fixing doctest: the order of 1,4,2 depends on hash and is not unique

Author: realead

pandas/core/base.py

@@ -1189,9 +1189,9 @@ def value_counts(
         >>> index = pd.Index([3, 1, 2, 3, 4, np.nan])
         >>> index.value_counts()
         3.0    2
+        1.0    1
         4.0    1
         2.0    1
-        1.0    1
         dtype: int64
 
         With `normalize` set to `True`, returns the relative frequency by
@@ -1200,9 +1200,9 @@ def value_counts(
         >>> s = pd.Series([3, 1, 2, 3, 4, np.nan])
         >>> s.value_counts(normalize=True)
         3.0    0.4
+        1.0    0.2
         4.0    0.2
         2.0    0.2
-        1.0    0.2
         dtype: float64
 
         **bins**
@@ -1224,10 +1224,10 @@ def value_counts(
 
         >>> s.value_counts(dropna=False)
         3.0    2
-        NaN    1
+        1.0    1
         4.0    1
         2.0    1
-        1.0    1
+        NaN    1
         dtype: int64
         """
         result = value_counts(