import csv from datetime import datetime from matplotlib import pyplot as plt # 从文件中获取每天的最高温度 filename = 'sitka_weather_07-2014.csv' with open(filename) as f: reader = csv.reader(f) # next(reader)函数是返回reader阅读器的下一行,目前只调用了一次,所以是头行 header_row = next(reader) # 打印头行,header_row它是一个列表 # print(header_row) # enumerate() 获取每个元素的索引及其值 for index, column_header in enumerate(header_row): print(index, column_header) # 第二列每天的最高温度 dates, highs = [], [] for row in reader: current_date = datetime.strptime(row[0], '%Y-%m-%d') print(current_date) dates.append(current_date) high = int(row[1]) highs.append(high) print(dates) print(highs) # 根据数据绘制图形 fig = plt.figure(dpi=128, figsize=(10, 6)) plt.plot(dates, highs, c='red') # 设置图形的格式 plt.title("Daily high temperatures, July 2014", fontsize=24) plt.xlabel("", fontsize=16) # 绘制斜的日期标签 fig.autofmt_xdate() plt.ylabel("Temperature (F)", fontsize=16) plt.tick_params(axis='both', which='major', labelsize=16) plt.show()