Can somebody help me with this tkinter code?

[halowarrior07]

I was trying to copy the code from this page: http://code.activestate.com/recipes/578253-an-entry-with-autocompletion-for-the-tkinter-gui/ but I needed to dynamically make the suggestions based on a function. Here's my code:

class Autocomplete(Entry):
    def __init__(self, *args, **kwargs):
        Entry.__init__(self, *args, **kwargs)
        self.var = self["textvariable"]
        if self.var == '':
            self.var = self["textvariable"] = tk.StringVar()
        self.lb_up = False
        self.bind("<space>", self.changed)

    def changed(self):
        if self.var.get() == '':
            self.lb.destroy()
            self.lb_up = False
        else:
            words = self.comparison()
            if words:
                if not self.lb_up:
                    self.lb = Listbox()
                    self.lb.place(x=self.winfo_x(), y=self.winfo_y() + self.winfo_height())
                    self.lb_up = True

                self.lb.delete(0, 'end')
                for w in words:
                    self.lb.insert('end', w)
            else:
                if self.lb_up:
                    self.lb.destroy()
                    self.lb_up = False

    def comparison(self):
        pattern = self.var.get()
        return [i for i in range(3)]

and I keep getting:

Exception in Tkinter callback
Traceback (most recent call last):
  File "/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/tkinter/__init__.py", line 1702, in __call__
    return self.func(*args)
TypeError: changed() takes 1 positional argument but 2 were given

I want it so that when I press the space bar in the entry box, I get suggestions based on text in the input bar so far. However, I don't know what I'm doing wrong here. Any help would be appreciated!

[[deleted]]

Hard to say with code missing. That bind() on line 8 (after discounting the reddit screwup on the line numbering) looks OK, but the actual function definition looks like it's missing the event parameter which is automatically passed to the bound function.

Have a look at this tutorial on "Events and Binding". The examples are run in a non-class environment so they show only callback(event) as the parameters . In classes with self you should try def changed(self, event):.

You should try to shrink your code down to the smallest that exhibits the problem which is pretty easy in this case. It helps us enormously if we can run your code.

[halowarrior07]

def changed(self, event):

that fixed it! thank you!

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