append all Python class bases to R class attribute about reticulate

[jjallaire]

Interesting, I was under the impression that __bases__ would provide the entire hierarchy. Looks like that logic needs to be in a loop up to the top level. I'll try to make that change for the next release.

[jjallaire]

It looks like inspect.getmro will do the correct traversal: http://stackoverflow.com/questions/1401661/list-all-base-classes-in-a-hierarchy-of-given-class

[jjallaire]

@goldingn This PR should address this issue: #31

Could you take a look and let me know if this looks okay to you? (i.e. am I missing any subtleties here)

[goldingn]

Yeah, that's perfect. I get:

devtools::install_github('rstudio/reticulate@930b283')

library(reticulate)
gp <- import('GPflow')
k1 <- gp$kernels$Constant(1)
k2 <- gp$kernels$Bias(1)
k3 <- gp$kernels$Cosine(1)
class(k1); class(k2); class(k3)

[1] "GPflow.kernels.Constant"    "GPflow.kernels.Static"      "GPflow.kernels.Kern"       
[4] "GPflow.param.Parameterized" "GPflow.param.Parentable"    "python.builtin.object"     
[1] "GPflow.kernels.Bias"        "GPflow.kernels.Constant"    "GPflow.kernels.Static"     
[4] "GPflow.kernels.Kern"        "GPflow.param.Parameterized" "GPflow.param.Parentable"   
[7] "python.builtin.object"     
[1] "GPflow.kernels.Cosine"      "GPflow.kernels.Stationary"  "GPflow.kernels.Kern"       
[4] "GPflow.param.Parameterized" "GPflow.param.Parentable"    "python.builtin.object" 

Thanks!