十六章CSV

ax.set_title等函数中的标题应该使用英文单引号而不是双引号，否则继续输入中文时程序会误以为汉字字体错误。

RuntimeWarning: Glyph 24180 missing from current font. font.set_text(s, 0.0, flags=flags)

其他部分程序运行比较成功

import csv
import matplotlib.pyplot as plt
import matplotlib
from datetime import datetime
filename='D:\\pycharmprograms\\codes\\chapter_16\\the_csv_file_format\\data\\sitka_weather_2018_simple.csv'
with open(filename) as f:
    reader=csv.reader(f)
    header_row=next(reader)

    dates,highs,lows=[],[],[]
    for row in reader:
        high=int(row[5])
        current_date=datetime.strptime(row[2],'%Y-%m-%d')
        low=int(row[6])
        highs.append(high)
        dates.append(current_date)
        lows.append(low)

plt.style.use('seaborn')
fig,ax=plt.subplots()
matplotlib.rcParams['font.sans-serif'] = ['KaiTi']
ax.plot(dates,highs,c='red',alpha=0.5)
ax.plot(dates,lows,c='green',alpha=0.5)
ax.fill_between(dates,highs,lows,facecolor='blue',alpha=0.1)

ax.set_title('2018年最高温',fontsize=24)
ax.set_xlabel('',fontsize=16)
fig.autofmt_xdate()
ax.set_ylabel('温度F',fontsize=16)
ax.tick_params(axis='both',which='major',labelsize=16)

plt.show()

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