Check if a Python object is a null externalptr
py_is_null_xptr(x)
py_validate_xptr(x)Logical indicating whether the object is a null externalptr
When Python objects are serialized within a persisted R environment (e.g. .RData file) they are deserialized into null externalptr objects (since the Python session they were originally connected to no longer exists). This function allows you to safely check whether whether a Python object is a null externalptr.
The py_validate function is a convenience function which calls
py_is_null_xptr and throws an error in the case that the xptr
is NULL.