Why Python Needs Perl's use strict

Having been playing with Python again after a couple of years away from it I had a good bunch of people to teach it too, and they had some good questions.  One of which came up during exceptions.

Now we all know that Python allows you to create variables on the fly and to declare them you must assign to them first;
myvar="hello world"

But imagine the following scenario where you have declared your variable such as a file handle to open a file, but you have used an exception to capture the fact that the file does not exist and in your except section have a typo for the file handle object.



try:
        fh=open("usestrict")
        for x in fh:
                print x,"\n"
except IOError:
        print "File could not be opened"
        ofh.close()

ofh.close()

So the Python Guy had a post at the following;

http://pythonguy.wordpress.com/2008/09/18/perl-really-sucks-and-they-dont-even-realize-it/

Well, clearly from the above code I would not get a compile error and my exception would happen and even if I didn't get the exception my my code would run and when it came to closing the file I'd get a NameError exception from Python.

Are you sure Python doesn't need a use strict?  Are Python developers that confident that they don't make typos?