source: doc/papers/llheap/examples/Format.py@ b08ab18

def Format():
        try:
                while True:
                        for g in range( 5 ):    # groups of 5 blocks
                                for b in range( 4 ): # blocks of 4 characters
                                        while True:
                                                ch = (yield) # receive from send
                                                if '\n' not in ch:
                                                        break
                                        print( ch, end='' ) # receive from send
                                print( '  ', end='' ) # block separator
                        print()                                 # group separator
        except GeneratorExit:                   # destructor
                if g != 0 | b != 0:                     # special case
                        print()

input = "abcdefghijklmnop\nqrstuvwx\nyzxxxxxxxxxxxxxx\n"

fmt = Format()
next( fmt )                                                     # prime generator
for i in input:
        fmt.send( i );                          # send to yield

# Local Variables: #
# tab-width: 4 #
# compile-command: "python3.7 Format.py" #
# End: #