from mapnik import Map, Layer
proj4 = '+proj=lcc +lat_1=29.7 +lat_0=29.7 +lon_0=-5.4 +k_0=0.9996155960000001 +x_0=500000 +y_0=300000 +a=6378249.2 +b=6356515 +towgs84=31,146,47,0,0,0,0 +units=m +no_defs'
m = Map(256,256,proj4)
lyr = Layer('Name',proj4)