exception handling with try/except in python 2.7
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I'm experimenting with exception handling / error trapping and was wondering why the below code doesn't work. I'm using python 2.7. I understand the difference between input() and raw_input() and understand that raw_input() has been renamed to input() in python 3.0. If I enter an integer then the code keeps looping until I enter a string. I get the below error message when entering a string. Is there a way around this or is this just one of those python quirks?

      File "<some_directory_path_goes_here>", line 30, in <module>
        enterAge = input('Enter your age as an integer: ')
      File "<string>", line 1, in <module>
    NameError: name '<user_entered_string_goes_here>' is not defined

In python 2.7 it would seem to me that the code should still work.

    # this doesn't work in python 2.7, issue of entering a string with input()
    from types import IntType
    age = 0
    while True:
        enterAge = input('Enter your age as an integer: ')
        try:
            if type(enterAge) is IntType:
                num = enterAge
                age = age + num
                print str(age) + ' is old!'

        except TypeError:
            print 'You did\'t enter an integer'
            break