I am trying to count the number of lines in a file and insert into the file but getting the error message "TypeError: must be string or read-only character buffer, not int", Could you please help me how to correct this?
here is the code
lines1 = sum(1 for line in open('C:/test1.txt'))
wfile = open('C:/test1.txt'', 'a')
wfile.write(str(lines1).zfill(9))
wfile.close()
Thanks.
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