Python Csv Dictwriter
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To write a dictionary of list to CSV files the necessary functions are csv writer csv writerows This method writes all elements in rows an iterable of row objects as described above to the writer s file object Here we are going to create a csv file test csv and store it in a variable as outfile 5 votes. def write_file(output_directory, table_name, schema, values): file_name = os.path.join(output_directory, '%s.csv' % (table_name,)) with open(file_name, 'w') as write_file: writer = csv.DictWriter(write_file, fieldnames=schema) writer.writeheader() for value in values: writer.writerow(dict(zip(schema, value)))
Python Csv DictwriterSimple example of using the writeheader () method now available in 2.7 / 3.2: from collections import OrderedDict ordered_fieldnames = OrderedDict ( [ ('field1',None), ('field2',None)]) with open (outfile,'wb') as fou: dw = csv.DictWriter (fou, delimiter='\t', fieldnames=ordered_fieldnames) dw.writeheader () # continue on to write data. 2 Answers You are using DictWriter writerows which expects a list of dicts not a dict You want DictWriter writerow to write a single row You will also want to use DictWriter writeheader if you want a header for you csv file You also might want to check out the with statement for opening files