More type check fixes

Author: salva

pandas/io/excel/_base.py

@@ -823,11 +823,11 @@ def _parse_sheet(
             # create an index map from the without-skiprows to the
             # original indexes.
             if skiprows is None:
-                ixmap = range(len(data))
+                ixmap = list(range(len(data)))
             elif is_integer(skiprows):
-                ixmap = range(skiprows, len(data))
+                ixmap = list(range(skiprows, len(data)))
             elif is_list_like(skiprows):
-                skiprows_set = set(skiprows)
+                skiprows_set = set(cast(Sequence[int], skiprows))
                 ixmap = list(ix for ix, _ in enumerate(data) if ix not in skiprows_set)
             elif callable(skiprows):
                 ixmap = list(ix for ix, _ in enumerate(data) if not skiprows(ix))
@@ -847,21 +847,21 @@ def _parse_sheet(
             elif isinstance(index_col, int):
                 index_col_set = {index_col}
             elif is_list_like(index_col):
-                index_col_set = set(cast(Sequence[int], index_col))
+                index_col_set = set(index_col)
             else:
                 raise ValueError(
                     "index_col must be a string, an integer or a list of integers"
                 )
             has_index = len(index_col_set) > 0
             has_index_names = False
 
-            header_list: list[int]
+            header_list: Sequence[int]
             if header is None:
                 header_list = []
-            elif is_integer(header):
+            elif isinstance(header, int):
                 header_list = [header]
             elif is_list_like(header):
-                header_list = cast(Sequence[int], header)
+                header_list = header
             else:
                 raise ValueError(
                     "header must be an integer or a list of integers"
@@ -897,7 +897,7 @@ def _parse_sheet(
 
                         if has_index:
                             header_name, _ = pop_header_name(data[row1],
-                                                             index_col)
+                                                             sorted(index_col_set))
                             if header_name:
                                 header_names.append(header_name)