Added a change-log: new file, v1.0.0_changelog.md

gerrychain/graph/__init__.py

@@ -1,19 +1,32 @@
 """
-This module provides the Graph class that is used
+This module implements the Graph class that is used
 by GerryChain code.
 
+It exposes standard graph functionality for a dual-graph
+containing nodes and edges.  Both nodes and edges can have
+data associated with them.
+
 A Graph object is typically created by first creating
-a NetworkX Graph object and then converting it to
+a NetworkX.Graph object and then converting it to
 a GerryChain Graph object using from_networkx().
 
-Internally, a Graph object contains and embedded graph
+For instance:
+
+    import networkx
+    from gerrychain import Graph
+
+    # Create a NetworkX graph
+    nx_graph = networkx.Graph()
+    nx_graph.add_edges_from(...)
+
+    # Create a GerryChain graph from the NetworkX graph
+    my_gerrychain_graph = Graph.from_networkx(nx_graph)
+
+Internally, a Graph object contains an embedded graph
 object based either on NetworkX or RustworkX.  After
 creating a Partition object in GerryChain, the embedded
 graph object is converted to be based on RustworkX (for
 performance reasons).
-
-The class Graph is the only part of this module that
-is intended to be used directly by users of GerryChain.
 """
 
 from .adjacency import *

v1.0.0_changelog.md

@@ -0,0 +1,175 @@
+## [v1.0.0] - August 2026    
+
+### Added
+
+#### Markov chains (module: chain)
+* Added ability to incrementally configure the chain.  
+
+    You can explicitly set class attributes, such as: `chain.initial_partition = ...`.  
+
+    Functions to add constraints and updaters: 
+
+    * add_constraint()
+    * add_constraints()
+    * add_updater()
+    * add_updaters()
+
+    Function to check whether a chain is fully configured: 
+
+    * check_valid()
+
+#### Graphs (module: graph)
+* Added methods to query and access the embedded NetworkX/RustworkX graph.
+
+    * is_nx_graph()
+    * is_rx_graph()
+    * get_nx_graph()
+    * get_rx_graph()
+
+* Added methods for converting between GerryChain, NetworkX, and RustworkX graphs, and to create an empty graph.  
+
+    * from_networkx()
+    * from_rustworkx()
+    * from_null_networkx()
+    * to_networkx_graph()
+
+* Added method to create a fictional 8x8 grid graph of 64 unit-population nodes that is used in the User Guide.
+
+    * gerrymandria()
+
+
+* Added methods to translate node_ids between NetworkX and RustworkX and between parent graphs and subgraphs - to deal with the differences between the way NetworkX and RustworkX implement node_ids.  
+
+    * original_nx_node_id_for_internal_node_id()
+    * internal_node_id_for_original_nx_node_id()
+    * get_nx_to_rx_node_id_map()
+    * translate_subgraph_node_ids_for_set_of_nodes()
+    * original_nx_node_ids_for_list()
+    * original_nx_node_ids_for_set()
+    * translate_subgraph_node_ids_for_flips()
+
+* Added methods to handle the fact that in RustworkX, edges are different from edge_ids.  In both NetworkX and RustworkX, an edge is a tuple of node_ids.  In NetworkX, there is no difference between an edge and an edge_id, but in RustworkX an edge_id is an integer.
+
+    * get_edge_id_from_edge()
+    * get_edge_from_edge_id()
+
+#### Proposals (module: proposals)
+
+* Added new names for legacy functions.  The new names adhere to the naming convention for creating proposal functions, "build_xxx_proposal_fn".  Note that the legacy functions continue to exist.
+
+    * build_any_node_flip_proposal_fn() == propose_any_node_flip()
+    * build_random_flip_proposal_fn() == propose_random_flip()
+    * build_flip_every_district_proposal_fn() == propose_flip_every_district()
+    * build_chunk_flip_proposal_fn() == propose_chunk_flip()
+    * build_slow_reversible_proposal_fn() == slow_reversible_propose()
+    * build_slow_reversible_bi_proposal_fn() == slow_reversible_propose_bi()
+
+#### ReCom proposals (module: proposals)
+* Changed the ReCom class to be a namespace that defines the five variants of recom that were discussed in the article, "Spanning Tree Methods for Sampling Graph Partitions":
+
+    * A = cut_edges_mst()
+    * B = district_pairs_mst()
+    * C = cut_edges_ust()
+    * D = district_pairs_ust()
+    * R = reversible()
+
+* Added convenience functions to create recom proposal functions:
+
+    * build_recom_proposal_fn()
+    * build_reversible_recom_proposal_fn()
+
+#### Multi-member ReCom (module: proposals)
+
+* Added functions and the MultiMemberReCom class to support multi-member ReCom.  These new functions and the MultiMemberReCom class mirror the routines and class for standard ReCom:
+
+    * multi_member_recom()
+    * build_multi_member_recom_proposal_fn()
+    * epsilon_tree_bipartition_multi_member()
+    * class MultiMemberReCom
+        * cut_edges_mst()
+        * district_pairs_mst()
+        * cut_edges_ust()
+        * district_pairs_ust()
+
+#### Constraints for multi-member ReCom (module: constraints)
+
+* Added a new constraint to support multi-member ReCom
+
+    * within_percent_of_ideal_population_per_member()
+
+### Changed
+
+#### Graphs
+
+* `GerryChain.Graph` no longer subclasses `networkx.Graph`.  Node and edge data access has changed.  See the v1.0 migration guide. [link-name](https://ibm.com)
+
+    frm: TODO: Add link to the v1.0 migration guide.
+
+* Changed the way to access node and edge data
+
+    * To access node data, use: my_graph.node_data(...node_id...)
+    * To access edge data, use: my_graph.edge_data(...edge_id...)
+
+* GerryChain now uses independent random number generators configured through parameters, `rng= `.  See the reproducibility guide. [link-name](https://ibm.com)
+
+    frm: TODO: add link to reproducibility guide
+
+#### Changes to function names:
+
+* In module grid:
+
+    * create_grid_graph() renamed to be: create_grid_nx_graph()
+
+#### Renamed parameters that accept functions
+
+* Parameters accepting functions now generally have names that use the _fn suffix:
+
+    This is only an issue for function calls using named parameters.
+
+    An example of this is the renaming of "proposal" to "proposal_fn" in the constructor for a MarkovChain object:
+
+    Old:
+    ```
+    my_chain = MarkovChain(
+        proposal = my_proposal,
+        ...
+    )
+    ```
+    New:
+    ```
+    my_chain = MarkovChain(
+        proposal_fn = my_proposal,
+        ...
+    )
+    ```
+### Removed
+
+#### Removed the pre-1.0 NetworkX-derived Graph interface. 
+
+* gerrychain.Graph is no longer a subclass of networkx.Graph. 
+
+    See the migration guide for the replacement graph operations.
+
+    frm: TODO: Add link for migration guide above.
+
+#### Removed the old instantiable and callable ReCom interface. 
+
+* The old ReCom class was instantiable and callable.  It has been replaced with an interface that implements a namespace that defines functions that generate proposal functions.
+
+    See the ???  #### The `ReCom` Namespace for details.
+
+    frm: TODO: Add link for ??? the discussion in the Migration Guide for details.
+
+### Deprecated
+
+#### Pre-1.0 proposal and acceptance callbacks that lack `rng= `.
+
+* The callbacks now support a "reproducibility" parameter, `rng= `, that defines a random number generator.  This allows the user to control the initial conditions so that the behavior of GerryChain is deterministic.
+
+    For more details see the reproducibility guide. [link-name](https://ibm.com)
+
+    frm: TODO: add link to reproducibility guide
+
+#### Legacy constructor and method parameter names for MarkovChain, Gingleator, SingleMetricOptimizer, etc. 
+
+* The legacy versions of these remain temporarily supported with warnings.