Variable passing to external program - How??

[Christopher Koppler]

On Sat, 11 Oct 2003 15:22:36 GMT, Christopher Koppler
<klapotec at chello.at> wrote:

>On Sat, 11 Oct 2003 16:08:46 +0000, Rigga <Rigga at noemail.com> wrote:
>
>>Christopher Koppler wrote:
>>
>>> On Sat, 11 Oct 2003 15:50:29 +0000, Rigga <Rigga at noemail.com> wrote:
>>> 
>>>>FilePath = os.path('/home/rigga')
>>>>AccFlag = os.access('% FilePath',os.R_OK)
>>>>
>>>>I would expect % FilePath to contain /home/rigga
>>> 
>>> Why would you expect that?
>>
>>because Ive assigned it using the  FilePath = os.path('/home/rigga') -
>>surely therefore FilePath contains the value /home/rigga???????
>
>Yes, but what do you think that '% FilePath' means? This is an
>ordinary string, and does not magically expand to the variable's
>contents, which I assume you wanted. You need to use just the variable
>name for that:
>
>AccFlag = os.access(FilePath, os.R_OK)
>
>If you wanted to use the % operator for strings, you could also write
>that as
>
>AccFlag = os.access('%s' % FilePath, os.R_OK)
>
>which is completely unnecessary in this case, however.

And also, I completely overlooked:
FilePath = os.path('/home/rigga') will not work either, because
os.path is a _module_ (which is not callable), not a function to
create paths. Pathnames are just strings, so

FilePath = '/home/rigga'

is what you want.


--
Christopher