Repeatable

Python package to create generator-like objects that can be iterated over more than once.

Repeatable also provides itertools alternatives that handle thase iterables with far better memory efficiency, even accepting infinite iterables.

Installation

pip install repeatable

Usage

Creating a repeatable Fibonacci-number generator:

from repeatable import repeatable

@repeatable
def fibonacci(max_value = 5):
    a, b, = 0, 1
    while a <= max_value:
        yield a
        a, b = b, a + b

repeatable_fibonacci = fibonacci()

for x in repeatable_fibonacci:
    print(x)

repeatable_fibonacci.restart()

for y in repeatable_fibonacci:
    print(y)

"""
0
1
1
2
3
5
0
1
1
2
3
5
"""

You can also use repeatable itertools on infinite generators:

from repeatable import repeatable, product

@repeatable
def fibonacci():
    a, b = 0, 1
    while True:
        yield a
        a, b = b, a + b

repeatable_fibonacci = fibonacci()

for p in product(repeatable_fibonacci, range(2)):
    print(p)

"""
(0, 0)
(0, 1)
(1, 0)
(1, 1)
(1, 0)
(1, 1)
(2, 0)
(2, 1)
(3, 0)
(3, 1)
(5, 0)
(5, 1)
...
"""