Add env var for disabling

Author: dfalbel

NEWS.md

@@ -29,7 +29,7 @@
   variables via unpacking (#1844).
 
 - reticulate now warns when `py_require()`d packages are not found in the selected
-  Python virtual environment (#1850).
+  Python virtual environment. This behavior can be disabled by setting the environment variable `RETICULATE_CHECK_REQUIRED_PACKAGES=0` (#1850).
 
 # reticulate 1.43.0
 

R/package.R

@@ -290,11 +290,14 @@ initialize_python <- function(required_module = NULL, use_environment = NULL) {
       py_allow_threads_impl(TRUE)
     }
   }
-
   if (nzchar(config$virtualenv)) {
-    tryCatch(check_virtualenv_required_packages(config), error = function(e) {
-      # ignore errors, this should never block initialization
-    })
+    check_required_packages <- Sys.getenv("RETICULATE_CHECK_REQUIRED_PACKAGES", "true")
+    check_required_packages <- tolower(check_required_packages) %in% c("true", "1", "yes")
+    if (check_required_packages) {
+      tryCatch(check_virtualenv_required_packages(config), error = function(e) {
+        # ignore errors, this should never block initialization
+      })
+    }
   }
 
   # return config