Time spent looking at exponential graphs (log scale)

expograph.py

import matplotlib.pyplot as plt
import numpy as np
import pandas as pd
import matplotlib.dates as md

t0 = pd.Timestamp('2020-01-01')
x = pd.date_range('2020-01-01', '2020-03-31')
y = np.exp(13.815510558/90 * (x-t0).days)
xt = [pd.Timestamp('2020-01-15'),pd.Timestamp('2020-02-15'),pd.Timestamp('2020-03-15')]

with plt.xkcd():
    plt.figure()
    a = plt.gca()
    a.xaxis.set_major_formatter(md.DateFormatter('%B'))
    plt.title("Time spent looking at\nexponential graphs (log scale)")
    plt.yscale('log')
    plt.xticks(xt)
    plt.plot(x,y)
    plt.show()