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stream.Pipe memoize option unused? #6653

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stream.Pipe memoize option unused?#6653
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@SimonHeybrock

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@SimonHeybrock
SimonHeybrock
opened on Jul 9, 2025

Is was trying to understand what the memoize option to holoviews.streams.Pipe does, but contrary to what the docstring says this option seems unused (unless the is some metaclass magic that I cannot see):

holoviews/holoviews/streams.py

Lines 514 to 540 in 0541eae

class Pipe(Stream):
"""A Stream used to pipe arbitrary data to a callback.
Unlike other streams memoization can be disabled for a
Pipe stream (and is disabled by default).
"""
data = param.Parameter(default=None, constant=True, doc="""
Arbitrary data being streamed to a DynamicMap callback.""")
def __init__(self, data=None, memoize=False, **params):
super().__init__(data=data, **params)
self._memoize_counter = 0
def send(self, data):
"""A convenience method to send an event with data without
supplying a keyword.
"""
self.event(data=data)
def _on_trigger(self):
self._memoize_counter += 1
@property
def hashkey(self):
return {'_memoize_key': self._memoize_counter}

Is this intentional or a bug?

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