Indexing routines

See also

basics.indexing

Generating index arrays

c_	Translates slice objects to concatenation along the second axis.
r_	Translates slice objects to concatenation along the first axis.
nonzero(a)	Return the indices of the elements that are non-zero.
where(condition, [x, y], /)	Return elements chosen from x or y depending on condition.
indices(dimensions[, dtype, chunk_size])	Return an array representing the indices of a grid.
ogrid	nd_grid instance which returns an open multi-dimensional "meshgrid".
unravel_index(indices, shape[, order])	Converts a flat index or array of flat indices into a tuple of coordinate arrays.

Indexing-like operations

take(a, indices[, axis, out])	Take elements from an array along an axis.
choose(a, choices[, out, mode])	Construct an array from an index array and a list of arrays to choose from.
compress(condition, a[, axis, out])	Return selected slices of an array along given axis.
diag(v[, k, sparse, gpu, chunk_size])	Extract a diagonal or construct a diagonal array.
select	This module supports asynchronous I/O on multiple file descriptors.

Inserting data into arrays

fill_diagonal(a, val[, wrap])

Fill the main diagonal of the given array of any dimensionality.

Iterating over arrays

ndindex(*shape)

An N-dimensional iterator object to index arrays.