name 'classification_report' is not defined

`classification_report` is a function from the `sklearn.metrics` module in scikit-learn. You need to import it before using it. Here's an example:

from sklearn.metrics import classification_report

# Your code for predicting and evaluating the model goes here

print(classification_report(y_true, y_pred))

Make sure you have scikit-learn installed (`pip install scikit-learn`) and import the necessary modules in your script.