Python - Tkinter - GUI

Question

I'm creating a new application for my current project using Python. This is the first time I use it and it has been a learning experience...

I have a button in my application that calls the askcolor() function from Python. Everything works fine the first time but after that, it gives me the following error.

AttributeError: 'str' object has no attribute 'set'

This is the sequence that I have working in my application:

1. The user click on the Select Color button:

   self.bc_bttn=Button(self, text='Select Color', command=lambda: self.callback())
   

2. The function calls the callback function and I select the proper color

   def callback(self):
        (triple, hexstr) = askcolor()
        if triple:
            triple_string = str(triple)
            triple_string2 = re.findall('[0-9, ]',triple_string);
            triple_bkgColor = ''.join(triple_string2)
            print triple_bkgColor
            self.overlayColorValue.set(triple_bkgColor)
   

3. self.overlayColorValue.set(triple_bkgColor) changes the value of the text field entry so the user will see the correct value on the application

4. I press the Save button

   self.overlayColorValue = self.bc_ent.get()
   body.set('overlay-color', self.overlayColorValue)
   

5. My changes are written to the xml file

   tree.write(CONFIG_XML)
   

6. Everything works fine this time but if I want to do the same thing again to change the color. then I have the following error when I click on the Select Color button

   AttributeError: 'str' object has no attribute 'set'
   

Answer 1

You replaced your self.overlayColorValue attribute with the return value of self.bc_ent.get(), which is a str.

Presumably, before that time, it was a label, and you wanted to call .set() on it instead:

self.overlayColorValue.set(self.bc_ent.get())
body.set('overlay-color', self.overlayColorValue.get())