SliceSpan
class SliceSpan(start, stop, data_slices)
An ExecutionSpan for data stored in a sliceable format.
This type of execution span references pub result data by assuming that it is a sliceable portion of the (row major) flattened data. Therefore, for each pub dependent on this span, the constructor accepts a single slice object, along with the corresponding shape of the data to be sliced.
Parameters
- start (
datetime) – The start time of the span, in UTC. - stop (
datetime) – The stop time of the span, in UTC. - data_slices (
dict[int,tuple[Tuple[int,...],slice]]) – A map from pub indices to pairs(shape_tuple, slice).
Attributes
duration
The duration of this span, in seconds.
Return type
float
pub_idxs
Return type
list[int]
size
Return type
int
start
The start time of the span, in UTC.
Return type
datetime
stop
The stop time of the span, in UTC.
Return type
datetime
Methods
contains_pub
contains_pub(pub_idx)
Return whether the pub with the given index has data with dependence on this span.
Parameters
pub_idx (int | Iterable[int]) – One or more pub indices from the original primitive call.
Return type
bool
Returns
Whether there is dependence on this span.
filter_by_pub
filter_by_pub(pub_idx)
Return a new span whose slices are filtered to the provided pub indices.
For example, if this span contains slice information for pubs with indices 1, 3, 4 and [1, 4] is provided, then the span returned by this method will contain slice information for only those two indices, but be identical otherwise.
Parameters
pub_idx (int | Iterable[int]) – One or more pub indices from the original primitive call.
Return type
Returns
A new filtered span.
mask
mask(pub_idx)
Return an array-valued mask specifying which parts of a pub result depend on this span.
Parameters
pub_idx (int) – The index of the pub to return a mask for.
Return type
Returns
An array with the same shape as the pub data.