Add classmethod hash_iter

xycrypto/hashes.py

@@ -74,14 +74,19 @@ def hash(cls, data, **kwargs):
         return ctx.finalize()
 
     @classmethod
-    def hash_fileobj(cls, fileobj, *, chunk_size=0x100000, **kwargs):
-        """Return hash of data from file object."""
-
+    def hash_iter(cls, iterable, **kwargs):
         ctx = cls(**kwargs)
-        for chunk in iter(functools.partial(fileobj.read, chunk_size), b''):
+        for chunk in iterable:
             ctx.update(chunk)
         return ctx.finalize()
 
+    @classmethod
+    def hash_fileobj(cls, fileobj, *, chunk_size=0x100000, **kwargs):
+        """Return hash of data from file object."""
+
+        it = iter(functools.partial(fileobj.read, chunk_size), b'')
+        return cls.hash_iter(it, **kwargs)
+
     @classmethod
     def hash_file(cls, filepath, **kwargs):
         """Return hash of data from a file."""