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Showing content from https://mail.python.org/pipermail/python-dev/2009-May/089792.html below:

[Python-Dev] Indentation oddness...

[Python-Dev] Indentation oddness...Guido van Rossum guido at python.org
Sat May 30 04:19:34 CEST 2009
I usually append some extra newlines before passing a string to
compile(). That's the usual work-around. There's probably a subtle bug
in the tokenizer when reading from a string -- if you find it, please
upload a patch to the tracker!

--Guido

On Fri, May 29, 2009 at 5:52 PM, Dino Viehland <dinov at microsoft.com> wrote:
>> The 'single' mode, which is used for the REPL, is a bit different than
>> 'exec',
>> which is used for modules. This difference lets you insert "blank"
>> lines of
>> whitespace into a function definition without exiting the definition.
>> Ending
>> with a truly empty line does not cause the IndentationError, so the
>> REPL can
>> successfully compile the code, signaling that the user has finished
>> typing the
>> function.
>
> Sorry, I probably should have mentioned this but it repros w/
> compile(..., "exec") as well:
>
>>>> code = "def  Foo():\n\n    pass\n\n  "
>>>> compile(code, 'foo', 'exec')
> Traceback (most recent call last):
>  File "<stdin>", line 1, in <module>
>  File "foo", line 5
>
> IndentationError: unindent does not match any outer indentation level
>
> It also repros when passing in PyCF_DONT_IMPLY_DEDENT for flags under
> single and exec.
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-- 
--Guido van Rossum (home page: http://www.python.org/~guido/)
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