python实现从文件中读取数据并绘制成 x y 轴图形的方法

如下所示：

import matplotlib.pyplot as plt
import numpy as np

def readfile(filename):
dataList = []
dataNum = 0
with open(filename,'r') as f:
 for line in f.readlines():
  linestr = line.strip('\n')
  if len(linestr) < 8 and len(linestr) >1:
   dataList.append(float(linestr))
   dataNum += 1
return dataList, dataNum

y, range = readfile("./session.log")
# print y
print "range=％d" ％ (range)  
x = np.linspace(0, 1, range)
# plt.plot(x, y, 'r-o')
plt.plot(x, y)
plt.show()

数据格式：

0.8960
0.9456
0.9069
0.9128
0.9306
1.0186
1.0327
0.9835
0.9438
0.9807
0.9949
1.0737
1.0842
1.0445
1.0609
1.0664
0.9748
1.0427
1.0983
1.0814
1.1083
1.1051

图形：

来源：https://blog.csdn.net/zwl1584671413/article/details/79204085