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python提取log文件内容并画出图表

yipeiwu_com6年前 (2020-03-06)Python基础

之前在excel里面分析log数据，简直日了*了。现在用python在处理日志数据.

主要涉及 matplotlib，open和循环的使用。

日志内容大致如下

2016-10-21 21:07:59,787 [7 MainWindowForm]INFO: update time 136.6314
2016-10-21 21:07:59,908 [7 KinectServer]INFO: lClientSockets[0] elapsed time 16.
2016-10-21 21:07:59,918 [7 KinectServer]INFO: lClientSockets[1] elapsed time 107.
2016-10-21 21:07:59,929 [7 MainWindowForm]INFO: update time 135.1311
2016-10-21 21:08:00,039 [7 KinectServer]INFO: lClientSockets[0] elapsed time 14.
2016-10-21 21:08:00,045 [7 KinectServer]INFO: lClientSockets[1] elapsed time 103.
2016-10-21 21:08:00,053 [7 MainWindowForm]INFO: update time 118.1132

python处理代码

import matplotlib.pyplot as plt

input = open('serverlog.txt', 'r')

rangeUpdateTime = [0.0]

for line in input:
  line = line.split()
  if 'update' in line:
    rangeUpdateTime.append(float(line[-1]))

plt.figure('frame time')
plt.subplot(211)
plt.plot(rangeUpdateTime, '.r',)
plt.grid(True)
plt.subplot(212)
plt.plot(rangeUpdateTime)
plt.grid(True)
plt.show()

结果