Update README.md

README.md

@@ -764,23 +764,24 @@ Boundary                   | Cross-sections
 
 Stream and instantiate the VMEC ideal MHD equilibria:
 ```python
-import datasets
 from constellaration.mhd import vmec_utils
-from constellaration.geometry import surface_rz_fourier
 
-vmec_wout_ds = datasets.load_dataset("proxima-fusion/constellaration", "vmecpp_ideal_mhd_equilibria", streaming=True)["train"]
-vmec_wout_ds = vmec_wout_ds.filter(lambda row: row["vmecpp_wout_json"] is not None)
+wout_ds = datasets.load_dataset(
+    "proxima-fusion/constellaration",
+    "vmecpp_wout",
+    split="train",
+    streaming=True,
+)
 
-row = next(vmec_wout_ds.__iter__())
+row = next(wout_ds.__iter__())
 
-vmecpp_wout_json = row["vmecpp_wout_json"]
+vmecpp_wout_json = row["json"]
 vmecpp_wout = vmec_utils.VmecppWOut.model_validate_json(vmecpp_wout_json)
+```
 
 # Fetch corresponding boundary
-full_json_ds = datasets.load_dataset("proxima-fusion/constellaration", "full_json")["train"]
-full_json_df = full_json_ds.to_pandas().set_index("plasma_config_id")
 plasma_config_id = row["plasma_config_id"]
-boundary_json = full_json_df.loc[plasma_config_id]["boundary.json"]
+boundary_json = pandas_ds.loc[plasma_config_id]["boundary.json"]
 boundary = surface_rz_fourier.SurfaceRZFourier.model_validate_json(boundary_json)
 ```
 Plot flux surfaces: