[python] How to equalize the scales of x-axis and y-axis in Python matplotlib?

I wish to draw lines on a square graph.

The scales of x-axis and y-axis should be the same.

e.g. x ranges from 0 to 10 and it is 10cm on the screen. y has to also range from 0 to 10 and has to be also 10 cm.

The square shape has to be maintained, even if I mess around with the window size.

Currently, my graph scales together with the window size.

How may I achieve this?

UPDATE:

I tried the following, but it did not work.

plt.xlim(-3, 3)
plt.ylim(-3, 3)
plt.axis('equal')

plt.axis('scaled')

works well for me.

Try something like:

import pylab as p
p.plot(x,y)
p.axis('equal')
p.show()

See the documentation on plt.axis(). This:

plt.axis('equal')

doesn't work because it changes the limits of the axis to make circles appear circular. What you want is:

plt.axis('square')

This creates a square plot with equal axes.