# This program genereates very simple one dimensional cellular automata
# URL: http://www.stephenwolfram.com/publications/articles/ca/83-cellular/2/text.html
# ALGORITHM:
# Basic Initial List
# Loop:
# Update the List
# Print current List
# End
size = 50
list = [0]*size # creates list with all 0's
list[size/2] = 1 # sets middle element in list to 1
def update(list):
'''This function updates list based on rule ( left XOR right here )'''
temp = len(list)*[0]
n = len(list)
for i in range(1,n-1):
temp[i] = list[i-1]^list[i+1] # list[i] = list[i-1] XOR list[i+1
return temp
def p(list):
'''This function prints list with 'A' for 1 and ' ' for 0 value.'''
print ''
for each in list:
if each ==1:
print 'A',
else:
print ' ',
if __name__=='__main__':
'''This program generates snoflake pattern'''
for i in range(size/2):
p(list)
list = update(list)
