Initial data commit

Task/Wireworld/Python/wireworld.py

@@ -0,0 +1,70 @@
+'''
+Wireworld implementation.
+'''
+
+from io import StringIO
+from collections import namedtuple
+from pprint import pprint as pp
+import copy
+
+WW = namedtuple('WW', 'world, w, h')
+head, tail, conductor, empty = allstates = 'Ht. '
+
+
+infile = StringIO('''\
+tH.........
+.   .
+   ...
+.   .
+Ht.. ......\
+''')
+
+def readfile(f):
+    '''file > initial world configuration'''
+    world  = [row.rstrip('\r\n') for row in f]
+    height = len(world)
+    width  = max(len(row) for row in world)
+    # fill right and frame in empty cells
+    nonrow = [ " %*s " % (-width, "") ]
+    world  = nonrow + \
+               [ " %*s " % (-width, row) for row in world ] + \
+               nonrow
+    world = [list(row) for row in world]
+    return WW(world, width, height)
+
+def newcell(currentworld, x, y):
+    istate = currentworld[y][x]
+    assert istate in allstates, 'Wireworld cell set to unknown value "%s"' % istate
+    if istate == head:
+        ostate = tail
+    elif istate == tail:
+        ostate = conductor
+    elif istate == empty:
+        ostate = empty
+    else: # istate == conductor
+        n = sum( currentworld[y+dy][x+dx] == head
+                 for dx,dy in ( (-1,-1), (-1,+0), (-1,+1),
+                                (+0,-1),          (+0,+1),
+                                (+1,-1), (+1,+0), (+1,+1) ) )
+        ostate = head if 1 <= n <= 2 else conductor
+    return ostate
+
+def nextgen(ww):
+    'compute next generation of wireworld'
+    world, width, height = ww
+    newworld = copy.deepcopy(world)
+    for x in range(1, width+1):
+        for y in range(1, height+1):
+            newworld[y][x] = newcell(world, x, y)
+    return WW(newworld, width, height)
+
+def world2string(ww):
+    return '\n'.join( ''.join(row[1:-1]).rstrip() for row in ww.world[1:-1] )
+
+ww = readfile(infile)
+infile.close()
+
+for gen in range(10):
+    print ( ("\n%3i " % gen) + '=' * (ww.w-4) + '\n' )
+    print ( world2string(ww) )
+    ww = nextgen(ww)