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New pipe method for more intuitive multidimensional dim transforms #3790

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Jan 6, 2020
Merged

New pipe method for more intuitive multidimensional dim transforms #3790

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13 changes: 13 additions & 0 deletions holoviews/util/transform.py
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Original file line number Diff line number Diff line change
Expand Up @@ -171,6 +171,19 @@ def register(cls, key, function):
"""
cls._custom_funcs[key] = function

@classmethod
def pipe(cls, func, *args, **kwargs):
"""
Wrapper to give multidimensional transforms a more intuitive syntax.
For a custom function 'func' with signature (*args, **kwargs), call as
dim.pipe(func, *args, **kwargs).
"""
args = list(args) # make mutable
for k, arg in enumerate(args):
if isinstance(arg, basestring):
args[k] = dim(arg)
return dim(args[0], func, *args[1:], **kwargs)

# Builtin functions
def __abs__(self): return dim(self, abs)
def __round__(self, ndigits=None):
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