import csv with open('v.csv', 'w') as csvfile: cwriter = csv.writer(csvfile, delimiter=' ', quotechar='|', quoting=csv.QUOTE_MINIMAL) for w, c in p.items(): cwriter.writerow(w + c)
Here, p
is a dictionary, w
and c
both are strings.
When I try to write to the file it reports the error:
ValueError: I/O operation on closed file.
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Answer
Indent correctly; your for
statement should be inside the with
block:
import csv with open('v.csv', 'w') as csvfile: cwriter = csv.writer(csvfile, delimiter=' ', quotechar='|', quoting=csv.QUOTE_MINIMAL) for w, c in p.items(): cwriter.writerow(w + c)
Outside the with
block, the file is closed.
>>> with open('/tmp/1', 'w') as f: ... print(f.closed) ... False >>> print(f.closed) True