# Announcement: NetworkX 2.6¶

We’re happy to announce the release of NetworkX 2.6! NetworkX is a Python package for the creation, manipulation, and study of the structure, dynamics, and functions of complex networks.

For more information, please visit our website and our gallery of examples. Please send comments and questions to the networkx-discuss mailing list.

## Highlights¶

This release is the result of X of work with over X pull requests by X contributors. Highlights include:

Dropped support for Python 3.6.

NumPy, SciPy, Matplotlib, and pandas are now default requirements.

## Improvements¶

## API Changes¶

[#4190] Removed

`tracemin_chol`

. Use`tracemin_lu`

instead.[#4216] In

`to_*_array/matrix`

, nodes in nodelist but not in G now raise an exception. Use G.add_nodes_from(nodelist) to add them to G before converting.[#4360] Internally

`nx_pylab.draw_networkx_edges`

now always generates a list of`matplotlib.patches.FancyArrowPatch`

rather than using a`matplotlib.collections.LineCollection`

for un-directed graphs. This unifies interface for all types of graphs. In addition to the API change this may cause a performance regression for large graphs.[#4384] Added edge_key parameter for MultiGraphs in to_pandas_edgelist

[#4466]

`relabel_nodes`

used to raise a KeyError for a key in`mapping`

that is not a node in the graph, but it only did this when`copy`

was`False`

. Now any keys in`mapping`

which are not in the graph are ignored.[#4573]

`label_propagation_communities`

returns a`dict_values`

object of community sets of nodes instead of a generator of community sets. It is still iterable, so likely will still work in most user code and a simple fix otherwise: e.g., add`iter( ... )`

surrounding the function call.[#4545]

`prefix_tree`

used to return`tree, root`

but root is now always 0 instead of a UUID generate string. So the function returns`tree`

.[#4545] The variable

`NIL`

=”NIL” has been removed from`networkx.generators.trees`

[#3620] The function

`naive_greedy_modularity_communities`

now returns a list of communities (like`greedy_modularity_communities`

) instead of a generator of communities.

## Deprecations¶

[#4238] Deprecate

`to_numpy_matrix`

and`from_numpy_matrix`

.[#4279] Deprecate

`networkx.utils.misc.is_iterator`

. Use`isinstance(obj, collections.abc.Iterator)`

instead.[#4280] Deprecate

`networkx.utils.misc.is_list_of_ints`

as it is no longer used. See`networkx.utils.misc.make_list_of_ints`

for related functionality.[#4281] Deprecate

`read_yaml`

and`write_yaml`

.[#4282] Deprecate

`read_gpickle`

and`write_gpickle`

.[#4298] Deprecate

`read_shp`

,`edges_from_line`

, and`write_shp`

.[#4319] Deprecate

`pagerank_numpy`

,`pagerank_scipy`

.[#4355] Deprecate

`copy`

method in the coreview Filtered-related classes.[#4384] Deprecate unused

`order`

parameter in to_pandas_edgelist.[#4428] Deprecate

`jit_data`

and`jit_graph`

.[#4449] Deprecate

`consume`

.[#4448] Deprecate

`iterable`

.[#4545] Deprecate

`generate_unique_node`

.[#4599] Deprecate

`empty_generator`

.[#4617] Deprecate

`hub_matrix`

and`authority_matrix`

[#4629] Deprecate the

`Ordered`

graph classes.

## Contributors to this release¶

<output of contribs.py>

## Pull requests merged in this release¶

<output of contribs.py>