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pythonpyqtqlineeditsetattr

Using setattr() on a UI element

I am trying to use setattr on a UI element (QLineEdit) to fill in with what was read from a text file. I believe in order to set a QlineEdit it would be self.lineEdit.setText()

The text file I am reading consists of a Name and it's value:

Name1=Value1

splitLine[0] consists of "Name1", and splitLine[1] is "Value1". self.Name1 is the name of the lineEdit I am changing, hence I used eval() to pass the actual value "Name1" to setattr.

I am not sure how to go about setting the value. Right now I have tried these with no success:

setattr(self, eval("splitLine[0]"), eval("splitLine[1]"))

setattr(self, eval("splitLine[0]"), setText(eval("splitLine[1]")))

Also, using:

self.splitLine[0].setText(splitLine[1])

Does not work as it thinks the actual object is called splitLine, rather than it's value (hence why I tried eval() ).

# AttributeError: 'Ui_Dialog' object has no attribute 'splitLine'
Solution

  • You need to use getattr, not setattr. That is, you first need to get the line-edit object (via its attribute name), so that you can then call its setText method to populate the field:

        lineEdit = getattr(self, splitLine[0])
    lineEdit.setText(splitLine[1])

    or in one line:

        getattr(self, splitLine[0]).setText(splitLine[1])