Not sure what I was doing wrong, it seems to work now. Vincent Davis 720-301-3003
On Sat, May 9, 2015 at 4:46 PM, Vincent Davis <vinc...@vincentdavis.net> wrote: > I am reading a file with Dictreader and writing a new file. I want use the > fieldnames in the Dictwriter from the reader. See below How should I be > doing this? > > See how I am using reader.fieldnames in the the Dictwriter. I get an error > (below) > > with open(readfile, 'r', encoding='utf-8', errors='ignore', newline='') as > csvread: > reader = DictReader(csvread) > with open(writefile, 'w') as csvwrite: > writer = DictWriter(csvwrite, delimiter=',', > fieldnames=reader.fieldnames) > for line in reader: > pass > > ValueError Traceback (most recent call > last)<ipython-input-13-0dac622bb8a9> in <module>()----> 1 reader.fieldnames() > /Users/vmd/anaconda/envs/py34/lib/python3.4/csv.py in fieldnames(self) 94 > if self._fieldnames is None: 95 try:---> 96 > self._fieldnames = next(self.reader) 97 except > StopIteration: 98 pass > ValueError: I/O operation on closed file. > > > > Thanks > Vincent > Davis > >
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