CSV with comments

[Daniel Dittmar]

GinTon wrote:
> GinTon wrote:
>> In csv.reader, is there any way of skip lines that start whith '#' or
>> empty lines
>> I would add comments at my CSV file
> 
> For skip comment I get a dirty trick:
> 
> reader = csv.reader(open(csv_file))
> for csv_line in reader:
>     if csv_line[0].startswith('#'):
>         continue
> 
> But not possible let blank lines.
> 
> I think that CSV class should to let skip comments and new lines of
> auto. way.
> 

write an iterator that filters line to your liking and use it as input 
to cvs.reader:

def CommentStripper (iterator):
     for line in iterator:
         if line [:1] == '#':
             continue
         if not line.strip ():
             continue
         yield line

reader = csv.reader (CommentStripper (open (csv_file)))

CommentStripper is actually quite useful for other files. Of course 
there might be differences if a comment starts
- on the first character
- on the first non-blank character
- anywhere in the line

Daniel