monty.itertools module¶
Additional tools for iteration.
- chunks(items, n)[source]¶
Yield successive n-sized chunks from a list-like object.
>>> import pprint >>> pprint.pprint(list(chunks(range(1, 25), 10))) [(1, 2, 3, 4, 5, 6, 7, 8, 9, 10), (11, 12, 13, 14, 15, 16, 17, 18, 19, 20), (21, 22, 23, 24)]
- ilotri(items, diago=True, with_inds=False)[source]¶
A generator that yields the lower triangle of the matrix (items x items)
- Parameters
items – Iterable object with elements [e0, e1, …]
diago – False if diagonal matrix elements should be excluded
with_inds – If True, (i,j) (e_i, e_j) is returned else (e_i, e_j)
>>> for (ij, mate) in ilotri([0,1], with_inds=True): ... print("ij:", ij, "mate:", mate) ij: (0, 0) mate: (0, 0) ij: (1, 0) mate: (1, 0) ij: (1, 1) mate: (1, 1)
- iterator_from_slice(s)[source]¶
Constructs an iterator given a slice object s.
Note
The function returns an infinite iterator if s.stop is None
- iuptri(items, diago=True, with_inds=False)[source]¶
A generator that yields the upper triangle of the matrix (items x items)
- Parameters
items – Iterable object with elements [e0, e1, …]
diago – False if diagonal matrix elements should be excluded
with_inds – If True, (i,j) (e_i, e_j) is returned else (e_i, e_j)
>>> for (ij, mate) in iuptri([0,1], with_inds=True): ... print("ij:", ij, "mate:", mate) ij: (0, 0) mate: (0, 0) ij: (0, 1) mate: (0, 1) ij: (1, 1) mate: (1, 1)