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pycellau2d.py
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pycellau2d.py
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import random
import time
import getopt
import sys
class Cell:
off = "#"
on = "O"
def __init__(self, location, state=off):
self.l = location
self.s = state
def update(self, model):
return True
def copy(self):
return type(self)(self.l, self.s)
def __str__(self):
return self.s
def __repr__(self):
return str(self)
class TrafficCell(Cell):
off = "-"
on = "O"
def update(self, model):
if self.s == self.on and self.l == model.l-1:
self.s = self.off
elif self.s == self.off and model.getTape()[self.l-1].s == self.on and self.l != 0:
self.s = self.on
elif self.s == self.on and model.getTape()[self.l+1].s == self.off:
self.s = self.off
class LengthError(Exception):
pass
class Model:
def __init__(self, length, cell_type, num_cells=0, seed=None):
if num_cells > length:
raise LengthError("Error: Your number of cells is greater than the length of your tape")
self.l = length
self.c = []
self.t = cell_type
if seed:
if len(seed) != length :
raise LengthError("Error: Your seed does not match the details entered")
else:
for i in range(length):
self.c.append(cell_type(i, seed[i]))
else:
for i in range(length):
cell = cell_type(i,cell_type.off)
self.c.append(cell.copy())
for i in range(num_cells):
cell = self.c[random.randint(0,length-1)]
while cell.s != cell_type.off:
cell = self.c[random.randint(0,length-1)]
cell.s = cell_type.on
self.i = [None for i in range(self.l)]
for i in self.c:
self.i[i.l] = i.copy()
self.generate_list()
def show(self):
output = ["-" for i in range(self.l)]
for i in self.c:
output[i.l] = i.s
s = ""
for i in output:
s += i
print(s)
def getTape(self):
return self.i
def generate_list(self):
self.p = []
for i in self.i:
self.p.append(i.copy())
self.i = [None for i in range(self.l)]
for i in self.c:
self.i[i.l] = i.copy()
def update(self):
for i in self.c:
i.update(self)
self.generate_list()
for i in range(len(self.c)):
if str(self.p[i]) != str(self.c[i]):
return True
return False
def usage():
print()
print("Cellular Automata 2D Usage")
print("-h --help: Displays this help screen")
print("------------------------------------")
print("Essential Parameters")
print("-l --length: The length of the string.")
print("-n --num: Number of initial cells")
print("-c --cell: Name of the cell class - must be a subclass of Cell")
print("Optional Parameters")
print("-d --delay: Delay between each iteration, for display purposes. Default 0.1s")
print()
def str_to_class(str):
return getattr(sys.modules[__name__], str)
def run_model(model, delay):
model.show()
while model.update():
model.show()
time.sleep(delay)
def run(length, cell, seed, delay=0.1):
new_model = Model(length, cell, seed=seed)
run_model(new_model, delay)
def main():
ins = ["-h","-l","-c","-n","-d"]
insWord = ["--help", "--length", "--cell", "--num", "--delay"]
opts = []
used = []
try:
for i in range(0,len(sys.argv[1:]),2):
if (sys.argv[1+i] in ins or sys.argv[1+i] in insWord) and sys.argv[1+i] not in used:
opts.append([sys.argv[1+i],sys.argv[2+i]])
used.append(sys.argv[1+i])
else:
raise ValueError("Parameter error, either parameter does not exist or has been repeated: "+str(sys.argv[1+i]))
except ValueError as err:
print(err)
usage()
sys.exit()
length, num, cell, delay = None, None, None, 0.1
for o, a in opts:
if o in ("-h","--help"):
usage()
sys.exit()
elif o in ("-l","--length"):
length = int(a)
elif o in ("-n","--num"):
num = int(a)
elif o in ("-c","--cell"):
cell = globals()[a]
elif o in ("-d","--delay"):
delay = float(a)
else:
assert False,"Unhandled Option"
if not (length and num and cell):
usage()
else:
new_model = Model(length, cell, num)
run_model(new_model, delay)
if __name__ == "__main__":
main()