CODEWITHSUNDEEP
pythonrrpy2
ArunK
ArunK

Reputation: 1781

rpy2 zoo unused argument

I've been recently trying to use rpy2 and import zoo library into python. however, when I run the following sets of code, I receive the following error

from rpy2.robjects.packages import importr
r_zoo = importr("zoo")
r_zoo.rollapply(ddf,FUN = r_func.fun1, width = 10, align = "left",by_column = True)

res = super(Function, self).call(*new_args, **new_kwargs) rpy2.rinterface.RRuntimeError: Error in FUN(data[posns], ...) : unused argument (by_column = TRUE)

The equivalent r code is 

rollapply(ddf,FUN = r_func.fun1, width = 10, align = "left",by.column = True)

I understand that when we use the importr from rpy2.robjects.packages it automatically converts the '.' in Rlang to '_' in python.

Upvotes: 1

Views: 361

Answers (1)

Giannis Spiliopoulos
Giannis Spiliopoulos

Reputation: 2698

Two ways to get around that problem:

  • Use a kwargs dict

    r_zoo.rollapply(ddf,FUN = r_func.fun1, width = 10, align = "left",**{"by.column":True})

  • Explicitly specify that by_column is to be translated to by.column

    from rpy2.robjects.functions import SignatureTranslatedFunction`
r_zoo.rollapply = SignatureTranslatedFunction(r_zoo.rollapply, init_prm_translate = {'by_column': 'by.column'})

Source

Upvotes: 0

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