import numpy as np
import matplotlib.pyplot as plt
import matplotlib
import matplotlib.pyplot as plt
matplotlib.rcParams.update({'font.size':24 }) # 改变所有字体大小，改变其他性质类似
plt.figure(figsize=(12,8))
x = [i for i in range(0,120)]
y1 = df_17_in_out['in']
y2 = df_17_in_out['out']
plt.plot(x, y1, label='to')
plt.plot(x, y2, label='from')
#将x轴置空
plt.xticks(x,())
#用需要的数据将x轴替换为需要的数据
plt.xticks((0,31,76,101,119), ('Dec.01','Jan.01','Feb.16','Mar.13','Mar.31'))
# 垂直填充
plt.axvspan(0,31, facecolor='#C0C0C0', alpha=0.5)
plt.axvspan(31,76, facecolor='#FFFFFF', alpha=0.5)
plt.axvspan(76,101, facecolor='#C0C0C0', alpha=0.5)
plt.axvspan(101,119, facecolor='#FFFFFF', alpha=0.5)
plt.ylabel('and from wuhan (%)')
plt.legend()
plt.savefig('./01.pdf')
plt.show()
