Global Variable in Event Function? What am I doing wrong here?

[p_hobbs]

I'm using tkinter to create a data entry form, and I'm having issues with getting the state of a checkbutton. So I determined the simplest way is to set a variable, and change that variable each time the checkbutton is clicked. I've tried everything google has suggested for how to do this, and can't seem to get it to work. So, here is what I've gotten so far, but it tells me that I've got an invalid syntax when trying to set the variable as a global variable.

class efs_form():
    def __init__(self):
        # Average Checkbox
        self.efs_chb_var = IntVar()
        self.efs_avg_chb = Checkbutton(self.efs_ef,
                                  text="Include in Average",
                                  variable=self.efs_chb_var,
                                  bg='black',
                                  fg='Light Blue',
                                  selectcolor='black',
                                  font=("Comic Sans MS", 8, "bold"))
        self.efs_avg_chb.grid(row=3, column=1, pady=(20, 10), sticky=W)
        self.efs_avg_chb.select()
        self.my_var = 1
        self.var = self.efs_chb_var.get()
        self.efs_avg_chb.bind("<Button-1>", self.chb_click)
    def chb_click(self, event):
        global self.my_var
        If self.my_var == 1:
            self.my_var = 0
        else:
            self.my_var = 1
        print(self.my_var)

From what I understand (which is very limited), you have to set a variable to global in the function that you are changing the variable. What am I doing wrong here?

---

I figured this out. I actually don't need to declare the variable as a global variable in the function, and then my "if" statement shouldn't be capitalized. I got it to work just fine now.