Misc feedback

Author: sfc-gh-jkew

modin/core/storage_formats/base/query_compiler.py

@@ -110,7 +110,7 @@ def axis_setter(self, labels):
 
 class QCCoercionCost(IntEnum):  # noqa: PR01
     """
-    Coercion costs between Query Compilers.
+    Coercion costs between different Query Compiler backends.
 
     Coercion costs between query compilers can be expressed
     as integers in the range 0 to 1000, where 1000 is
@@ -125,7 +125,7 @@ class QCCoercionCost(IntEnum):  # noqa: PR01
 
     COST_IMPOSSIBLE means the coercion is effectively impossible, which can
     occur if the target system is unable to store the data as a result
-    of the coercion.
+    of the coercion. Currently this does not prevent coercion.
     """
 
     COST_ZERO = 0

modin/core/storage_formats/pandas/native_query_compiler.py

@@ -28,7 +28,9 @@
 )
 from modin.core.storage_formats.base.query_compiler import BaseQueryCompiler
 from modin.core.storage_formats.pandas.query_compiler_caster import QueryCompilerCaster
-from modin.utils import _inherit_docstrings
+from modin.utils import (
+    _inherit_docstrings,
+)
 
 _NO_REPARTITION_ON_NATIVE_EXECUTION_EXCEPTION_MESSAGE = (
     "Modin dataframes and series using native execution do not have partitions."

modin/core/storage_formats/pandas/query_compiler_caster.py

@@ -51,7 +51,7 @@ def __init__(self):
         self._qc_cls_set = set()
         self._result_type = None
 
-    def add_query_compiler(self, query_compiler):
+    def add_query_compiler(self, query_compiler: BaseQueryCompiler):
         """
         Add a query compiler to be considered for casting.