Python ---chart

# -*- coding:utf-8 -*-
import random
import matplotlib.pyplot as plt
from pylab import * 
import os                

import pandas as pd
import numpy as np
import xlsxwriter
t_indx= pd.date_range('11/9/2018 00:00:00',periods=100,freq='s',normalize=True) 
t= []
for i in t_indx:
    t.append(str(i))
    

len_num = len(t_indx)
print"len: ", len_num

cpu=[]
mem=[]
random1 = np.random.RandomState(100)
random2 = np.random.RandomState(50)
for j in range(100):
    cpu.append(round(random1.uniform(0, 400.0),2))
    mem.append(round(random2.uniform(0, 100.0),2))


#for k in cpu:
#    print "CPU: ", k
#    
#for l in mem:
#    print "MEM: ", l

 
if os.path.isfile("data.txt"):
    os.remove("data.txt") 
else:
    #write to file
    f = open('data.txt','a')
    for m in range(100):
        f.write(t[m][11:])
        f.write(' ')
        f.write(str(cpu[m]))
        f.write(' ')
        f.write(str(mem[m]))
        f.write('
')
    f.close()

data1=[]
data2=[]
data3=[]    


with open('data.txt', 'r') as file_to_read:
    while True:
        lines = file_to_read.readline()
        if not lines:
            break
            pass
        data1.append(lines.split(' ',2)[0])
        data2.append(float(lines.split(' ',2)[1]))
        data3.append(float(lines.split(' ',2)[2]))


#for k in data1:
#    print k
#for k in data2:
#    print k
for k in data3:
    print k



data=[data1,data2,data3]

mpl.rcParams['font.sans-serif'] = ['SimHei']
times=data1
x = range(len(times))
y = data2
y1 = data3
plt.plot(x, y, marker='o', mec='r', mfc='w',label=u'CPU曲线图')
plt.plot(x, y1, marker='*', ms=10,label=u'memory曲线图')
plt.legend()  # 让图例生效
plt.xticks(x, times, rotation=45)
plt.margins(0)
plt.subplots_adjust(bottom=0.15)
plt.xlabel(u"time(s)") #X轴标签
plt.ylabel("%") #Y轴标签
plt.title("perfomance") #标题

plt.show()

生成的图：