How to stop the annoying warnings output by reticulate in R

I am trying to read a pickle data in R, I have following R code:

library(reticulate)
pd <- suppressMessages(import("pandas"))
hubs.data <- suppressWarnings(pd$read_pickle("input.pickle"))

The code is worked well, but its will output a warnning:

sys:1: FutureWarning: pandas.Float64Index is deprecated and will be removed from pandas in a future version. Use pandas.Index with the appropriate dtype instead.
sys:1: FutureWarning: pandas.Int64Index is deprecated and will be removed from pandas in a future version. Use pandas.Index with the appropriate dtype instead.
sys:1: FutureWarning: pandas.UInt64Index is deprecated and will be removed from pandas in a future version. Use pandas.Index with the appropriate dtype instead.

This warning will show when exculate any other R code line after this. I want to stop it.

I have tried:

pd <- suppressWarnings(import("pandas"))
# or
pd <- suppressMessages(import("pandas"))

But the suppressWarnings/suppressMessages seem not work

Solution

You can control Python warnings within Python / through reticulate; this is basically what reticulate::py_suppress_warnings() does.

For testings purposes we first set up a reprex to always show warnings, otherwise trigger_warning() would only warn once, during the first occurrence. Then we'll suppress it with warnings$simplefilter("ignore") when calling from R (or with warnings.simplefilter("ignore") from Python).

Python warning categories and filter actions along with examples can be found from https://docs.python.org/3/library/warnings.html

library(reticulate)
# use specific conda env
# use_condaenv("py311") 

# change Python(!) warning action from `once` to `always` for testing;
# create a dummy function to trigger FutureWarning
py_run_string('
import warnings

warnings.simplefilter("always")
def trigger_warning():
  warnings.warn("a future warning", FutureWarning)
  return 42
')

# triggering a warning:
py$trigger_warning()
#> <string>:6: FutureWarning: a future warning
#> [1] 42

# control Pyhon warnings through reticulate:
warnings <- import("warnings")

# ignore / suppress:
warnings$simplefilter("ignore")
py$trigger_warning()
#> [1] 42