FAQ: How do I calculate what quoted strings and numbers mean?

Fredrik Lundh fredrik at pythonware.com
Wed Nov 15 09:37:48 CET 2006


p.lavarre at ieee.org wrote:

> I was happy enough when I saw an improvement like:
> 
>>>> import os
>>>> result = eval("os.system('pwd')")
> .../Desktop
>>>> result = eval("os.system('pwd')", {"whatever": {}})
> Traceback (most recent call last):
>   File "<stdin>", line 1, in <module>
>   File "<string>", line 1, in <module>
> NameError: name 'os' is not defined

sure, but the os module isn't very far away:

 >>> result = eval("__import__('os').system('pwd')", {"whatever": {}})
/home/fredrik

</F>




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