Non-conditional density estimators are initialized with context_features=None, should support 0 as well

[dgreenberg]

the CDEs have a default input context_features which defaults to None. When this is a positive integer, we get a CDE, for a DE we need to set it to None. It should support a value of zero, though.

[alvorithm]

Example at mackelab/nflows:

nflows/nflows/transforms/autoregressive.py

Line 68 in 78b5796

context_features=None,

As far as I can tell, this issue now belongs in mackelab/nflows, then upstreamed. What do you think, @dgreenberg?

[dgreenberg]

Example at mackelab/nflows:

nflows/nflows/transforms/autoregressive.py

Line 68 in 78b5796

context_features=None,

As far as I can tell, this issue now belongs in mackelab/nflows, then upstreamed. What do you think, @dgreenberg?

Agreed