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Showing content from https://mail.python.org/pipermail/python-dev/2007-August/074077.html below:

[Python-Dev] make iter() return an empty iterator?

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Georg Brandl wrote:
> Sure, you could use ``iter(())`` or ``iter([])``, but for consistency's sake
> wouldn't it make sense for ``iter()`` to return an empty iterator, as ``str()``
> returns an empty string etc.?
> 
> Georg

There is a difference.

 >>> type(iter)
<type 'builtin_function_or_method'>
 >>> type(str)
<type 'type'>
 >>> type(int)
<type 'type'>
 >>> type(list)
<type 'type'>

Cheers,
    Ron

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