from matplotlib import pyplot as plt

x = range(12)
y = [3000, 3005, 3010, 2900, 2950, 3050, 3000, 3100, 2980, 2980, 2920, 3010]
plt.plot(x, y)


plt.axis([0,12,2900,3100])

plt.show()
from matplotlib import pyplot as plt

x = range(12)
y = [3000, 3005, 3010, 2900, 2950, 3050, 3000, 3100, 2980, 2980, 2920, 3010]
plt.plot(x, y)


plt.axis([0,12,2900,3100])

plt.show()