fix: catch ImportError in get_progress_bar and remove matplotlib skip in tests

Author: chalmerlowe

packages/google-cloud-bigquery/google/cloud/bigquery/_tqdm_helpers.py

@@ -70,7 +70,7 @@ def get_progress_bar(progress_bar_type, description, total, unit):
             )
         elif progress_bar_type == "tqdm_gui":
             return tqdm.tqdm_gui(desc=description, total=total, unit=unit)
-    except (KeyError, TypeError):  # pragma: NO COVER
+    except (KeyError, TypeError, ImportError):  # pragma: NO COVER
         # Protect ourselves from any tqdm errors. In case of
         # unexpected tqdm behavior, just fall back to showing
         # no progress bar.

packages/google-cloud-bigquery/tests/unit/test_table.py

@@ -4092,7 +4092,6 @@ def test_to_dataframe_no_tqdm(self):
 
     def test_to_dataframe_tqdm_error(self):
         pytest.importorskip("pandas")
-        pytest.importorskip("matplotlib")
         tqdm = pytest.importorskip("tqdm")
         mock.patch("tqdm.tqdm_gui", new=None)
         mock.patch("tqdm.notebook.tqdm", new=None)