From 2238522b27fc86c4dcc9c6efc2cb2d1e7060f9c5 Mon Sep 17 00:00:00 2001
From: rikkaka <793329010@qq.com>
Date: Tue, 25 Jul 2023 23:47:04 +0800
Subject: [PATCH] add path info when error opening file

---
 polars/polars-lazy/polars-plan/src/logical_plan/builder.rs | 7 ++++++-
 1 file changed, 6 insertions(+), 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
index c346b0b717a4..5561f42e10f2 100644
--- 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"))?;