How can i compare a string which is non null and empty

Shane Geiger sgeiger at ncee.net
Mon Apr 2 04:52:23 CEST 2007


It is probably worth noting that the example is not executable code:  
str() is a function.


sgeiger3 at nycsr0002:~$ python
Python 2.4.4c0 (#2, Jul 30 2006, 15:43:58)
[GCC 4.1.2 20060715 (prerelease) (Debian 4.1.1-9)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
 >>> if str: print "whoah, str is a function!"
...
whoah, str is a function!
 >>>


/me pines for the day when all examples are executable code




Grant Edwards wrote:
> On 2007-04-01, Plissken.s at gmail.com <Plissken.s at gmail.com> wrote:
>
>   
>> how can i compare a string which is non null and empty?
>>     
> [...]
>   
>> In java,I do this:
>> if (str != null) && (!str.equals("")) ....
>>
>> how can i do that in python?
>>     
>
> If you want to litterally do that, it's
>
>   if (str != None) and (str != ""):
>     <whatever>  
>
> However, the standard idiom for doing that in Python is
>
>   if str:
>     <whatever>
>
>
>   

-- 
Shane Geiger
IT Director
National Council on Economic Education
sgeiger at ncee.net  |  402-438-8958  |  http://www.ncee.net

Leading the Campaign for Economic and Financial Literacy

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