Description Usage Arguments Value Examples
This function runs a Python function taking as arguments R objects and
returning an R object. Some limitations exist as to the nature of the
objects that can be passed between R and Python, mainly which data types
can be converted to/from JSON in R (using jsonlite
) and Python
(using the json
module).
1 2 3 |
fname |
name of function/method to call |
... |
R objects to pass as arguments to the Python function or method |
json.opt.args |
explicit arguments to pass to |
json.opt.ret |
explicit arguments to pass to |
an R object containing the function or method call return value after serialization to JSON in the Python environment and deserialization from JSON in the R environment
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 | py.call("len", 1:3)
# [1] 3
py.call("repr", 1:3)
# [1] "[1, 2, 3]"
a <- 1:4
b <- 5:8
py.exec("def concat(a,b): return a+b")
py.call("concat", a, b)
# [1] 1 2 3 4 5 6 7 8
py.assign("a", "hola hola")
py.call("a.split", " ")
# [1] "hola" "hola"
# by default jsonlite::toJSON is called on the function call arguments
# with auto_unbox = TRUE, so vectors of length 1 are simplified to
# scalar values in Python
py.call("repr", "foo bar")
# [1] "u'foo bar'"
# if we explicitly set auto_unbox to FALSE, a vector of length 1
# becomes a Python list of length 1
py.call("repr", "foo bar", json.opt.args = list(auto_unbox = FALSE))
# [1] "[u'foo bar']"
|
SnakeCharmR 1.0.7.1 - R and Python Integration
Contribute and submit issues at https://github.com/asieira/SnakeCharmR
Python version 2.7.6 (default, Nov 13 2018, 12:50:15)
[GCC 4.8.4]
[1] 3
[1] "[1, 2, 3]"
[1] 1 2 3 4 5 6 7 8
[1] "hola" "hola"
[1] "u'foo bar'"
[1] "[u'foo bar']"
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