pe 6. elok. 2021 klo 19.15 MRAB (pyt...@mrabarnett.plus.com) kirjoitti:
> On 2021-08-06 16:50, Suretha Weweje wrote:
> > I am trying to upload a CSV file with flask, read and process one line
> at a
> > time while iterating through all rows of the file and write the results
> > back to a new CSV file. My python script produces the correct results on
> > its own, but I am not able to get the same results when using Flask. I am
> > new to flask.
> >
> [snip]
> >
> > csv_reader = csv.reader(new)
> >
> [snip]
> >
> > *mywriter = csv.DictWriter('results.csv', fieldnames=headers_new)*
> [snip]
>
> The problem has nothing to do with Flask.
>
> 'csv.reader' and 'csv.DictWriter' expect a file object, but you're
> passing them strings.
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May be you should use io.StringIO to create a file/stream from an input
string.
from io import StringIO
s = "\n".join(["a","b","c"]) + "\n"
for line in StringIO(s):
print(f"\t{line}")
BR,
Roland
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