I have a line graph (plotted using plot(x,y) funstion) plotted in a window, then, would it be possible to Plot a bar graph in/on the same window for visual analysis of the data that was plotted?
Yes, you will need to work a little harder and use the axes of the plot:
import numpy as np
import matplotlib.pyplot as plt
x= np.arange(5)
y1=np.arange(5)
y2 = np.ones(5)
fig = plt.figure()
ax = fig.add_subplot(111)
ax.plot(x,y1)
ax.bar(x,y2)
plt.show()