def slice(source: Observable) -> Observable:
"""The partially applied slice operator.
Slices the given observable. It is basically a wrapper around the operators
:func:`skip <rx.operators.skip>`,
:func:`skip_last <rx.operators.skip_last>`,
:func:`take <rx.operators.take>`,
:func:`take_last <rx.operators.take_last>` and
:func:`filter <rx.operators.filter>`.
The following diagram helps you remember how slices works with streams.
Positive numbers are relative to the start of the events, while negative
numbers are relative to the end (close) of the stream.
.. code::
r---e---a---c---t---i---v---e---!
0 1 2 3 4 5 6 7 8
-8 -7 -6 -5 -4 -3 -2 -1 0
Examples:
>>> result = source.slice(1, 10)
>>> result = source.slice(1, -2)
>>> result = source.slice(1, -1, 2)
Args:
source: Observable to slice
Returns:
A sliced observable sequence.
"""
if has_stop and _stop >= 0:
pipeline.append(ops.take(_stop))
if has_start and _start > 0:
pipeline.append(ops.skip(_start))
if has_start and _start < 0:
pipeline.append(ops.take_last(abs(_start)))
if has_stop and _stop < 0:
pipeline.append(ops.skip_last(abs(_stop)))
if has_step:
if _step > 1:
pipeline.append(
ops.filter_indexed(lambda x, i: i % _step == 0))
elif _step < 0:
# Reversing events is not supported
raise TypeError('Negative step not supported.')
return source.pipe(*pipeline)
def slice(source: Observable) -> Observable:
"""The partially applied slice operator.
Slices the given observable. It is basically a wrapper around the
operators skip(), skip_last(), take(), take_last() and filter().
This marble diagram helps you remember how slices works with streams.
Positive numbers is relative to the start of the events, while negative
numbers are relative to the end (close) of the stream.
r---e---a---c---t---i---v---e---|
0 1 2 3 4 5 6 7 8
-8 -7 -6 -5 -4 -3 -2 -1 0
Examples:
>>> result = source.slice(1, 10)
>>> result = source.slice(1, -2)
>>> result = source.slice(1, -1, 2)
Args:
source: Observable to slice
Returns:
A sliced observable sequence.
"""
if has_stop and stop >= 0:
pipeline.append(ops.take(stop))
if has_start and start > 0:
pipeline.append(ops.skip(start))
if has_start and start < 0:
pipeline.append(ops.take_last(abs(start)))
if has_stop and stop < 0:
pipeline.append(ops.skip_last(abs(stop)))
if has_step:
if step > 1:
pipeline.append(ops.filter_indexed(lambda x, i: i % step == 0))
elif step < 0:
# Reversing events is not supported
raise TypeError("Negative step not supported.")
return source.pipe(*pipeline)
def slice(source: Observable) -> Observable:
"""The partially applied slice operator.
Slices the given observable. It is basically a wrapper around the
operators skip(), skip_last(), take(), take_last() and filter().
This marble diagram helps you remember how slices works with streams.
Positive numbers is relative to the start of the events, while negative
numbers are relative to the end (close) of the stream.
r---e---a---c---t---i---v---e---|
0 1 2 3 4 5 6 7 8
-8 -7 -6 -5 -4 -3 -2 -1 0
Examples:
>>> result = source.slice(1, 10)
>>> result = source.slice(1, -2)
>>> result = source.slice(1, -1, 2)
Args:
source: Observable to slice
Returns:
A sliced observable sequence.
"""
if has_stop and stop >= 0:
pipeline.append(ops.take(stop))
if has_start and start > 0:
pipeline.append(ops.skip(start))
if has_start and start < 0:
pipeline.append(ops.take_last(abs(start)))
if has_stop and stop < 0:
pipeline.append(ops.skip_last(abs(stop)))
if has_step:
if step > 1:
pipeline.append(ops.filter_indexed(lambda x, i: i % step == 0))
elif step < 0:
# Reversing events is not supported
raise TypeError("Negative step not supported.")
return source.pipe(*pipeline)
import rx
import rx.operators as ops
numbers = rx.from_([1, 2, 3, 4, 5, 6])
numbers.pipe(ops.skip_last(2)).subscribe(
on_next=lambda i: print("on_next {}".format(i)),
on_error=lambda e: print("on_error: {}".format(e)),
on_completed=lambda: print("on_completed"))
def create():
return xs.pipe(ops.skip_last(1))
op.buffer() op.group_by() op.map() op.scan() # ... """Filtering""" op.debounce() op.distinct() op.filter() op.element_at() op.first() op.ignore_elements() op.last() op.skip() op.skip_last() op.take() op.take_last() # ... """Error Handling""" op.catch() op.retry() """Utility""" op.delay() op.materialize() op.time_interval() op.timeout() op.timestamp()
