CLN: remove construct_from_string from various

pandas/tests/extension/arrow/arrays.py

@@ -7,6 +7,7 @@
 """
 import copy
 import itertools
+from typing import Type
 
 import numpy as np
 import pyarrow as pa
@@ -29,14 +30,7 @@ class ArrowBoolDtype(ExtensionDtype):
     na_value = pa.NULL
 
     @classmethod
-    def construct_from_string(cls, string):
-        if string == cls.name:
-            return cls()
-        else:
-            raise TypeError(f"Cannot construct a '{cls.__name__}' from '{string}'")
-
-    @classmethod
-    def construct_array_type(cls):
+    def construct_array_type(cls) -> Type["ArrowBoolArray"]:
         """
         Return the array type associated with this dtype.
 
@@ -46,7 +40,8 @@ def construct_array_type(cls):
         """
         return ArrowBoolArray
 
-    def _is_boolean(self):
+    @property
+    def _is_boolean(self) -> bool:
         return True
 
 
@@ -59,14 +54,7 @@ class ArrowStringDtype(ExtensionDtype):
     na_value = pa.NULL
 
     @classmethod
-    def construct_from_string(cls, string):
-        if string == cls.name:
-            return cls()
-        else:
-            raise TypeError(f"Cannot construct a '{cls}' from '{string}'")
-
-    @classmethod
-    def construct_array_type(cls):
+    def construct_array_type(cls) -> Type["ArrowStringArray"]:
         """
         Return the array type associated with this dtype.
 

pandas/tests/extension/decimal/array.py

@@ -2,6 +2,7 @@
 import numbers
 import random
 import sys
+from typing import Type
 
 import numpy as np
 
@@ -26,7 +27,7 @@ def __repr__(self) -> str:
         return f"DecimalDtype(context={self.context})"
 
     @classmethod
-    def construct_array_type(cls):
+    def construct_array_type(cls) -> Type["DecimalArray"]:
         """
         Return the array type associated with this dtype.
 
@@ -36,15 +37,8 @@ def construct_array_type(cls):
         """
         return DecimalArray
 
-    @classmethod
-    def construct_from_string(cls, string):
-        if string == cls.name:
-            return cls()
-        else:
-            raise TypeError(f"Cannot construct a '{cls.__name__}' from '{string}'")
-
     @property
-    def _is_numeric(self):
+    def _is_numeric(self) -> bool:
         return True
 
 

pandas/tests/extension/json/array.py

@@ -16,6 +16,7 @@
 import random
 import string
 import sys
+from typing import Type
 
 import numpy as np
 
@@ -29,7 +30,7 @@ class JSONDtype(ExtensionDtype):
     na_value = UserDict()
 
     @classmethod
-    def construct_array_type(cls):
+    def construct_array_type(cls) -> Type["JSONArray"]:
         """
         Return the array type associated with this dtype.
 
@@ -39,13 +40,6 @@ def construct_array_type(cls):
         """
         return JSONArray
 
-    @classmethod
-    def construct_from_string(cls, string):
-        if string == cls.name:
-            return cls()
-        else:
-            raise TypeError(f"Cannot construct a '{cls.__name__}' from '{string}'")
-
 
 class JSONArray(ExtensionArray):
     dtype = JSONDtype()

pandas/tests/extension/list/array.py

@@ -6,6 +6,7 @@
 import numbers
 import random
 import string
+from typing import Type
 
 import numpy as np
 
@@ -21,7 +22,7 @@ class ListDtype(ExtensionDtype):
     na_value = np.nan
 
     @classmethod
-    def construct_array_type(cls):
+    def construct_array_type(cls) -> Type["ListArray"]:
         """
         Return the array type associated with this dtype.
 
@@ -31,13 +32,6 @@ def construct_array_type(cls):
         """
         return ListArray
 
-    @classmethod
-    def construct_from_string(cls, string):
-        if string == cls.name:
-            return cls()
-        else:
-            raise TypeError(f"Cannot construct a '{cls}' from '{string}'")
-
 
 class ListArray(ExtensionArray):
     dtype = ListDtype()