working through Python programming

[karltheneale]

Hi, I've been working through some tasks and keep getting an error can anyone help please?

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from tkinter import *

class App:

    def _init_(self, master):
        frame = Frame(master)
        frame.pack()
        Label (frame, text='deg C').grid(row=0, column=0)
        button = Button(frame, text='Convert', command=self.convert)
        button.grid(row=1)

    def convert(self):
        print('Not Implemented')

root = Tk()
root.wm_title('Temp Converter')
app = App(root)
root.mainloop()

error
Traceback (most recent call last):
File "C:/Users/Steve/Desktop/Python/Hello.py", line 17, in <module>
app = App(root)
TypeError: object() takes no parameters

[ame]

Please use

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tags around your code, otherwise it's impossible to read.

[B.Goode]

Please use

Code: Select all

tags around your code, otherwise it's impossible to read.

+1

But from what we can see -

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File "C:/Users/Steve/Desktop/Python/Hello.py", line 17, in <module>
app = App(root)
TypeError: object() takes no parameters

app is going to be an instance of the class App. And you have defined App to have no parameters. So the error message is telling you that you have provided a parameter ( root ) that it can't use.

Whether you fix this in the class definition or at the place where it is called depends on what you want to achieve.

[karltheneale]

This works fine

Code: Select all

from tkinter import *

class MyApp:                         ### (1)
	def __init__(self, myParent):      ### (1a)
		self.myContainer1 = Frame(myParent)
		self.myContainer1.pack()
		
		self.button1 = Button(self.myContainer1) 
		self.button1["text"]= "Hello, World!"     
		self.button1["background"] = "green"      
		self.button1.pack()	                       
		
root = Tk()
myapp = MyApp(root)  ### (2)
root.mainloop()      ### (3)

i don't understand why this would work and the other doesn't

[ame]

Your "init" has a single underscore. The working example has two.

[karltheneale]

Your "init" has a single underscore. The working example has two.

brilliant reply thank you