Page 335 -

exception handler

Exception Magnets Solution

You were asked to assemble the code to handle an exception in the
save_data() function. The exception handler needs to display
the details of the exception in the title bar of the window. You
needed to remember to indent the code in the exception handler, in
addition to the code in the try block.

def save_data():
try:

fileD = open("deliveries.txt", "a")
fileD.write("Depot:\n")
fileD.write("%s\n" % depot.get())
fileD.write("Description:\n")
fileD.write("%s\n" % description.get())
fileD.write("Address:\n")
fileD.write("%s\n" % address.get("1.0", END))
depot.set("")
description.delete(0, END)
description.delete(0, END)
We’re using format strings to
address.delete("1.0", END) display the exception in the title.

except Exception as ex:

This is the exception app.title( "Can’t write to the file %s" % ex )
handler code.

The exception handler can have
several lines as long as they are
all indented in the same way.

300 Chapter 8 ½