How to get TabError?

[Jeff Epler]

When running with "-tt", you can get this error.

[jepler at sofa src]$ python -tt
Python 2.3.3 (#1, May  7 2004, 10:31:40) 
[GCC 3.3.3 20040412 (Red Hat Linux 3.3.3-7)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> exec "def f():\n\ta\n        b"
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
  File "<string>", line 3
    b
    ^
TabError: inconsistent use of tabs and spaces in indentation

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