GUIzero Parameter Programming

[last updated: 2025-11-15]
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• For all widgets, the following cheat sheet will help you find correct code to specify a given parameter:

• border
  • Box
    box01 = Box(mainW, border=3)
    Borders with relief:
    import tkinter as tk
    tmpBox.tk.config(borderwidth=4, relief="sunken") # or "raised" or others...
  • Text widgets don't have borders
    If you want a border around a text field, put the Text widget into a box, and the box can have a border property defined.
  • Pushbutton

• text:
  • Box widgets don't have text property.
    If you want text in a box, create the box, then create a Text widget inside the box.
  • Text widget:
    tmpText = Text(mainW, ..., text="sometext")
    Changing it later:
    tmpText.value = "new text"

    
    Text font color:
    tmpText = Text(mainW, ..., text="sometext", color="red")
    Changing it later:
    tmpText.text_color = "white"

    
    Text font weight:
    Still struggling with this one. Best guess is that you must change the font declaration itself.
    But here's what I tried that did NOT work with my version...
        text01 = Text(parent, text="some text", font_weight="bold")
        text01 = Text(parent, text="some text", bold=True)
        text01.bold = True
        text01.font_weight = "bold"
        text01.font_weight = "strong"

  • Pushbutton

• bg
  • Box
    tmpBox = Box([master], ...
  • Text
    tmpText = Text([master], ..., )
  • Pushbutton