from mapnik import Map, Layer
proj4 = '+proj=tmerc +lat_0=0 +lon_0=24 +k=0.9996 +x_0=500000 +y_0=-2000000 +ellps=GRS80 +towgs84=3.567,1.329,3.026,-0.17,-0.06,-0.151,-0.294 +units=m +no_defs'
m = Map(256,256,proj4)
lyr = Layer('Name',proj4)