From dc8285ffbb34532b227230ea79517e4ee3eb0abb Mon Sep 17 00:00:00 2001
From: Abu Jabar Mubarak <139158216+abujabarmubarak@users.noreply.github.com>
Date: Mon, 28 Jul 2025 23:19:07 +0530
Subject: [PATCH 1/3] Handle engine='polars'

---
 pandas/io/parsers/readers.py | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/pandas/io/parsers/readers.py b/pandas/io/parsers/readers.py
index 4fbd71ed03662..8660b9e498d4a 100644
--- a/pandas/io/parsers/readers.py
+++ b/pandas/io/parsers/readers.py
@@ -679,6 +679,24 @@ def _read(
             kwds["parse_dates"] = False
         else:
             kwds["parse_dates"] = True
+    # 🆕 Handle engine='polars'
+    if kwds.get("engine") == "polars":
+        try:
+            import polars as pl
+        except ImportError:
+            raise ImportError(
+                "Polars is not installed. Please install it with 'pip install polars'."
+            )
+
+        pl_args = {}
+        if "nrows" in kwds:
+            pl_args["n_rows"] = kwds["nrows"]
+        if "encoding" in kwds:
+            pl_args["encoding"] = kwds["encoding"]
+
+        df = pl.read_csv(filepath_or_buffer, **pl_args)
+        return df.to_pandas()
+
 
     # Extract some of the arguments (pass chunksize on).
     iterator = kwds.get("iterator", False)

From d39a26b6d07ffac9cfdd62c771b3850ab34dd5bc Mon Sep 17 00:00:00 2001
From: Abu Jabar Mubarak <139158216+abujabarmubarak@users.noreply.github.com>
Date: Mon, 28 Jul 2025 23:23:05 +0530
Subject: [PATCH 2/3] Update engine validation

---
 pandas/io/parsers/readers.py | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/pandas/io/parsers/readers.py b/pandas/io/parsers/readers.py
index 8660b9e498d4a..53d06272a771a 100644
--- a/pandas/io/parsers/readers.py
+++ b/pandas/io/parsers/readers.py
@@ -1809,6 +1809,9 @@ def _refine_defaults_read(
         kwds["delimiter"] = delimiter
 
     if engine is not None:
+        if engine not in ["c", "python", "pyarrow", "polars"]:
+            raise ValueError(f"Unknown engine: {engine}")
+        kwds["engine"] = engine
         kwds["engine_specified"] = True
     else:
         kwds["engine"] = "c"

From c9df57728823a7a517d21b859d00f812a2a7103a Mon Sep 17 00:00:00 2001
From: Abu Jabar Mubarak <139158216+abujabarmubarak@users.noreply.github.com>
Date: Mon, 28 Jul 2025 23:31:12 +0530
Subject: [PATCH 3/3] TEST: Add engine='polars' support test for read_csv

---
 pandas/io/parsers/test_read_csv_polars.py | 12 ++++++++++++
 1 file changed, 12 insertions(+)
 create mode 100644 pandas/io/parsers/test_read_csv_polars.py

diff --git a/pandas/io/parsers/test_read_csv_polars.py b/pandas/io/parsers/test_read_csv_polars.py
new file mode 100644
index 0000000000000..2647915d75782
--- /dev/null
+++ b/pandas/io/parsers/test_read_csv_polars.py
@@ -0,0 +1,12 @@
+import pytest
+
+def test_read_csv_with_polars(tmp_path):
+    pl = pytest.importorskip("polars")
+    pd = pytest.importorskip("pandas")
+
+    file = tmp_path / "data.csv"
+    file.write_text("a,b\n1,2\n3,4")
+
+    df = pd.read_csv(file, engine="polars")
+    assert df.shape == (2, 2)
+    assert list(df.columns) == ["a", "b"]