Correct ImportError message.
@@ -13,7 +13,7 @@ try:
import unicodedata # noqa: F401
import pexpect # noqa: F401
except ImportError:
- raise ImportError('Please `pip install regex scipy sklearn pexpect`'
+ raise ImportError('Please `pip install regex scipy scikit-learn pexpect`'
' to use the tfidf_retriever agent.')
from parlai.core.agents import Agent
