Added comments [skip ci]

Author: ankane

pgvector/halfvec.py

@@ -15,6 +15,7 @@ def __init__(self, value: list[float] | tuple[float, ...] | np.ndarray) -> None:
         if value.ndim != 1:
             raise ValueError('expected ndim to be 1')
 
+        # atleast_1d for ty
         self._value = np.atleast_1d(value)
 
     def __repr__(self) -> str:

pgvector/vector.py

@@ -15,6 +15,7 @@ def __init__(self, value: list[float] | tuple[float, ...] | np.ndarray) -> None:
         if value.ndim != 1:
             raise ValueError('expected ndim to be 1')
 
+        # atleast_1d for ty
         self._value = np.atleast_1d(value)
 
     def __repr__(self) -> str: