Using *my_iterable when calling a function forces the Python interpreter to eagerly iterate over my_iterable

eager_star.py

>>> def prange(n):
...     for i in range(n):
...         print('->', i)
...         yield i
...
>>> def f(a, b, c):
...     print((a, b, c))
...
>>> f(*prange(3))
-> 0
-> 1
-> 2
(0, 1, 2)
>>> def g(*args):
...     print(args)
...
>>> g(*prange(3))
-> 0
-> 1
-> 2
(0, 1, 2)
>>>