hbutils.reflection.iter

nested_for

hbutils.reflection.iter.nested_for(*iters: Iterable[_ItemType]) → Iterator[Tuple[_ItemType, …]]

Nested for based on several iterators.

Parameters:

iters – Iterators to build this nested for loop.

Returns:

Nested for loop iteration.

Examples::

>>> from hbutils.reflection import nested_for
>>> for a, r, b in nested_for(
...         range(1, 3),
...         ['a', 'b'],
...         map(lambda x: x ** 2, range(1, 4))
... ):
>>>     print(a, r, b)
1 a 1
1 a 4
1 a 9
1 b 1
1 b 4
1 b 9
2 a 1
2 a 4
2 a 9
2 b 1
2 b 4
2 b 9

progressive_for

hbutils.reflection.iter.progressive_for(iterable: Iterable[_ItemType], n: int, offset: int = 1) → Iterator[Tuple[_ItemType, …]]

Progressive for based on one given iterable.

Parameters:

• iterable – Iterable object for this loop.

• n – Depth of this loop.

• offset – Offset of this loop, default is 1 which means the first value in the next level will be the one after the above level.

Returns:

Progressive for loop iteration.

Examples::

>>> from hbutils.reflection import progressive_for
>>> for a, b in progressive_for(range(4), 2):
...     print(a, b)
0 1
0 2
0 3
1 2
1 3
2 3
>>> for a, b in progressive_for(range(4), 2, 0):
...     print(a, b)
0 0
0 1
0 2
0 3
1 1
1 2
1 3
2 2
2 3
3 3
>>> for a, b, c in progressive_for(range(5), 3):
...     print(a, b, c)
0 1 2
0 1 3
0 1 4
0 2 3
0 2 4
0 3 4
1 2 3
1 2 4
1 3 4
2 3 4
>>> for a, b, c in progressive_for(range(5), 3, 2):
...     print(a, b, c)
0 2 4