Python Tkinter Lambda Multiple Variable

Question

Quick question. I have created a button like this:

LABEL = tkinter.Button(top, text ="GO 1", command = lambda *args: go('1'), width = 13, height=2)

So, I was wondering. How can I pass multiple values to definition using lambda in the button above?

def go(value):

Thanks!

You question is unclear. The command callback does not accept argument. What arguments do you want to pass to it? — doraemon
– doraemon, Commented Jul 11, 2018 at 7:42
lambda x = "1": go(x), Multiple type arguments are not supported (just one)! So go(list,str,str,int) never work, and all type definitions is uniterable(just use event or tag). — dsgdfg
– dsgdfg, Commented Jul 11, 2018 at 8:27
@dsgdfg: your comment isn't true. You can use multiple arguments with lambda. — Bryan Oakley
– Bryan Oakley, Commented Jul 11, 2018 at 12:00
True, but that depends on the condition. If an element is not in global reach (created by iteration), it is necessary to give it a single argument or use the tag name as a variable. As the number of arguments increases, probability and combinations also increase, which significantly extends the writing of code, causing additional performance loss (response time, system resources, etc.). @BryanOakley — dsgdfg
– dsgdfg, Commented Jul 13, 2018 at 8:47
@dsgdfg: yes, more arguments == more complexity. However, you said it was impossible. It's not impossible. — Bryan Oakley
– Bryan Oakley, Commented Jul 13, 2018 at 11:40

figbeam · Accepted Answer · 2018-07-11 13:26:38Z

3

Put values in function call:

LABEL = tkinter.Button(top, text ="GO 1", command=lambda: go('1', 'a', True))

Then unpack the values in the function definition:

def go(*values):
    print(values)

answered Jul 11, 2018 at 13:26

figbeam

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Comments

SomeMosa · Accepted Answer · 2018-07-12 00:06:41Z

1

You could always use a tuple or a list like this:

def go(value):
    for val in value:
        print(val)

Create the button like this:

LABEL = tkinter.Button(top, text ="GO 1", command=lambda: go(('1', 'a', True)))

Or like this:

LABEL = tkinter.Button(top, text ="GO 1", command=lambda: go(['1', 'a', True]))

answered Jul 12, 2018 at 0:06

SomeMosa

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Chris · Accepted Answer · 2022-11-22 13:33:43Z

-1

Create a tuple and use it as a normal variable so you can add two or more variable in one tuple and transfer them with button:

Chris

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answered Nov 17, 2022 at 4:45

1

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