[GRASS-user] temporary files in a Python Script with mapcalc

Greetings

I'm doing some image processing python script with requires the calculation of many "intermediate" rasters. for example:
x=a+b+c
alpha=x-(b^gama)
y=c*alpha+b

One possibility is integrating all of it in one expression but I'm afraid of having some "minor" error in expression so I prefer to separate the calculation.
My question is: how can I use temporary files to store x and alpha value? Or I should create normal rasters and, at the end, delete them?

Thanks
Antonio

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