Creating Generators

General Usage
14

Suppose you have this in python

# aka riemann serie
def p_serie(p):
    assert(p>0)
    s = 0
    n = 1
    while True:
        s += 1.0/pow(n,p)
        yield s
        n += 1

then run

itr = p_serie(2)
[next(itr) for _ in range(10)]

that output (reformatted)

[ 1.0,
  1.25,
  1.3611111111111112,
  1.4236111111111112,
  1.4636111111111112,
  1.4913888888888889,
  1.511797052154195,
  1.527422052154195,
  1.5397677311665408,
  1.5497677311665408
]

(1/2)