from mapnik import Map, Layer
proj4 = '+proj=tmerc +lat_0=0 +lon_0=7.3 +k=0.999 +x_0=1000000 +y_0=1000000 +ellps=WGS84 +datum=WGS84 +units=m +no_defs'
m = Map(256,256,proj4)
lyr = Layer('Name',proj4)