PyQt5 add widgets with a loop dynamically

Question

I'm trying to write a simple program that will display pc drives information like letter assigned, total memory in GB etc. Since everyone has a different number of drives this must be dynamic. I am using PyQt5 for GUI. I am trying to display letters of my drives but I can't seem to be able to dynamically add new widgets, I always get the last letter only. Here's how it looks like now. First I setup a grid:

self.gridLayoutWidget_3 = QtWidgets.QWidget(self.centralwidget)
self.gridLayoutWidget_3.setGeometry(QtCore.QRect(10, 210, 741, 71))
self.gridLayoutWidget_3.setObjectName("gridLayoutWidget_3")
self.DrivesData = QtWidgets.QGridLayout(self.gridLayoutWidget_3)
self.DrivesData.setContentsMargins(0, 0, 0, 0)
self.DrivesData.setObjectName("DrivesData")

Then I try to add new label widgets depending on the number of drives:

for disk in disksInfo:
    self.DRIVELETTERSPACE = QtWidgets.QLabel(self.gridLayoutWidget_3)
    self.DRIVELETTERSPACE.setObjectName("DRIVELETTERSPACE")
    self.DrivesData.addWidget(self.DRIVELETTERSPACE, 1, 0, 1, 1)

With the above code all I get displayed is the last drive's letter(E:). I think I understand that I shouldn't name all of them DRIVELETTERSPACE but then how can I make the names dynamic as well? Also, is this how I can dynamically add widgets in pyqt5? Or should I make the grid dynamic as well? Thanks.

try with key = 0 for disk in disksInfo: DRIVELETTERSPACE = QtWidgets.QLabel(self.gridLayoutWidget_3) DRIVELETTERSPACE.setObjectName("DRIVELETTERSPACE") DrivesData.addWidget(self.DRIVELETTERSPACE, key, 0) key += 1 — eyllanesc
– eyllanesc, Commented Oct 22, 2017 at 13:34
You have to add the widget to a different row and column, besides do not use self for a variable that is being updated in a loop since it could be eliminating the previous data. — eyllanesc
– eyllanesc, Commented Oct 22, 2017 at 13:36
This seems to be working. I think I need to assign a dynamic name as well. Any idea how could this be done(I'm going to try now). — davidb
– davidb, Commented Oct 22, 2017 at 14:06
you could create a list or a dictionary that is a member of the class where you store the variables. — eyllanesc
– eyllanesc, Commented Oct 22, 2017 at 14:08
Allow me to elaborate a bit. The previous loop created a new widget for each drive in the loop. I can see in gui that there's extra space created. I also have another loop for displaying the disk letters in those widgets. Here's how it looks like: for disk in disksInfo: diskLetter = disk.Caption DRIVELETTERSPACE.setText(_translate("MainWindow", diskLetter)) — davidb
– davidb, Commented Oct 22, 2017 at 14:10

eyllanesc · Accepted Answer · 2017-10-22 15:05:39Z

1

In your code you have 2 errors, the first case is that you are adding the widget to the same position for it you must create some method to be able to vary the indices; the other error is to create a member of the class as iterator, for this you just delete self, for example:

key = 0 
for disk in disksInfo: 
    DRIVELETTERSPACE = QtWidgets.QLabel(self.gridLayoutWidget_3) 
    DRIVELETTERSPACE.setObjectName("DRIVELETTERSPACE") 
    DrivesData.addWidget(DRIVELETTERSPACE, key, 0) 
    key += 1

If you want to save the widget it is advisable to save them in a list or dictionary since later we can obtain them through an index or key, respectively.

answered Oct 22, 2017 at 15:05

eyllanesc

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