Add descriptions for some descriptors

src/descriptors/__init__.py

@@ -31,18 +31,26 @@
 from ._sasa import SASA
 
 AVAILABLE_DESCRIPTORS = [
+    # Human experts descriptors
     MolWt,
     MolAbsCharge,
     NumMaxAbsPartialCharge,
     NumMinAbsPartialCharge,
     RotBond,
     NumHeavyAtoms,
+
+    # High dimensional descriptors
+    # Topological fingerprint descriptors
     TopologicalTorsionFingerprint,
     MorganFingerPrint,
+    # Topological descriptors
     USR,
     USRCAT,
+    # Quantum descriptors
     MQNs,
+    # Physical descriptors on electrical properties and partition coefficients
     PEOE_VSA,
     SlogP_VSA,
+    # Topological descriptors
     Autocorr2D,
 ]

src/descriptors/descriptors.py

@@ -193,14 +193,15 @@ def __call__(self, mol):
 
 
 class USR(DescriptorsABC):
-    """USR descriptor, 12 continuous features"""
+    """Ultrafast Shape Descriptor, 12 continuous features"""
 
     def __call__(self, mol):
         return GetUSR(mol)
 
 
 class USRCAT(DescriptorsABC):
-    """USRCAT descriptor, 60 continuous features"""
+    """Ultrafast Shape Recognition with Credo Atom Types descriptor,
+    60 continuous features"""
 
     def __call__(self, mol):
         return GetUSRCAT(mol)
@@ -214,14 +215,14 @@ def __call__(self, mol):
 
 
 class MQNs(DescriptorsABC):
-    """MQNs descriptor, 42 discontinuous features"""
+    """Molecular Quantum Numbers descriptor, 42 discontinuous features"""
 
     def __call__(self, mol):
         return MQNs_(mol)
 
 
 class PEOE_VSA(DescriptorsABC):
-    """PEOE_VSA descriptor, 14 continuous features"""
+    """PEOE charge descriptor, 14 continuous features"""
 
     def __call__(self, mol):
         return PEOE_VSA_(mol)
@@ -242,5 +243,7 @@ def __call__(self, mol):
 
 
 class Autocorr2D(DescriptorsABC):
+    """Autocorrelation 2D descriptor, descriptor of topological
+    molecular structure"""
     def __call__(self, mol):
         return CalcAUTOCORR2D(mol)