Comments (2)
I understand you have an issue about the inconsistency between names
and propertynames
.
The current design is based on the following reasoning:
- the
names
function does not promise anything, it only promises to return names of columns. Therefore it can be defined onGroupedDataFrame
. - the
propertynames
on the other hand has a promise. It promises that if you writegdf.x
when:x
was returned as a property ofgdf
object you get a meaningful result. The problem is that it is not clear whatgdf.x
should return ifgdf
is aGroupedDataFrame
having a column:x
. We cannot just returnparent(gdf).x
as it is not the same. For this reason currentlypropertynames
andgetproperty
was left untouched from the default.
However, for the future we could discuss changing it provided that we find some meaningful value that would be returned by gdf.x
.
from dataframes.jl.
Maybe an alternative would be to have a better suggestion than propertynames
to return the column names as symbol? Does Symbol.(names())
always return the right answer? If so, I would suggest to use that syntax in the doc instead of propertynames
from dataframes.jl.
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