BUG: ValueError when printing a DataFrame with DataFrame in its attrs (#60459)

* Add test

* replace concat with np

* Revert "replace concat with np"

This reverts commit b48fc35.

* Revert "Revert "replace concat with np""

This reverts commit 6b45ac5.

* try fixing mypy error

* Add whatsnew

---------

Co-authored-by: Matthew Roeschke <[email protected]>

Author: yuanx749

doc/source/whatsnew/v3.0.0.rst

@@ -797,6 +797,7 @@ Other
 - Bug in :meth:`read_csv` where chained fsspec TAR file and ``compression="infer"`` fails with ``tarfile.ReadError`` (:issue:`60028`)
 - Bug in Dataframe Interchange Protocol implementation was returning incorrect results for data buffers' associated dtype, for string and datetime columns (:issue:`54781`)
 - Bug in ``Series.list`` methods not preserving the original :class:`Index`. (:issue:`58425`)
+- Bug in printing a :class:`DataFrame` with a :class:`DataFrame` stored in :attr:`DataFrame.attrs` raised a ``ValueError`` (:issue:`60455`)
 
 .. ***DO NOT USE THIS SECTION***
 

pandas/io/formats/format.py

@@ -669,9 +669,9 @@ def _truncate_horizontally(self) -> None:
         assert self.max_cols_fitted is not None
         col_num = self.max_cols_fitted // 2
         if col_num >= 1:
-            left = self.tr_frame.iloc[:, :col_num]
-            right = self.tr_frame.iloc[:, -col_num:]
-            self.tr_frame = concat((left, right), axis=1)
+            _len = len(self.tr_frame.columns)
+            _slice = np.hstack([np.arange(col_num), np.arange(_len - col_num, _len)])
+            self.tr_frame = self.tr_frame.iloc[:, _slice]
 
             # truncate formatter
             if isinstance(self.formatters, (list, tuple)):
@@ -682,7 +682,7 @@ def _truncate_horizontally(self) -> None:
         else:
             col_num = cast(int, self.max_cols)
             self.tr_frame = self.tr_frame.iloc[:, :col_num]
-        self.tr_col_num = col_num
+        self.tr_col_num: int = col_num
 
     def _truncate_vertically(self) -> None:
         """Remove rows, which are not to be displayed.

pandas/tests/io/formats/test_format.py

@@ -129,6 +129,13 @@ def test_repr_truncation_preserves_na(self):
         with option_context("display.max_rows", 2, "display.show_dimensions", False):
             assert repr(df) == "       a\n0   <NA>\n..   ...\n9   <NA>"
 
+    def test_repr_truncation_dataframe_attrs(self):
+        # GH#60455
+        df = DataFrame([[0] * 10])
+        df.attrs["b"] = DataFrame([])
+        with option_context("display.max_columns", 2, "display.show_dimensions", False):
+            assert repr(df) == "   0  ...  9\n0  0  ...  0"
+
     def test_max_colwidth_negative_int_raises(self):
         # Deprecation enforced from:
         # https://github.com/pandas-dev/pandas/issues/31532