Tkinter Entry Widget - Error if Entry is not an int

python, tkinter

Solution

Use `str.isdigit()` to check whether the input is integer or not:

In [5]: "123".isdigit()
Out[5]: True

In [7]: "123.3".isdigit()
Out[7]: False

In [8]: "foo".isdigit()
Out[8]: False

so you code becomes something like this:

def get(self):
    c = self.a.get()
    d = self.b.get()
    if c.isdigit() and d.isdigit():
        c,d=int(c),int(d)
        if c>255 or c<0 or d>255 or d<0 :
            print c
            tkMessageBox.showerror("Error2", "Please enter a value between 0-255")
            self.clicked_wbbalance()
        elif c<255 and c>0 and d<255 and d>0:
            print "it worked"
            pass
    else:
         print "input is not an integer"

Problem

Original source