Tkinter "Expected boolean value"

[Mike Abel]

Grzegorz Dostatni <grzegorz at ee.ualberta.ca> wrote:

> File "/usr/lib/python2.3/lib-tk/Tkinter.py", line 2310, in selection_present
> return self.tk.getboolean(
> TclError: expected boolean value but got ""

After looking in the man-page of Tcl_GetBoolean here is a more precise
answer.

"Tcl_GetBoolean expects string to specify a boolean value. If string is
any of 0, false, no, or off, then Tcl_GetBoolean stores a zero value at
*boolPtr. If string is any of 1, true, yes, or on, then 1 is stored at
*boolPtr. Any of these values may be abbreviated, and upper-case
spellings are also acceptable."

Hope that helps.

Mike