(self)
return entry
Return non-blank entry or None.
Return non-blank entry or None.
Return non - blank entry or None .
def entry_ok(self):  # Example: usually replace.
        "Return non-blank entry or None."
        entry = self.entry.get().strip()
        if not entry:
            self.showerror('blank line.')
            return None
        return entry
def entry_ok ( self ) : # Example: usually replace. entry = self . entry . get ( ) . strip ( ) if not entry : self . showerror ( 'blank line.' ) return None return entry