remove arg from construct_array_type as no longer needed

Author: jreback

pandas/core/algorithms.py

@@ -154,7 +154,7 @@ def _reconstruct_data(values, dtype, original):
     """
     from pandas import Index
     if is_extension_array_dtype(dtype):
-        values = dtype.construct_array_type(values)._from_sequence(values)
+        values = dtype.construct_array_type()._from_sequence(values)
     elif is_datetime64tz_dtype(dtype) or is_period_dtype(dtype):
         values = Index(original)._shallow_copy(values, name=None)
     elif is_bool_dtype(dtype):

pandas/core/dtypes/dtypes.py

@@ -325,13 +325,9 @@ def _hash_categories(categories, ordered=True):
             return np.bitwise_xor.reduce(hashed)
 
     @classmethod
-    def construct_array_type(cls, array=None):
+    def construct_array_type(cls):
         """Return the array type associated with this dtype
 
-        Parameters
-        ----------
-        array : array-like, optional
-
         Returns
         -------
         type

pandas/core/series.py

@@ -4093,7 +4093,7 @@ def _try_cast(arr, take_fast_path):
                                      ordered=dtype.ordered)
             elif is_extension_array_dtype(dtype):
                 # create an extension array from its dtype
-                array_type = dtype.construct_array_type(subarr)
+                array_type = dtype.construct_array_type()
                 subarr = array_type(subarr, copy=copy)
 
             elif dtype is not None and raise_cast_failure:

pandas/tests/extension/category/test_categorical.py

@@ -64,7 +64,7 @@ def data_for_grouping():
 class TestDtype(base.BaseDtypeTests):
 
     def test_array_type_with_arg(self, data, dtype):
-        assert dtype.construct_array_type('foo') is Categorical
+        assert dtype.construct_array_type() is Categorical
 
 
 class TestInterface(base.BaseInterfaceTests):

pandas/tests/extension/decimal/array.py

@@ -16,13 +16,9 @@ class DecimalDtype(ExtensionDtype):
     na_value = decimal.Decimal('NaN')
 
     @classmethod
-    def construct_array_type(cls, array=None):
+    def construct_array_type(cls):
         """Return the array type associated with this dtype
 
-        Parameters
-        ----------
-        array : array-like, optional
-
         Returns
         -------
         type

pandas/tests/extension/decimal/test_decimal.py

@@ -102,7 +102,7 @@ def assert_frame_equal(self, left, right, *args, **kwargs):
 class TestDtype(BaseDecimal, base.BaseDtypeTests):
 
     def test_array_type_with_arg(self, data, dtype):
-        assert dtype.construct_array_type('foo') is DecimalArray
+        assert dtype.construct_array_type() is DecimalArray
 
 
 class TestInterface(BaseDecimal, base.BaseInterfaceTests):

pandas/tests/extension/json/array.py

@@ -33,13 +33,9 @@ class JSONDtype(ExtensionDtype):
         na_value = {}
 
     @classmethod
-    def construct_array_type(cls, array=None):
+    def construct_array_type(cls):
         """Return the array type associated with this dtype
 
-        Parameters
-        ----------
-        array : array-like, optional
-
         Returns
         -------
         type

pandas/tests/extension/json/test_json.py

@@ -109,7 +109,7 @@ def assert_frame_equal(self, left, right, *args, **kwargs):
 class TestDtype(BaseJSON, base.BaseDtypeTests):
 
     def test_array_type_with_arg(self, data, dtype):
-        assert dtype.construct_array_type('foo') is JSONArray
+        assert dtype.construct_array_type() is JSONArray
 
 
 class TestInterface(BaseJSON, base.BaseInterfaceTests):