fix hindcasts

src/anemoi/utils/hindcasts.py

@@ -27,16 +27,16 @@ def __init__(self, reference_dates, years=20):
 
         self.reference_dates = reference_dates
 
-        if isinstance(years, list):
-            self.years = years
-        else:
-            self.years = range(1, years + 1)
+        assert isinstance(years, int), f"years must be an integer, got {years}"
+        assert years > 0, f"years must be greater than 0, got {years}"
+        self.years = years
 
     def __iter__(self):
         for reference_date in self.reference_dates:
-            for year in self.years:
-                if reference_date.month == 2 and reference_date.day == 29:
-                    date = datetime.datetime(reference_date.year - year, 2, 28)
-                else:
-                    date = datetime.datetime(reference_date.year - year, reference_date.month, reference_date.day)
+            year, month, day = reference_date.year, reference_date.month, reference_date.day
+            if (month, day) == (2, 29):
+                day = 28
+
+            for i in range(1, self.years + 1):
+                date = datetime.datetime(year - i, month, day)
                 yield (date, reference_date)

src/anemoi/utils/registry.py

@@ -30,6 +30,9 @@ def __call__(self, factory):
         return factory
 
 
+_BY_KIND = {}
+
+
 class Registry:
     """A registry of factories"""
 
@@ -39,6 +42,11 @@ def __init__(self, package, key="_type"):
         self.registered = {}
         self.kind = package.split(".")[-1]
         self.key = key
+        _BY_KIND[self.kind] = self
+
+    @classmethod
+    def lookup_kind(cls, kind: str):
+        return _BY_KIND.get(kind)
 
     def register(self, name: str, factory: callable = None):
 
@@ -47,14 +55,19 @@ def register(self, name: str, factory: callable = None):
 
         self.registered[name] = factory
 
+    # def registered(self, name: str):
+    #     return name in self.registered
+
     def _load(self, file):
         name, _ = os.path.splitext(file)
         try:
             importlib.import_module(f".{name}", package=self.package)
         except Exception:
             LOG.warning(f"Error loading filter '{self.package}.{name}'", exc_info=True)
 
-    def lookup(self, name: str) -> callable:
+    def lookup(self, name: str, *, return_none=False) -> callable:
+
+        # print('✅✅✅✅✅✅✅✅✅✅✅✅✅', name, self.registered)
         if name in self.registered:
             return self.registered[name]
 
@@ -87,8 +100,12 @@ def lookup(self, name: str) -> callable:
                 self.registered[name] = entry_point.load()
 
         if name not in self.registered:
+            if return_none:
+                return None
+
             for e in self.registered:
                 LOG.info(f"Registered: {e}")
+
             raise ValueError(f"Cannot load '{name}' from {self.package}")
 
         return self.registered[name]
@@ -97,8 +114,8 @@ def create(self, name: str, *args, **kwargs):
         factory = self.lookup(name)
         return factory(*args, **kwargs)
 
-    def __call__(self, name: str, *args, **kwargs):
-        return self.create(name, *args, **kwargs)
+    # def __call__(self, name: str, *args, **kwargs):
+    #     return self.create(name, *args, **kwargs)
 
     def from_config(self, config, *args, **kwargs):
         if isinstance(config, str):
@@ -125,5 +142,5 @@ def from_config(self, config, *args, **kwargs):
             return self.create(key, *args, value, **kwargs)
 
         raise ValueError(
-            f"Entry '{config}' must either be a string, a dictionray with a single entry, or a dictionary with a '{self.key}' key"
+            f"Entry '{config}' must either be a string, a dictionary with a single entry, or a dictionary with a '{self.key}' key"
         )

tests/test_dates.py

@@ -83,36 +83,6 @@ def test_date_hindcast_1():
     assert len(list(d)) == 60
 
 
-def test_date_hindcast_2():
-    d = _(
-        """
-        - name: hindcast
-          reference_dates:
-            start: 2023-01-01
-            end: 2023-01-03
-            frequency: 24
-          years: [2018, 2019, 2020, 2021]
-    """
-    )
-    assert len(list(d)) == 12
-
-
-def test_date_hindcast_3():
-    d = _(
-        """
-        - name: hindcast
-          reference_dates:
-            start: 2022-12-25 00:00:00
-            end: 2022-12-31 12:00:00
-            frequency: 12h
-            day_of_week: tuesday
-          years: [2018, 2019, 2020, 2021]
-    """
-    )
-    print(list(d))
-    assert len(list(d)) == 8
-
-
 if __name__ == "__main__":
     for name, obj in list(globals().items()):
         if name.startswith("test_") and callable(obj):