[Feature] PEPPER in enviPath (#332)

Co-authored-by: Tim Lorsbach <tim@lorsba.ch>
Reviewed-on: enviPath/enviPy#332

pepper/impl/descriptors.py

@@ -0,0 +1,60 @@
+from abc import ABC, abstractmethod
+from typing import List
+
+from mordred import Calculator, descriptors
+from padelpy import from_smiles
+from rdkit import Chem
+
+
+class Descriptor(ABC):
+    @abstractmethod
+    def get_molecule_descriptors(self, molecule: str) -> List[float | int] | None:
+        pass
+
+    @abstractmethod
+    def get_descriptor_names(self) -> List[str]:
+        pass
+
+
+class Mordred(Descriptor):
+    calc = Calculator(descriptors, ignore_3D=True)
+
+    def get_molecule_descriptors(self, molecule: str) -> List[float | int] | None:
+        mol = Chem.MolFromSmiles(molecule)
+        res = list(self.calc(mol))
+        return res
+
+    def get_descriptor_names(self) -> List[str]:
+        return [f"Mordred_{i}" for i in range(len(self.calc.descriptors))]
+
+
+class PaDEL(Descriptor):
+    calc = Calculator(descriptors)
+
+    def get_molecule_descriptors(self, molecule: str) -> List[float | int] | None:
+        try:
+            padel_descriptors = from_smiles(molecule, threads=1)
+        except RuntimeError:
+            return []
+
+        formatted = []
+        for k, v in padel_descriptors.items():
+            try:
+                formatted.append(float(v))
+            except ValueError:
+                formatted.append(0.0)
+
+        return formatted
+
+    def get_descriptor_names(self) -> List[str]:
+        return [f"PaDEL_{i}" for i in range(1875)]
+
+
+if __name__ == "__main__":
+    mol = "CC1=CC(O)=CC=C1[N+](=O)[O-]"
+
+    m = Mordred()
+    print(list(m.get_molecule_descriptors(mol)))
+
+    p = PaDEL()
+    print(list(p.get_molecule_descriptors(mol)))