CODEWITHSUNDEEP
pythonstringtkinterlabelappend
Mirac7
Mirac7

Reputation: 1646

Appending text to label tkinter

I'm stuck with a script in Python 3. I want to append additional text to already existing label in tkinter.

I attempted this:

def labelConfig(string,append=False):
    if append:
        label.configure(text+=string)
    else:
        label.configure(text=string)

But it won't compile... How can I do this properly?

Upvotes: 0

Views: 10842

Answers (3)

A. Rodas
A. Rodas

Reputation: 20679

Apart from Bryan Oakley's answer, it also possible to use += if you access the text of the label as a value from a dictionary:

def labelConfig(string,append=False):
    if append:
        label['text'] += string
    else:
        label['text'] = string

All options that can be getted or setted with configure have the equivalent syntax widget['option'] = value, which can be used in situations like this one.

Upvotes: 4

Bryan Oakley
Bryan Oakley

Reputation: 385980

This isn't a tkinter problem, this applies to all of python. You cannot use += when setting a positional argument in a function call. Instead, you must get the value, modify it however you want, then assign the new value to the widget.

For example: 

def labelConfig(string,append=False):
    if append:
        text = label.cget("text") + string
        label.configure(text=text)
    else:
        label.configure(text=string)

Upvotes: 3

code22
code22

Reputation: 133

the text+=string is a statement so it will not return anything. You will need to first get value from label, then concatenate those strings and then pass them as argument

Upvotes: 0

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