XML : elementTree is not opening and parsing my xml file

  import argparse  import xml.etree.ElementTree as cars_Etree    # elementTree not reading xml file properly    if __name__ == '__main__':        parser = argparse.ArgumentParser()        parser.add_argument(          dest='file_name',          action='store',          help='File name',          metavar='FILE'      )      parser.add_argument(          'car_make', help='car name')        args = parser.parse_args()        with open(args.file_name, 'r') as cars_file:          vehicles = cars_Etree.parse(cars_file)          cars = vehicles.getroot()            for make in cars.findall(args.car_make):              name = make.get('name')              if name != args.car_make:                  cars.remove(make)            with open(args.file_name, 'w') as cars_file:              vehicles.write(cars_file)    

Error:

  Traceback (most recent call last):    File "/Users/benbitdiddle/PycharmProjects/VehicleFilter/FilterTest.py", line 23, in <module>      vehicles = cars_Etree.parse(cars_file)    File "/Applications/anaconda/lib/python3.5/xml/etree/ElementTree.py", line 1184, in parse      tree.parse(source, parser)    File "/Applications/anaconda/lib/python3.5/xml/etree/ElementTree.py", line 596, in parse      self._root = parser._parse_whole(source)  xml.etree.ElementTree.ParseError: syntax error: line 1, column 0