求助！！自学，python读取csv文件失败，python编程从入门到实践第16章

Python编程从入门到实践，第16章，下载数据 import csv from datetime import datetime from matplotlib import pyplot as plt 从文件中获取日期和最高气温 filename = ‘sitka_weather_07-2014.csv’ with open(filename) as f: reader = csv.reader(f) header_row = next(reader) dates,highs = [],[] for row in reader: current_date = datetime.st