Python RPy2 function with multiple input arguments - python-2.7

Question

I am looking to call an rPy2 function with multiple input parameters. Here is the R function write.csv that I am trying to use. It has multiple input parameters and I need to specify more than one such parameter.
If I use it without the optional parameter row.names and column.names, it works like this:
r("write.csv")(d,file='myfilename.csv')
For my requirements, I must issue this command with the optional parameters row.names and column.names. So, I tried:
r('write.csv')(d, file='myfilename.csv', row.names=FALSE, column.names=FALSE)
but I got this error message:
File "/home/UserName/test.py", line 12
r("write.csv")(d,file='myfilename.csv',row.names=FALSE, column.names=FALSE)
SyntaxError: keyword can't be an expression
[Finished in 0.0s with exit code 1]
[shell_cmd: python -u "/home/UserName/test.py"]
[dir: /home/UserName]
[path: /home/UserName/bin:/home/UserName/.local/bin:/usr/local/sbin:/usr/local/bin:
.../usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/snap/bin]
How can I achieve write.csv with row.names=FALSE and column.names=FALSE, in rPy2?

Answer 1

You can use Python's **.
See the note here: http://rpy2.readthedocs.io/en/version_2.8.x/robjects_functions.html#callable

Answer 2

Ony of my mistakes was that I should have replaced . by _, as shown in the docs here:
from rpy2.robjects.packages import importr
base = importr('base')
base.rank(0, na_last = True)
so I would analogously need row_names = TRUE. However, the . in write.csv() still remained, so this only solved part of the question. Ok, so I tried a few things to get an answer:
Generating sample data:
from rpy2.robjects import r, globalenv
from rpy2.robjects import IntVector, DataFrame
d = {'a': IntVector((1,2,3)), 'b': IntVector((4,5,6))}
dataf = DataFrame(d)
Attempts follow - 1. did not work, 2. and 3. did work:
1:
r('write_csv')(x=dataf,file='testing.csv',row_names=False)
Traceback (most recent call last):
File "C:\Users\UserName\FileD\test.py", line 18, in <module>
r('write_csv')(x=dataf,file='testing.csv',row_names=False)
File "C:\Python27\lib\site-packages\rpy2\robjects\__init__.py", line 321, in __call__
res = self.eval(p)
File "C:\Python27\lib\site-packages\rpy2\robjects\functions.py", line 178, in __call__
return super(SignatureTranslatedFunction, self).__call__(*args, **kwargs)
File "C:\Python27\lib\site-packages\rpy2\robjects\functions.py", line 106, in __call__
res = super(Function, self).__call__(*new_args, **new_kwargs)
rpy2.rinterface.RRuntimeError: Error in eval(expr, envir, enclos) : object 'write_csv'
..not found
Error in eval(expr, envir, enclos) : object 'write_csv' not found
2.
r('''
write_csv <- function(x,verbose=FALSE)
write.csv(x,file='testing.csv',row.names=FALSE)
''')
r['write_csv'](dataf)
3.
globalenv['dataf'] = dataf
r("write.csv(dataf,file='testing2.csv',row.names=FALSE)")
I was really hoping attempt 1. would have worked. It seemed I had reproduced the example in the docs base.rank(0, na_last = True), but I think something might have still been missing.