diff --git a/dspy/dsp/utils/dpr.py b/dspy/dsp/utils/dpr.py
index d4d18f84ff..3f9531553f 100644
--- a/dspy/dsp/utils/dpr.py
+++ b/dspy/dsp/utils/dpr.py
@@ -5,9 +5,11 @@
 """
 
 import unicodedata
-
+import copy
+import logging
 import regex
 
+logger = logging.getLogger(__name__)
 
 class Tokens:
     """A class to represent a list of tokenized text."""