Move naming to Generator (reflect reality)

Closes https://github.com/datpy/merkle-tree-stream/issues/4.

CHANGELOG.rst

@@ -1,3 +1,12 @@
+Merkle_Tree_Stream 0.0.1a3 (2019-10-08)
+=======================================
+
+Bug Fixes
+---------
+
+- MerkleTreeIterator -> MerkleTreeGenerator
+
+
 Merkle_Tree_Stream 0.0.1a2 (2019-10-06)
 =======================================
 

README.rst

@@ -52,22 +52,20 @@ A note on naming
 ================
 
 For the purposes of uniformity and easy of discovery alongside the reference
-implementation, we use the same module name as `merkle-tree-stream`_. This may
-cause confusion since it is not clear what exactly is referred to when using
-the term "stream" in the context of Python. To be clear, this module provides a
-`Python iterator`_ which appears to match the implementation and meaning of the
-reference implementation.
+implementation, we use the same module name as `merkle-tree-stream`_. However,
+there is currently no stream implemented, only a generator is available. This
+is because the reference implementation of Hypercore 7 makes use of the
+generator only. A `stream`_ implementation may follow.
 
 .. _merkle-tree-stream: https://github.com/mafintosh/merkle-tree-stream
-.. _Python iterator: https://docs.python.org/3/c-api/iter.html
+.. _stream: https://docs.python.org/3/library/asyncio-stream.html
 
 .. _example:
 
 .. code-block:: python
 
     from hashlib import sha256
-    from merkle_tree_stream import MerkleTreeIterator
-
+    from merkle_tree_stream import MerkleTreeGenerator
 
     def leaf(node, roots=None):
         return sha256(node.data).digest()
@@ -78,10 +76,10 @@ reference implementation.
         sha256.update(second.data)
         return sha256.digest()
 
-    merkle_iter = MerkleTreeIterator(leaf=leaf, parent=parent)
-    merkle_iter.write('hello')
-    merkle_iter.write('hashed')
-    merkle_iter.write('world')
+    merkle = MerkleTreeGenerator(leaf=leaf, parent=parent)
+    merkle.write('hello')
+    merkle.write('hashed')
+    merkle.write('world')
 
 .. _documentation:
 

merkle_tree_stream/__init__.py

@@ -1,7 +1,7 @@
 """merkle-tree-stream module."""
 
 from merkle_tree_stream.node import MerkleTreeNode  # noqa
-from merkle_tree_stream.tree import MerkleTreeIterator  # noqa
+from merkle_tree_stream.tree import MerkleTreeGenerator  # noqa
 
 try:
     import pkg_resources

merkle_tree_stream/tree.py

@@ -1,4 +1,4 @@
-"""A merkle tree iterator."""
+"""A merkle tree generator."""
 
 from typing import Any, Callable, Iterator, List
 
@@ -10,14 +10,14 @@ from merkle_tree_stream.node import MerkleTreeNode
 EMPTY_DATA = b''
 EMPTY_HASH = None
 
-__all__ = ['MerkleTreeIterator']
+__all__ = ['MerkleTreeGenerator']
 
 flat_tree = FlatTreeAccessor()
 
 
 @attr.s(auto_attribs=True)
-class MerkleTreeIterator:
-    """A merkle tree iterator.
+class MerkleTreeGenerator:
+    """A merkle tree generator.
 
     :param leaf: The leaf hash generation function
     :param parent: The parent hash generation function

test/test_tree.py

@@ -4,53 +4,53 @@ import hashlib
 
 import pytest
 
-from merkle_tree_stream import MerkleTreeIterator, MerkleTreeNode
+from merkle_tree_stream import MerkleTreeGenerator, MerkleTreeNode
 
 
 def test_hashes(leaf, parent):
-    merkle_iter = MerkleTreeIterator(leaf=leaf, parent=parent)
+    merkle = MerkleTreeGenerator(leaf=leaf, parent=parent)
 
-    merkle_iter.write(b'a')
-    merkle_iter.write(b'b')
+    merkle.write(b'a')
+    merkle.write(b'b')
 
     expected_count = 2 + 1  # nodes plus parent
-    assert len(merkle_iter) == expected_count
+    assert len(merkle) == expected_count
 
-    assert next(merkle_iter) == MerkleTreeNode(
+    assert next(merkle) == MerkleTreeNode(
         index=0, parent=1, hash=hashlib.sha256(b'a').digest(), size=1, data=b'a'
     )
 
-    assert next(merkle_iter) == MerkleTreeNode(
+    assert next(merkle) == MerkleTreeNode(
         index=2, parent=1, hash=hashlib.sha256(b'b').digest(), size=1, data=b'b'
     )
 
     hashed = hashlib.sha256(b'a')
     hashed.update(b'b')
 
-    assert next(merkle_iter) == MerkleTreeNode(
+    assert next(merkle) == MerkleTreeNode(
         index=1, parent=3, hash=hashed.digest(), size=2, data=b''
     )
 
     with pytest.raises(StopIteration):
-        next(merkle_iter)
+        next(merkle)
 
 
 def test_single_root(leaf, parent):
-    merkle_iter = MerkleTreeIterator(leaf=leaf, parent=parent)
+    merkle = MerkleTreeGenerator(leaf=leaf, parent=parent)
 
-    merkle_iter.write(b'a')
-    merkle_iter.write(b'b')
-    merkle_iter.write(b'c')
-    merkle_iter.write(b'd')
+    merkle.write(b'a')
+    merkle.write(b'b')
+    merkle.write(b'c')
+    merkle.write(b'd')
 
-    assert len(merkle_iter.roots) == 1
+    assert len(merkle.roots) == 1
 
 
 def multiple_roots(leaf, parent):
-    merkle_iter = MerkleTreeIterator(leaf=leaf, parent=parent)
+    merkle = MerkleTreeGenerator(leaf=leaf, parent=parent)
 
-    merkle_iter.write(b'a')
-    merkle_iter.write(b'b')
-    merkle_iter.write(b'c')
+    merkle.write(b'a')
+    merkle.write(b'b')
+    merkle.write(b'c')
 
-    assert len(merkle_iter.roots) > 1
+    assert len(merkle.roots) > 1