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pythonpyqtpyqt4pyqt5

How to detect the type of widget?

This should be a stupid question. I am just curious and could not find the answer on my own.

E.g. I define in PyQt5 some widgets:

self.lbl = QLabel("label")
self.btn = QPushButton("click")
self.txt = QLineEdit("text")

Is there any method to detect what kind of widget the self.lbl, self.btn, or self.txt are?

I could imagine: by detecting the widget type, the input is self.lbl, the output should be QLabel... Or something like this.

I have only found the isWidgetType() method. But it is not what I want to have.

Solution

  • There are several ways to get the name of the widget:

    • using __class__:
    print(self.lbl.__class__.__name__)
    • using QMetaObject:
    print(self.lbl.metaObject().className())

    These previous methods return a string with the name of the class, but if you want to verify if an object belongs to a class you can use isinstance():

    is_label = isinstance(self.lbl, QLabel)

    Another option is to use type() but it is not recommended, if you want to get more information about isinstance() and type() read the following: What are the differences between type() and isinstance()?