add path info when error opening file

pola-rs · Jul 25, 2023 · 2238522 · 2238522
1 parent 700b965
commit 2238522
Showing 1 changed file with 6 additions and 1 deletion.
diff --git a/polars/polars-lazy/polars-plan/src/logical_plan/builder.rs b/polars/polars-lazy/polars-plan/src/logical_plan/builder.rs
@@ -253,7 +253,12 @@ impl LogicalPlanBuilder {
         try_parse_dates: bool,
     ) -> PolarsResult<Self> {
         let path = path.into();
-        let mut file = std::fs::File::open(&path)?;
+        let mut file = std::fs::File::open(&path).map_err(|e| {
+            polars_err!(
+                Io: "error open file: '{:?}', {:?}",
+                path, e
+            )
+        })?;
         let mut magic_nr = [0u8; 2];
         file.read_exact(&mut magic_nr)
             .map_err(|_| polars_err!(NoData: "empty csv"))?;