ValueError : I/O operation on closed file
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