Python script to plot color-coded buildings in the game Castle Age

ca_bldgplotter.py

from PIL import Image

f = open("buildinglist.csv")

colordict = {"Castle":(255,0,0),
             "Gold Mine":(255,255,0),
             "Iron Mine":(192,192,192),
             "Sawmill":(128,64,0),
             "Quarry":(64,64,64),
             "Forge":(255,0,255),
             "Market-Place":(0,255,0),
             "Storehouse":(0,0,255),
             "Farm":(0,255,255),
             "Town Hall":(255,255,255)}

camap = []
for x in range(501):
    camap.append([(0,0,0)]*501)

for e in f.read().split("\n"):
    z = e.split(",")
    if len(z)>5:
        if z[4] == " no relatio":
            z[4] = z[5]
        camap[250-int(z[2])][250+int(z[1])]=colordict[z[4]]

res = []
for e in camap:
    res += e

i = Image.new("RGB", (501,501))
i.putdata(res)
i.save("ca_bldgmap.png", "PNG")