from mapnik import Map, Layer
proj4 = '+proj=stere +lat_0=-90 +lat_ts=-66.99999999999993 +lon_0=139.9999999999999 +k=1 +x_0=300000 +y_0=200000 +ellps=intl +towgs84=365.0,194.0,166.0,0.0,0.0,0.0,0.0 +units=m +no_defs'
m = Map(256,256,proj4)
lyr = Layer('Name',proj4)