[python-win32] error in list length

[Larry Bates]

knish wrote:
> Hi,
> 
>      Thank you for your reply. I will remember your point and send the code
> from the console.
> 
> BRgds,
> 
> kNish
> 
> 
> Larry Bates wrote:
>> kNish wrote:
>>> Hi,
>>>
>>>               The following lines of code gives an error starting with 
>>> line where len() is used
>>>
>>>
>>>                 local_BkFiles = glob.glob(localDirectoryName+'\\*' + 
>>> data + '*bk*')
>>> local_BkFiles.sort(key=str.upper)
>>> last_pv_File_Name = local_PvFiles[len(local_PvFiles)-1]
>>> split_last_pv_File_Name = 
>>> re.search(data+"_bk[0-9]{2}_[a-z]{3}_pv[0-9]{2}",last_pv_File_Name )
>>> lastPv_FileVersion = 
>>> re.search('(?<=pv)\d+',split_last_pv_File_Name.group(0))
>>>
>>>
>>> This code is being called in a procedure or function def. How may I 
>>> solve this.
>>>
>>>
>>> BRgds,
>>>
>>>
>>> kNish
>>>
>>>
>>> ------------------------------------------------------------------------
>>>
>>> _______________________________________________
>>> python-win32 mailing list
>>> python-win32 at python.org
>>> http://mail.python.org/mailman/listinfo/python-win32
>> Since you didn't post your full traceback (you should always do that in
>> the 
>> future), we are guessing:
>>
>> local_PvFiles isn't defined prior to trying to determine its length.
>>
>> The way to get the last element of a list is:
>>
>> local_PvFiles[-1]
>>
>> you don't need to do all the length gymnastics.
>>
>> I'm no regex expert, so I'll leave that part to someone else but if the 
>> filenames are a fixed format, you don't need regex at all to extract the 
>> version.  If it is a completely variable format, then you would.
>>
>> -Larry
>>
>>
>> _______________________________________________
>> python-win32 mailing list
>> python-win32 at python.org
>> http://mail.python.org/mailman/listinfo/python-win32
>>
>>
> 

What "this" to you want to solve?  I see no traceback, no listing of files, no 
explanation of what you are trying to do.  Help us try to help you.

Taking a second look, You sort local_BkFiles:

local_BkFiles.sort(key=str.upper)

Then you access local_PvFiles:

last_pv_File_Name = local_PvFiles[len(local_PvFiles)-1]

did you mean local_BkFiles?

(a full traceback would have pointed that out immediately)

-Larry