update changelog

CHANGELOG.md

@@ -10,6 +10,10 @@ Keep it human-readable, your future self will thank you!
 
 ## [Unreleased](https://github.com/ecmwf/anemoi-utils/transform/0.0.5...HEAD/compare/0.1.0...HEAD)
 
+### Added
+
+- Add regrid filter
+
 ## [0.1.0](https://github.com/ecmwf/anemoi-utils/transform/0.0.5...HEAD/compare/0.0.8...0.1.0) - 2024-11-18
 
 ## [0.0.8](https://github.com/ecmwf/anemoi-utils/transform/0.0.5...HEAD/compare/0.0.5...0.0.8) - 2024-10-26

src/anemoi/transform/filters/rescale.py

@@ -11,9 +11,9 @@
 from . import filter_registry
 from .base import SimpleFilter
 
+
 class Rescale(SimpleFilter):
-    """A filter to rescale a parameter from a scale and an offset, and back.
-    """
+    """A filter to rescale a parameter from a scale and an offset, and back."""
 
     def __init__(
         self,
@@ -27,11 +27,7 @@ def __init__(
         self.param = param
 
     def forward(self, data):
-        return self._transform(
-            data,
-            self.forward_transform,
-            self.param        
-            )
+        return self._transform(data, self.forward_transform, self.param)
 
     def backward(self, data):
         return self._transform(
@@ -46,26 +42,21 @@ def forward_transform(self, x):
         rescaled = x.to_numpy() * self.scale + self.offset
 
         yield self.new_field_from_numpy(rescaled, template=x, param=self.param)
-    
+
     def backward_transform(self, x):
         """ax+b to x"""
 
-        descaled = (x.to_numpy() - self.offset)/ self.scale 
+        descaled = (x.to_numpy() - self.offset) / self.scale
 
         yield self.new_field_from_numpy(descaled, template=x, param=self.param)
 
+
 class Convert(Rescale):
-    """A filter to convert a parameter in a given unit to another unit, and back.
-    """
+    """A filter to convert a parameter in a given unit to another unit, and back."""
 
-    def __init__(
-        self,
-        *,
-        unit_in,
-        unit_out,
-        param
-    ):
+    def __init__(self, *, unit_in, unit_out, param):
         from cfunits import Units
+
         u0 = Units(unit_in)
         u1 = Units(unit_out)
         x1, x2 = 0.0, 1.0

tests/test_filters.py

@@ -8,16 +8,16 @@
 # nor does it submit to any jurisdiction.
 
 
-from anemoi.transform.filters.rescale import Rescale, Convert
 import earthkit.data as ekd
 from pytest import approx
 
+from anemoi.transform.filters.rescale import Convert
+from anemoi.transform.filters.rescale import Rescale
+
 
 def test_rescale():
     # rescale from K to °C
-    temp = ekd.from_source(
-        "mars", {"param": "2t", "levtype": "sfc", "dates": ["2023-11-17 00:00:00"]}
-    )
+    temp = ekd.from_source("mars", {"param": "2t", "levtype": "sfc", "dates": ["2023-11-17 00:00:00"]})
     fieldlist = temp.to_fieldlist()
     k_to_deg = Rescale(scale=1.0, offset=-273.15, param="2t")
     rescaled = k_to_deg.forward(fieldlist)
@@ -31,9 +31,7 @@ def test_rescale():
     deg_to_far = Rescale(scale=9 / 5, offset=32, param="2t")
     rescaled_farheneit = deg_to_far.forward(rescaled)
     assert rescaled_farheneit[0].values.min() == 9 / 5 * rescaled[0].values.min() + 32
-    assert rescaled_farheneit[0].values.std() == approx(
-        (9 / 5) * rescaled[0].values.std()
-    )
+    assert rescaled_farheneit[0].values.std() == approx((9 / 5) * rescaled[0].values.std())
     # rescale from F to K
     rescaled_back = k_to_deg.backward(deg_to_far.backward(rescaled_farheneit))
     assert rescaled_back[0].values.min() == temp.values.min()
@@ -42,9 +40,7 @@ def test_rescale():
 
 def test_convert():
     # rescale from K to °C
-    temp = ekd.from_source(
-        "mars", {"param": "2t", "levtype": "sfc", "dates": ["2023-11-17 00:00:00"]}
-    )
+    temp = ekd.from_source("mars", {"param": "2t", "levtype": "sfc", "dates": ["2023-11-17 00:00:00"]})
     fieldlist = temp.to_fieldlist()
     k_to_deg = Convert(unit_in="K", unit_out="degC", param="2t")
     rescaled = k_to_deg.forward(fieldlist)