matplotlib: left yaxis and right yaxis to have different units

Question

I'm plotting curves in Kelvin. I would like to have the left yaxis to show units in Kelvin and the right yaxis to show them in Celsius, and both rounded to the closest integer (so the ticks are not aligned, as TempK=TempC+273.15)

fig=plt.figure
figure=fig.add_subplot(111)
figure.plot(xpos, tos, color='blue')

I should not use twinx() as it allows superimposing curves with two different scales, which is not my case (only the right axis has to be changed, not the curves).

Answer 1

I found the following solution:

fig=plt.figure
figure=fig.add_subplot(111)
figure.plot(xpos, tos, color='blue')
... plot other curves if necessary
... and once all data are plot, one can create a new axis

y1, y2=figure.get_ylim()
x1, x2=figure.get_xlim()
ax2=figure.twinx()
ax2.set_ylim(y1-273.15, y2-273.15)
ax2.set_yticks( range(int(y1-273.15), int(y2-273.15), 2) )
ax2.set_ylabel('Celsius')
ax2.set_xlim(x1, x2)
figure.set_ylabel('Surface Temperature (K)')

Do not forget to set the twinx axis xaxis!