use rdata as a driver for 'rds' files (#231)

* add rdata driver

* update tests

* install qs

* importorskip in test

Author: isabelizimm

.github/workflows/ci.yml

@@ -91,6 +91,7 @@ jobs:
         run: |
           python -m pip install --upgrade pip
           python -m pip install -r requirements/dev.txt
+          python -m pip install rdata
           python -m pip install -e .[test]
 
       - name: run Posit Connect

pins/drivers.py

@@ -121,6 +121,16 @@ def load_data(
                 " Use `.pin_download()` to download the file."
             )
 
+        elif meta.type == "rds":
+            try:
+                import rdata
+
+                return rdata.read_rds(f)
+            except ModuleNotFoundError:
+                raise ModuleNotFoundError(
+                    "Install the 'rdata' package to attempt to convert 'rds' files into Python objects."
+                )
+
     raise NotImplementedError(f"No driver for type {meta.type}")
 
 

pins/tests/test_compat.py

@@ -153,9 +153,13 @@ def test_compat_pin_read(board):
     assert src_df.equals(dst_df)
 
 
-def test_compat_pin_read_supported(board):
-    with pytest.raises(NotImplementedError):
-        board.pin_read("df_rds")
+def test_compat_pin_read_supported_rds(board):
+    pytest.importorskip("rdata")
+    import pandas as pd
+
+    src_df = board.pin_read("df_rds")
+
+    assert isinstance(src_df, pd.DataFrame)
 
 
 # pin_write ----