Add better error message for invalid feature names (#5024)

2019-11-10 02:58:14 +09:00 · 2019-11-10 02:58:14 +09:00 · 374648c21a
commit 374648c21a
parent 7663de956c
1 changed files with 1 additions and 1 deletions
--- a/python-package/xgboost/core.py
+++ b/python-package/xgboost/core.py
@ -999,7 +999,7 @@ class DMatrix(object):
            if not all(isinstance(f, STRING_TYPES) and
                       not any(x in f for x in set(('[', ']', '<')))
                       for f in feature_names):
-                raise ValueError('feature_names may not contain [, ] or <')
+                raise ValueError('feature_names must be string, and may not contain [, ] or <')
        else:
            # reset feature_types also
            self.feature_types = None