问pycharm怎么解决list index of range？

def load_movies(self, filePath):
    """
    Load a csv file into movie objects in the list.
    """
    with open(filePath, 'r') as file:
        reader = csv.reader(file)
        for row in reader:
            # convert the years into number
            row[1] = int(row[1])
            # convert the status into is_watched
            if row[3] == "w":
                row[3] = True
            else:
                row[3] = False
            # append new movie info
            self.movies.append(Movie(*row))