Fix typing

Author: phofl

pandas/core/internals/array_manager.py

@@ -374,7 +374,7 @@ def fillna(self: T, value, limit, inplace: bool, downcast) -> T:
     def astype(self: T, dtype, copy: bool = False, errors: str = "raise") -> T:
         return self.apply(astype_array_safe, dtype=dtype, copy=copy, errors=errors)
 
-    def convert(self: T, copy: bool) -> T:
+    def convert(self: T, copy: bool | None) -> T:
         def _convert(arr):
             if is_object_dtype(arr.dtype):
                 # extract PandasArray for tests that patch PandasArray._typ

pandas/core/internals/blocks.py

@@ -462,7 +462,9 @@ def convert(
         """
         if not copy and using_copy_on_write:
             result = self.copy(deep=False)
-            result._ref = weakref.ref(original_blocks[self.mgr_locs.as_array[0]])
+            result._ref = weakref.ref(  # type: ignore[attr-defined]
+                original_blocks[self.mgr_locs.as_array[0]]
+            )
             return [result]
         return [self.copy()] if copy else [self]
 
@@ -1982,7 +1984,9 @@ def convert(
             #  that is fixed, we short-circuit here.
             if using_copy_on_write:
                 result = self.copy(deep=False)
-                result._ref = weakref.ref(original_blocks[self.mgr_locs.as_array[0]])
+                result._ref = weakref.ref(  # type: ignore[attr-defined]
+                    original_blocks[self.mgr_locs.as_array[0]]
+                )
                 return [result]
             return [self]
 
@@ -2007,7 +2011,7 @@ def convert(
 
         res_values = ensure_block_shape(res_values, self.ndim)
         result = self.make_block(res_values)
-        result._ref = ref
+        result._ref = ref  # type: ignore[attr-defined]
         return [result]
 
 

pandas/core/internals/managers.py

@@ -455,7 +455,7 @@ def convert(self: T, copy: bool | None) -> T:
             using_copy_on_write=using_copy_on_write(),
             original_blocks=original_blocks,
         )
-        refs = [getattr(blk, "_ref", None) is not None for blk in mgr.blocks]
+        refs = [getattr(blk, "_ref", None) for blk in mgr.blocks]
         if any(ref is not None for ref in refs):
             mgr.refs = refs
             mgr.parent = self