Hello Raspberry Pi

Similar to the previous example "Display Raspberry Pi CPU temperature graphically, using Python 2 with Matplotlib and drawnow", but use library of matplotlib.pyplot only, no drawnow.

import os
import matplotlib.pyplot as plt
tempC = []
plt.ion()
cnt=0
def plotNow():
 plt.clf()
 plt.ylim(20,80)
 plt.title('Raspberry Pi core temperture')
 plt.grid(True)
 plt.ylabel('Temp C')
 plt.plot(tempC, 'rx-', label='Degrees C')
 plt.legend(loc='upper right')
 plt.plot(tempC)
 plt.show()
#pre-load dummy data
for i in range(0,26):
 tempC.append(0)
 
while True:
 ostemp = os.popen('vcgencmd measure_temp').readline()
 temp = (ostemp.replace("temp=", "").replace("'C\n", ""))
 print(temp)
 tempC.append(temp)
 tempC.pop(0)
 plotNow()
 plt.pause(.5)