pySet: assigns R objects to Python

In Sage-Bionetworks/PythonEmbedInR: Use an embedded Python from Within R

assigns R objects to Python

Description

The function pySet allows to assign R objects to the Python namespace, the conversion from R to Python is done automatically.

Usage

pySet(key, value, namespace = "__main__", useSetPoly = TRUE,
  useNumpy = pyOptions("useNumpy"), usePandas = pyOptions("usePandas"))

Arguments

key	a string specifying the name of the Python object.
value	a R object which is assigned to Python.
namespace	a string specifying where the key should be located. If the namespace is set to "__main__" the key will be set to the global namespace. But it is also possible to set attributes of objects e.g. the attribute name of the object 'os'.
useSetPoly	an optional logical, giving if pySetPoly should be used to transform R objects into Python objects. For example if useSetPoly is TRUE unnamed vectors are transformed to Python objects of type PrVector else to lists.
useNumpy	an optional logical, default is FALSE, to control if numpy should be used for the type conversion of matrices.
usePandas	an optional logical, default is FALSE, to control if pandas should be used for the type conversion of data frames.

Details

More information about the type conversion can be found in the README file or at http://pythoninr.bitbucket.org/.

Examples

pySet("x", 3)
pySet("M", diag(1,3))
pyImport("os")
pySet("name", "Hello os!", namespace="os")
## In some situations it can be beneficial to convert R lists or vectors
## to Python tuple instead of lists. One way to accomplish this is to change
## the class of the vector to "tuple".
y <- c(1, 2, 3)
class(y) <- "tuple"
pySet("y", y)
## pySet can also be used to change values of objects or dictionaries.
asTuple <- function(x) {
 class(x) <- "tuple"
 return(x)
}
pyExec("d = dict()")
pySet("myTuple", asTuple(1:10), namespace="d")
pySet("myList", as.list(1:5), namespace="d")

Sage-Bionetworks/PythonEmbedInR documentation built on April 17, 2023, 4:23 p.m.