绘制气温图表

import csv

from matplotlib import pyplot as plt
from datetime import datetime

filename = "death_valley_2014.csv"
with open(filename) as f:
    reader = csv.reader(f)
    header_row = next(reader)
    for index,column_header in enumerate(header_row):
        print(index,column_header)

    dates = []
    highs = []
    lows = []
    for row in reader:
        try:
            current_date = datetime.strptime(row[0],"%Y-%m-%d")
            high = int(row[1])
            low = int(row[3])
        except ValueError:
            print(current_date.strftime('%Y-%m-%d'), 'missing data')
            """.strftime('%Y-%m-%d') 函数可以将年-月-日0:0:0改为年-月-日"""
        else:
            dates.append(current_date) 
            highs.append(high)
            lows.append(low)
    
    #print(highs)

fig = plt.figure(dpi = 128,figsize=(10,8))
plt.plot(dates,highs,c='red',alpha = 0.5)
plt.plot(dates,lows,c='blue',alpha = 0.5)
plt.fill_between(dates,highs,lows,facecolor='blue',alpha = 0.1)

title = "Daily high and low temperatures - 2014\nDeath_Valley,CA"
plt.title(title,fontsize= 24)
plt.xlabel('',fontsize = 16)
fig.autofmt_xdate()
plt.ylabel('Temperature(F)',fontsize = 16)
plt.tick_params(axis='both',which='major',labelsize = 16)
plt.show()