minior fixes

Author: microslaw

doc/source/user_guide/indexing.rst

@@ -712,6 +712,7 @@ as a string.
 
 .. ipython:: python
 
+   1/0
     df2 = pd.DataFrame({'col1': [9, 8, 7, 6],
                         'weight_column': [0.5, 0.4, 0.1, 0]})
     df2.sample(n=3, weights='weight_column')

pandas/core/sample.py

@@ -150,7 +150,7 @@ def sample(
         else:
             raise ValueError("Invalid weights: weights sum to zero")
 
-        is_max_weight_dominating = size * max(weights) > 1
+        is_max_weight_dominating = size * weights.max() > 1
         if is_max_weight_dominating and not replace:
             raise ValueError(
                 "Invalid weights: If `replace`=False, "