The someiterable should be something that has a .next
method. That would be a list or any object with such a
method. In your case it would be the images list.
The writer method will iterate over the list and write
everything out for you. Don't put it inside a loop
yourself. More like (not tested):
import csv
.
.
.
outfile=open(r'D:\path\to\filename_sort1.csv', 'w')
CSVwriter=csv.writer(outfile, dialect='excel', delimiter='|')
CSVwriter.writerows(images)
Larry Bates
>
>
> if __name__ == '__main__':
> images = read_images(r"D:\path\to\imagespipe.csv")
>
> def get_key(*attr_names):
> def key(image):
> return [getattr(image, name) for name in attr_names]
> return key
>
> images.sort(key = get_key("filename"))
>
> t = open(r'D:\path\to\filename_sort1.csv', 'w')
>
> for image in images:
> print book
> #t.write('%s\n' % book) %Before I needed | delimited, this
> worked
> #csv.writer(t, dialect='excel', delimiter='|')
> output = csv.writer(t, dialect='excel', delimiter='|')
> output.writerows()
> #output.writerows(image)
> #output.writerow(image)
>
> t.close()
-Larry Bates
googleboy wrote:
> Hi. I am trying to write out a csv file with | instead of comma,
> because I have a field that may have many commas in it. I read in a
> csv file, sort it, and want to write it out again.
>
> I read the example that says:
>
> import csv
> writer = csv.writer(open("some.csv", "wb"))
> writer.writerows(someiterable)
>
> The "someiterable" is what is confusing me.
>
>
>
> class Image(object):
> def __init__(self, title, date, genre, data, value, filename):
> params = locals()
> del params['self']
> self.__dict__.update(params)
> def __repr__(self):
> all_items = self.__dict__.items()
> return '%s,%s,%s,%s,%s, %s' % (self.title, self.date,
> self.genre, self.data, self.value, self.filename)
>
> def read_images(filename):
> csv_file = open(filename, "rb")
> reader = csv.reader(csv_file, dialect='excel', delimiter='|')
> images = [Image(*[field.strip() for field in row]) for row in
> reader]
> csv_file.close()
> return books
>
> def sort_images(filename, *attr_names):
> csv_file = open(filename, "rb")
> reader = csv.reader(csv_file, dialect='excel', delimiter='|')
>
>
> if __name__ == '__main__':
> images = read_images(r"D:\path\to\imagespipe.csv")
>
> def get_key(*attr_names):
> def key(image):
> return [getattr(image, name) for name in attr_names]
> return key
>
> images.sort(key = get_key("filename"))
>
> t = open(r'D:\path\to\filename_sort1.csv', 'w')
>
> for image in images:
> print book
> #t.write('%s\n' % book) %Before I needed | delimited, this
> worked
> #csv.writer(t, dialect='excel', delimiter='|')
> output = csv.writer(t, dialect='excel', delimiter='|')
> output.writerows()
> #output.writerows(image)
> #output.writerow(image)
>
> t.close()
>
>
>
> This returns an error that says "Error: sequence expected"
>
> My understanding of this is that I am creating a list of lists and I am
> iterating over it (for image in images), and that image is a list, and
> is therefore iterable...?
>
> I am a bit new at this, and would greatly appreciate any assistance.
>
> TIA
>
> googleboy
>
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