Python generators and piping demo

output.txt

times2 start
range start
yielding 0
multiplying 0 by 2
yielding 1
multiplying 1 by 2
yielding 2
multiplying 2 by 2
yielding 3
multiplying 3 by 2
yielding 4
multiplying 4 by 2
range done
times2 done

streaming.py

from cytoolz import pipe

def myrange(m):
    print("range start")
    for i in range(m):
        print("yielding %i" % i)
        yield i
    print("range done")

def times2(it):
    print("times2 start")
    for i in it:
        print("multiplying %i by 2" % i)
        yield i * 2
    print ("times2 done")

if __name__ == '__main__':
    pipe(5, myrange, times2, list)