time = []
co2 = []
+ temp = []
startdate = date(2020, 10, 22)
for row in reader:
dt = parsedatetime(row[0], startdate)
dt += timedelta(days=1)
time.append(dt)
co2.append(int(row[2]))
+ temp.append(int(row[3]))
plt.plot(time, co2, c = 'red')
plt.title('CO₂')
plt.xlabel('time')
plt.ylabel('ppm')
plt.tick_params(axis = 'both', which = 'major')
+ plt.gca().twinx()
+ plt.plot(time, temp, c = 'blue')
plt.show()