Using writeOGR with rpy2 - r

Question

I am trying to use writeOGR using R called from Python 3.8.
import rpy2.robjects as ro
.....
ro.r('ttops <- .....')
ro.r('writeOGR(obj=ttops, dsn="T:/Internal/segmentation", layer="test", driver="ESRI Shapefile")')
errors with:
R[write to console]: Error in writeOGR(obj = ttops, dsn = "T:/Internal/LiDAR/crown_segmentation", :
could not find function "writeOGR"
Traceback (most recent call last):
File "C:/Users/david/PycharmProjects/main.py", line 7, in <module>
main()
File "C:/Users/david/PycharmProjects/main.py", line 4, in main
R_Packages().process()
File "C:\Users\david\PycharmProjects\model_testing\r_methods.py", line 17, in process
ro.r('writeOGR(obj=ttops, dsn="T:/Internal/segmentation", layer="test", driver="ESRI Shapefile")')
File "C:\Users\david\AppData\Local\Programs\Python\Python38\lib\site-packages\rpy2\robjects\__init__.py", line 416, in __call__
res = self.eval(p)
File "C:\Users\david\AppData\Local\Programs\Python\Python38\lib\site-packages\rpy2\robjects\functions.py", line 197, in __call__
return (super(SignatureTranslatedFunction, self)
File "C:\Users\david\AppData\Local\Programs\Python\Python38\lib\site-packages\rpy2\robjects\functions.py", line 125, in __call__
res = super(Function, self).__call__(*new_args, **new_kwargs)
File "C:\Users\david\AppData\Local\Programs\Python\Python38\lib\site-packages\rpy2\rinterface_lib\conversion.py", line 44, in _
cdata = function(*args, **kwargs)
File "C:\Users\david\AppData\Local\Programs\Python\Python38\lib\site-packages\rpy2\rinterface.py", line 624, in __call__
raise embedded.RRuntimeError(_rinterface._geterrmessage())
rpy2.rinterface_lib.embedded.RRuntimeError: Error in writeOGR(obj = ttops, dsn = "T:/Internal/segmentation", :
could not find function "writeOGR"
Am I missing something or is this a limit of rpy2? If it is a limit, what is an alternative to write shapefiles of R data using Python?

Answer 1

There was a library that I did not need to define in R that was needed in Python:
ro.r('library(rgdal)')