ENH: Adding is_trusted function

.gitignore

@@ -122,3 +122,6 @@ node_modules
 
 exports
 trash
+
+#spyder
+.spyproject

docs/persistence.rst

@@ -231,7 +231,7 @@ mean you can just call `sio.load(<file>,
 trusted=get_untrusted_types(file=<file>))` on this object -- only pass the
 types you really trust to the ``trusted`` argument.
 
-Supported libraries
+Supported/Trusted libraries
 -------------------
 
 Skops intends to support all of **scikit-learn**, that is, not only its

skops/io/__init__.py

@@ -1,4 +1,5 @@
-from ._persist import dump, dumps, get_untrusted_types, load, loads
+from ._persist import dump, dumps, get_untrusted_types, load, loads, is_trusted
 from ._visualize import visualize
 
-__all__ = ["dumps", "load", "loads", "dump", "get_untrusted_types", "visualize"]
+__all__ = ["dumps", "load", "loads", "dump", "get_untrusted_types", 
+           "visualize","is_trusted"]

skops/io/_persist.py

@@ -6,11 +6,14 @@
 from pathlib import Path
 from typing import Any, BinaryIO, Optional, Sequence
 from zipfile import ZIP_STORED, ZipFile
+from inspect import getmembers
 
 import skops
 
+from skops.io import _trusted_types
 from ._audit import NODE_TYPE_MAPPING, audit_tree, get_tree
-from ._utils import LoadContext, SaveContext, _get_state, get_state
+from ._utils import LoadContext, SaveContext, _get_state, get_state, get_type_name
+
 
 # We load the dispatch functions from the corresponding modules and register
 # them. Old protocols are found in the 'old/' directory, with the protocol
@@ -235,3 +238,43 @@ def get_untrusted_types(
         untrusted_types = tree.get_unsafe_set()
 
     return sorted(untrusted_types)
+
+def is_trusted(obj)-> list[bool]:
+    """Return a list of bools specifying if passed objects are trusted.
+
+    Parameters
+    ----------
+    obj: list, dictionary, or Any
+        A list, dictionary or single object to be checked.
+        All objected that are trusted return True, untrusted False
+        For dictionaries values are checked
+
+    Returns
+    -------
+    trust: list of bools
+        A list of bools specifying if the types of the passed objects
+        are trusted.
+    """
+
+    val = list() # to hold trusted types
+    trust = list() # to determine if passed objects are trusted
+
+    # loop over _trusted_types to find all trusted types
+    # and add them to a single list
+    for w in getmembers(_trusted_types):
+        if 'NAMES' in w[0] and isinstance(w[1],list):
+            val.append(w[1])
+
+    t_type = [v for vs in val for v in vs]
+
+    # check is passed object is in trusted types
+    if isinstance(obj, list):
+        for value in obj:
+            trust.append(get_type_name(type(value)) in t_type)
+    elif isinstance(obj, dict):
+        for value in obj.values():
+            trust.append(get_type_name(type(value)) in t_type)
+    else:
+        trust.append(get_type_name(type(obj)) in t_type)
+
+    return trust