def write_headers(self, filename_code):
filename = self.filenames[filename_code]
with open(filename, 'a+b') as csvfile:
resultados = UnicodeWriter(csvfile, delimiter=',', quotechar='=', quoting=csv.QUOTE_MINIMAL)
resultados.writerow(self.headers[filename_code])
self.headers_written[filename_code] = True
csvfile.close()
