I am happy to announce the second **release candidate** for NetworkX
2.6! This release has a larger than normal number of changes in
preparation for the upcoming 3.0 release. The current plan is to
release 2.6 soon, 2.7 near the end of summer, and 3.0 near the end of
the year.

The focus of the 3.0 release is on addressing years of technical debt
and making it easier to contribute. The 2.6 release deprecates over
30 functions. It also makes major changes to our default
dependencies. We no longer depend on the "decorator" library. More importantly, NumPy, SciPy, Matplotlib, and Pandas are now default
requirements. While we've made these core libraries of the scientific
Python ecosystem default dependencies, much of NetworkX still works
without these libraries and we expect that to continue. Be assured
that we test NetworkX with and without the dependencies, so if you do
**not** use functions that depend on external libraries you can
install NetworkX using pip with the `--no-deps` flag.

This release supports Python 3.7-3.9 and contains many new features.
It is the result of almost a year of work with over 300 pull requests
by over 80 contributors. If you have code that imports NetworkX,
please take some time to check that you are able to update your code
to work with the new release.

The draft 2.6 release announcement is here:
https://networkx.org/documentation/latest/release/release_dev.html

Please try out the pre-release and let us know about any problems you find.

Since this is a pre-release, pip won't automatically install it. So
$ pip install networkx
will still install networkx-2.5.1. But
$ pip install --pre networkx
will install networkx-2.6rc2. If you already have NetworkX installed
then you need to do
$ pip install --pre --upgrade networkx

For more information, please visit our website
- http://networkx.org
and our gallery of examples
- https://networkx.org/documentation/latest/auto_examples/index.html

Best regards,
Jarrod

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