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Showing content from https://github.com/pandas-dev/pandas/issues/9272 below:

inconsistent constructors for sparse and dense objects · Issue #9272 · pandas-dev/pandas · GitHub

Continuing on my recent sparse kick...

I appreciate the fact that Series(), DataFrame(), and Panel() all return empty versions of themselves. I think it's reasonable to expect that their sparse counterparts would behave the same way, but this is only the case for SparseDataFrame() (it's even tested).

pd.SparseSeries()
---------------------------------------------------------------------------
TypeError                                 Traceback (most recent call last)
<ipython-input-375-46c1881ac0a7> in <module>()
----> 1 pd.SparseSeries()

TypeError: __init__() missing 1 required positional argument: 'data'

and similar for SparsePanel().

I can submit a PR to change this behavior.


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