update: isolate presidio dependencies

guardrails_genie/guardrails/__init__.py

@@ -1,9 +1,12 @@
-from guardrails_genie.guardrails.entity_recognition import (
-    PresidioEntityRecognitionGuardrail,
-    RegexEntityRecognitionGuardrail,
-    RestrictedTermsJudge,
-    TransformersEntityRecognitionGuardrail,
-)
+try:
+    from guardrails_genie.guardrails.entity_recognition import (
+        PresidioEntityRecognitionGuardrail,
+        RegexEntityRecognitionGuardrail,
+        RestrictedTermsJudge,
+        TransformersEntityRecognitionGuardrail,
+    )
+except ImportError:
+    pass
 from guardrails_genie.guardrails.injection import (
     PromptInjectionClassifierGuardrail,
     PromptInjectionLlamaGuardrail,

guardrails_genie/guardrails/entity_recognition/__init__.py

@@ -3,10 +3,12 @@ import warnings
 from .llm_judge_entity_recognition_guardrail import RestrictedTermsJudge
 
 try:
-    from .presidio_entity_recognition_guardrail import PresidioEntityRecognitionGuardrail
+    from .presidio_entity_recognition_guardrail import (
+        PresidioEntityRecognitionGuardrail,
+    )
 except ImportError:
     warnings.warn(
-        "Presidio is not installed. You can install it using `pip install -e .[presidio]`"
+        "Presidio is not installed. If you want to use `PresidioEntityRecognitionGuardrail`, you can install the required packages using `pip install -e .[presidio]`"
     )
 
 from .regex_entity_recognition_guardrail import RegexEntityRecognitionGuardrail