Use ax.yaxis.tick_right()
for example:
from matplotlib import pyplot as plt
f = plt.figure()
ax = f.add_subplot(111)
ax.yaxis.tick_right()
plt.plot([2,3,4,5])
plt.show()

Use ax.yaxis.tick_right()
for example:
from matplotlib import pyplot as plt
f = plt.figure()
ax = f.add_subplot(111)
ax.yaxis.tick_right()
plt.plot([2,3,4,5])
plt.show()
