SliceRecord

class SliceRecord(*, parent_len: int, start: int | None = None, stop: int | None = None, step: int | None = None, offset: int = 0)

records cumulative slice operations on an object without modifying it

Attributes:

is_reversed

offset

parent_len

parent_start

returns the start on the parent plus strand

parent_stop

returns the stop on the parent plus strand

plus_start

start on plus strand

plus_step

step on plus strand

plus_stop

stop on plus strand

start

step

stop

Methods

absolute_position(rel_index[, include_boundary])	Converts an index relative to the current view to be with respect to the coordinates of the original "Python sequence".
relative_position(abs_index[, stop])	converts an index on the original "Python sequence" into an index on this "view"

copy
to_rich_dict

Notes

Basis for lazy evaluation of slicing operations on sequences and alignments. A reference to an instance of this class is used by different view objects.

absolute_position(rel_index: int, include_boundary: bool = False)

Converts an index relative to the current view to be with respect to the coordinates of the original “Python sequence”.

Parameters:

rel_index

relative position with respect to the current view

Returns:

the absolute index with respect to the coordinates of the original

sequence (including offset if present).

copy(sliced: bool = False)

property is_reversed

property offset: int

property parent_len: int

property parent_start: int

returns the start on the parent plus strand

Returns:

offset + start, taking into account whether reversed. Result

is positive.

Notes

This should NOT be used for slicing on the parent object.

property parent_stop: int

returns the stop on the parent plus strand

Returns:

offset + stop, taking into account whether reversed. Result

is positive.

Notes

This should NOT be used for slicing on the parent object.

property plus_start: int

start on plus strand

property plus_step: int

step on plus strand

property plus_stop: int

stop on plus strand

relative_position(abs_index: int, stop: bool = False)

converts an index on the original “Python sequence” into an index on this “view”

Notes

The returned value DOES NOT reflect python indexing. Importantly, negative values represent positions that precede the current view.

start

step

stop

to_rich_dict() → dict