add polars

Author: davidkhala

.gitignore

@@ -1 +1,3 @@
-.idea
+.idea
+dist
+uv.lock

format/.gitignore

@@ -1 +1,5 @@
-# pypi `davidkhala.data.frame`
+# pypi `davidkhala.data.frame`
+
+extras
+- [Pandas](https://github.com/davidkhala/py-data/wiki/Pandas)
+- [polars](https://github.com/davidkhala/data/blob/main/frame/polars.md)

frame/.gitignore

@@ -11,7 +11,7 @@ pandas = ["pandas"]
 polars = ["polars"]
 
 [dependency-groups]
-dev = ["pytest", "duckdb"]
+dev = ["pytest", "duckdb", "fsspec"]
 
 [tool.hatch.build.targets.sdist]
 include = ["davidkhala"]

frame/README.md

@@ -0,0 +1,29 @@
+import unittest
+from polars import DataFrame, read_csv
+import datetime
+from fsspec import filesystem
+class GettingStarted(unittest.TestCase):
+    def test_rw(self):
+        df = DataFrame(
+            {
+                "name": ["Alice Archer", "Ben Brown", "Chloe Cooper", "Daniel Donovan"],
+                "birthdate": [
+                    datetime.date(1997, 1, 10),
+                    datetime.date(1985, 2, 15),
+                    datetime.date(1983, 3, 22),
+                    datetime.date(1981, 4, 30),
+                ],
+                "weight": [57.9, 72.5, 53.6, 83.1],  # (kg)
+                "height": [1.56, 1.77, 1.65, 1.75],  # (m)
+            }
+        )
+        file_path = "artifacts/output.csv"
+        filesystem('file').touch(file_path)
+
+        df.write_csv(file_path)
+        df_csv = read_csv(file_path, try_parse_dates=True)
+        print(df_csv)
+
+
+if __name__ == '__main__':
+    unittest.main()