0.00   -10.742
1.00   -17.75391
4.00   -19.62891
20.00  -20.7641
23.00  -34.2300
50.00  -50.000
65.88   -22.5000
78.00   -30.000
86.00   -37.7900
90.00   -45.00000

0.00   -10.742
1.00   -17.75391
4.00   -19.62891
20.00  -20.7641
23.00  -34.2300
50.00  -50.000

65.88   -22.5000
78.00   -30.000
86.00   -37.7900
90.00   -45.00000

import matplotlib.pyplot as plt
import sys
import numpy as np
from matplotlib import style
fileName=input("Enter Input File Name: ")
f1=open(fileName,'r')
style.use('ggplot')
x1,y1=np.loadtxt(fileName,unpack=True, usecols=(0,1));
plt.plot(x1,y1,'r')
plt.plot
plt.title('example1')
plt.xlabel('Time')
plt.ylabel('Values')
plt.grid(True,color='k')
plt.show()