI?

Edit: I could manage how to dynamically populate the UI based on my mapping. It works now for the initial setting of the combo box, but when I change the combo box, UI is not affected. I think I should clear the QScrollArea on each change, but I couldn't manage how to do so.

self.input_scrollArea = QtWidgets.QScrollArea(self.centralwidget)
self.input_scrollArea.setWidgetResizable(True)
self.input_scrollArea.setGeometry(QtCore.QRect(50, 90, 311, 311))
self.input_scrollArea.setObjectName("input_scrollArea")
self.input_scrollAreaWidgetContents = QtWidgets.QWidget()
self.input_scrollAreaWidgetContents.setGeometry(QtCore.QRect(0, 0, 309, 309))
self.input_scrollAreaWidgetContents.setObjectName("input_scrollAreaWidgetContents")
self.input_scrollArea.setWidget(self.input_scrollAreaWidgetContents)

def on_combobox_data_call_changed(self, combobox_index):
    data_call_name = list(DATA_CALL_MAP.keys())[combobox_index]
    y_pos = 40
    for param in DATA_CALL_MAP[data_call_name]["required_params"]:
        exec(f"self.label_{param} = QtWidgets.QLabel(self.input_scrollAreaWidgetContents)")
        exec(f"self.label_{param}.setGeometry(QtCore.QRect(10, {y_pos}, 125, 21))")
        exec(f"self.label_{param}.setObjectName(\"label_{param}\")")
        exec(f"self.label_{param}.setText(_translate(\"TestCaseWindow\", \"{param}:\"))")
        exec(f"self.input_{param} = QtWidgets.QLineEdit(self.input_scrollAreaWidgetContents)")
        exec(f"self.input_{param}.setGeometry(QtCore.QRect(150, {y_pos}, 125, 21))")
        exec(f"self.input_{param}.setObjectName(\"input_{param}\")")
        y_pos += 40