matplotlib.pyplot绘图显示控制方法

import numpy as np
import matplotlib.pyplot as plt  
x = np.arange(0, 2*np.pi, .001)
y = np.sin(2 * np.pi * x)

plt.clf()
plt.plot(x, y)
l = plt.axhline(linewidth=1, color='black')
l = plt.axvline(linewidth=1, color='black')
plt.show()

import numpy as np
import matplotlib
matplotlib.use('agg')

import matplotlib.pyplot as plt  # matplotlib.use('agg')必须在本句执行前运行
(后续代码略)

import numpy as np
import pandas as pd
%matplotlib inline
(后续代码略)