only run modin in ci

.github/workflows/pytest.yml

@@ -28,5 +28,7 @@ jobs:
           key: ${{ runner.os }}-build-${{ matrix.python-version }}
       - name: install-reqs
         run: python -m pip install --upgrade tox virtualenv setuptools pip -r requirements-dev.txt
+      - name: install-modin
+        run: python -m pip install --upgrade modin
       - name: Run pytest
         run: pytest tests --cov=narwhals --cov=tests --cov-fail-under=50

requirements-dev.txt

@@ -1,5 +1,4 @@
 covdefaults
-modin[dask]
 pandas
 polars
 pre-commit

tests/test_common.py

@@ -1,5 +1,6 @@
 from __future__ import annotations
 
+import os
 import warnings
 from typing import Any
 
@@ -14,11 +15,17 @@
 df_pandas = pd.DataFrame({"a": [1, 3, 2], "b": [4, 4, 6], "z": [7.0, 8, 9]})
 df_polars = pl.DataFrame({"a": [1, 3, 2], "b": [4, 4, 6], "z": [7.0, 8, 9]})
 df_lazy = pl.LazyFrame({"a": [1, 3, 2], "b": [4, 4, 6], "z": [7.0, 8, 9]})
-with warnings.catch_warnings():
-    warnings.filterwarnings("ignore", category=UserWarning)
-    df_mpd = pd.DataFrame(
-        pd.DataFrame({"a": [1, 3, 2], "b": [4, 4, 6], "z": [7.0, 8, 9]})
-    )
+
+if os.environ.get("CI", None):
+    import modin as mpd
+
+    with warnings.catch_warnings():
+        warnings.filterwarnings("ignore", category=UserWarning)
+        df_mpd = mpd.DataFrame(
+            pd.DataFrame({"a": [1, 3, 2], "b": [4, 4, 6], "z": [7.0, 8, 9]})
+        )
+else:
+    df_mpd = df_pandas.copy()
 
 
 @pytest.mark.parametrize(