Menu
I am a newbie to python programming and am still trying to figure out the use of lambda. Was worrking on some gui program after much googling i figured that i need to use this for buttons to work as i need it to
THIS WORKS
mtrf = Button(root, text = "OFF",state=DISABLED,command = lambda:b_clicked("mtrf"))
but when i do the same for Scale it does not work
leds = Scale(root,from_=0,to=255, orient=HORIZONTAL,state=DISABLED,variable =num,command =lambda:scale_changed('LED'))
528
This is a post to explain How To Fix Python TypeError – “Class Takes No Arguments (1 Given)”. This error occurs due to incorrect use of self parameter. The errors happens because the func () is a method within a Class. As such the first argument is expected to be a “self” parameter.
Python TypeError: object () takes no arguments Solution. The arguments a class object accepts are passed through a function called __init__ (). If you misspell this function in your class declaration, you’ll encounter a “TypeError: object () takes no arguments” error when you run your code.
The arguments a class object accepts are passed through a function called __init__ (). If you misspell this function in your class declaration, you’ll encounter a “TypeError: object () takes no arguments” error when you run your code. In this guide, we talk about what this error means and why you may encounter it.
The Python "TypeError: takes 0 positional arguments but 1 was given" occurs for multiple reasons: Forgetting to specify the self argument in a class method. Forgetting to specify an argument in a function. Passing an argument to a function that doesn't take any arguments.
Scale calls the function passed as command with one argument, so you have to use it (although throw it away immediately).
Change:
command=lambda: scale_changed('LED')
to
command=lambda x: scale_changed('LED')
This is presumably because the command is passed an argument that perhaps you don't want. Try changing the lambda from
command=lambda:scale_changed('LED')
to
command=lambda x:scale_changed('LED')
If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
Donate Us With
