fix: support passing though dm, nicer typing

.pre-commit-config.yaml

@@ -24,13 +24,13 @@ repos:
   - id: end-of-file-fixer
 
 - repo: https://github.com/astral-sh/ruff-pre-commit
-  rev: "v0.1.5"
+  rev: "v0.1.6"
   hooks:
     - id: ruff
       args: ["--fix", "--show-fixes"]
 
 - repo: https://github.com/pre-commit/mirrors-mypy
-  rev: v1.6.1
+  rev: v1.7.1
   hooks:
   - id: mypy
     files: '^src/decaylanguage/(decay|dec|utils)/'

src/decaylanguage/dec/dec.py

@@ -55,7 +55,7 @@
 
 from .. import data
 from .._compat.typing import Self
-from ..decay.decay import _expand_decay_modes
+from ..decay.decay import DecayModeDict, _expand_decay_modes
 from ..utils import charge_conjugate_name
 from .enums import PhotosEnum
 
@@ -747,7 +747,7 @@ def list_decay_modes(self, mother: str, pdg_name: bool = False) -> list[list[str
 
     def _decay_mode_details(
         self, decay_mode: Tree, display_photos_keyword: bool = True
-    ) -> tuple[float, list[str], str, str | list[str | Any]]:
+    ) -> DecayModeDict:
         """
         Parse a decay mode (Tree instance)
         and return the relevant bits of information in it.
@@ -768,7 +768,9 @@ def _decay_mode_details(
         if display_photos_keyword and list(decay_mode.find_data("photos")):
             model = "PHOTOS " + model
 
-        return (bf, fsp_names, model, model_params)
+        return DecayModeDict(
+            bf=bf, fs=fsp_names, model=model, model_params=model_params
+        )
 
     def print_decay_modes(
         self,
@@ -864,11 +866,13 @@ def print_decay_modes(
 
         ls_dict = {}
         for dm in dms:
-            bf, fsp_names, model, model_params = self._decay_mode_details(
-                dm, display_photos_keyword
+            dmdict = self._decay_mode_details(dm, display_photos_keyword)
+            model_params = [str(i) for i in dmdict["model_params"]]
+            ls_dict[dmdict["bf"]] = (
+                dmdict["fs"],
+                dmdict["model"],
+                model_params,
             )
-            model_params = [str(i) for i in model_params]
-            ls_dict[bf] = (fsp_names, model, model_params)
 
         dec_details = list(ls_dict.values())
         ls_attrs_aligned = list(
@@ -937,7 +941,7 @@ def build_decay_chains(
         self,
         mother: str,
         stable_particles: list[str] | set[str] | tuple[str] | tuple[()] = (),
-    ) -> dict[str, list[dict[str, float | str | list[Any]]]]:
+    ) -> dict[str, list[DecayModeDict]]:
         """
         Iteratively build the entire decay chains of a given mother particle,
         optionally considering, on the fly, certain particles as stable.
@@ -992,14 +996,12 @@ def build_decay_chains(
         >>> p.build_decay_chains('D+', stable_particles=['pi0'])    # doctest: +SKIP
         {'D+': [{'bf': 1.0, 'fs': ['K-', 'pi+', 'pi+', 'pi0'], 'model': 'PHSP', 'model_params': ''}]}
         """
-        keys = ("bf", "fs", "model", "model_params")
 
         info = []
         for dm in self._find_decay_modes(mother):
-            list_dm_details = self._decay_mode_details(dm, display_photos_keyword=False)
-            d = dict(zip(keys, list_dm_details))
+            d = self._decay_mode_details(dm, display_photos_keyword=False)
 
-            for i, fs in enumerate(d["fs"]):  # type: ignore[arg-type, var-annotated]
+            for i, fs in enumerate(d["fs"]):
                 if fs in stable_particles:
                     continue
 
@@ -1008,14 +1010,15 @@ def build_decay_chains(
                     # if fs does not have decays defined in the parsed file
                     # _n_dms = len(self._find_decay_modes(fs))
 
+                    assert isinstance(fs, str)
                     _info = self.build_decay_chains(fs, stable_particles)
                     d["fs"][i] = _info  # type: ignore[index]
                 except DecayNotFound:
                     pass
 
             info.append(d)
 
-        return {mother: info}  # type: ignore[dict-item]
+        return {mother: info}
 
     def __repr__(self) -> str:
         if self._parsed_dec_file is not None:

src/decaylanguage/decay/decay.py

@@ -7,15 +7,16 @@
 from __future__ import annotations
 
 from collections import Counter
+from collections.abc import Sequence
 from copy import deepcopy
 from itertools import product
-from typing import TYPE_CHECKING, Any, Dict, Iterable, Iterator, List, Union
+from typing import TYPE_CHECKING, Any, Dict, Iterable, Iterator, List
 
 from particle import PDGID, ParticleNotFound
 from particle.converters import EvtGenName2PDGIDBiMap
 from particle.exceptions import MatchingIDNotFound
 
-from .._compat.typing import Self
+from .._compat.typing import Self, TypedDict
 from ..utils import DescriptorFormat, charge_conjugate_name
 
 if TYPE_CHECKING:
@@ -24,6 +25,16 @@
     CounterStr = Counter
 
 
+class DecayModeDict(TypedDict):
+    bf: float
+    fs: Sequence[str | DecayChainDict]
+    model: str
+    model_params: str | Sequence[str | Any]
+
+
+DecayChainDict = Dict[str, List[DecayModeDict]]
+
+
 class DaughtersDict(CounterStr):
     """
     Class holding a decay final state as a dictionary.
@@ -187,8 +198,12 @@ class DecayMode:
     def __init__(
         self,
         bf: float = 0,
-        daughters: None
-        | (DaughtersDict | dict[str, int] | list[str] | tuple[str] | str) = None,
+        daughters: DaughtersDict
+        | dict[str, int]
+        | list[str]
+        | tuple[str]
+        | str
+        | None = None,
         **info: Any,
     ) -> None:
         """
@@ -241,6 +256,8 @@ def __init__(
         True
         """
         self.bf = bf
+        if daughters is None and "fs" in info:
+            self.daughters = DaughtersDict(info.pop("fs"))
         self.daughters = DaughtersDict(daughters)
 
         self.metadata: dict[str, str | None] = {"model": "", "model_params": ""}
@@ -249,7 +266,7 @@ def __init__(
     @classmethod
     def from_dict(
         cls,
-        decay_mode_dict: dict[str, int | float | str | list[str]],
+        decay_mode_dict: DecayModeDict,
     ) -> Self:
         """
         Constructor from a dictionary of the form
@@ -285,13 +302,10 @@ def from_dict(
         dm = deepcopy(decay_mode_dict)
 
         # Ensure the input dict has the 2 required keys 'bf' and 'fs'
-        try:
-            bf = dm.pop("bf")
-            daughters = dm.pop("fs")
-        except KeyError as e:
-            raise RuntimeError("Input not in the expected format!") from e
+        if not dm.keys() >= {"bf", "fs"}:
+            raise RuntimeError("Input not in the expected format! Needs 'bf' and 'fs'")
 
-        return cls(bf=bf, daughters=daughters, **dm)  # type: ignore[arg-type]
+        return cls(**dm)
 
     @classmethod
     def from_pdgids(
@@ -436,10 +450,6 @@ def __str__(self) -> str:
         return repr(self)
 
 
-DecayModeDict = Dict[str, Union[float, str, List[Any]]]
-DecayChainDict = Dict[str, List[DecayModeDict]]
-
-
 def _has_no_subdecay(ds: list[Any]) -> bool:
     """
     Internal function to check whether the input list
@@ -894,9 +904,9 @@ def _print(
             for i_decay in decay_dict[mother]:
                 print(prefix, arrow if depth > 0 else "", mother, sep="")  # noqa: T201
                 fsps = i_decay["fs"]
-                n = len(list(fsps))  # type: ignore[arg-type]
+                n = len(list(fsps))
                 depth += 1
-                for j, fsp in enumerate(fsps):  # type: ignore[arg-type]
+                for j, fsp in enumerate(fsps):
                     prefix = bar if (link and depth > 1) else ""
                     if last:
                         prefix = prefix + " " * indent * (depth - 1) + " "

tests/dec/test_dec.py

@@ -413,7 +413,12 @@ def test_decay_mode_details():
     p.parse()
 
     tree_Dp = p._find_decay_modes("D+")[0]
-    output = (1.0, ["K-", "pi+", "pi+", "pi0"], "PHSP", "")
+    output = {
+        "bf": 1.0,
+        "fs": ["K-", "pi+", "pi+", "pi0"],
+        "model": "PHSP",
+        "model_params": "",
+    }
     assert p._decay_mode_details(tree_Dp, display_photos_keyword=False) == output