SageMath 9.0 and SageMath 9.1

[Samuel Lelièvre]

# News from SageMath, the Sage Mathematics Software System!


## New releases

SageMath 9.0 was released on 2020-01-01.
SageMath 9.1 was released on 2020-05-20.

My apologies for not sending timely announcements.

The source files and binaries for Linux, macOS and Windows
have made their way to the download mirrors.


## Python 3

The big news is that SageMath 9.0 and SageMath 9.1
are primarily based on Python 3. If you download
SageMath for your system from the SageMath website,
you will get a version based on Python 3.

For SageMath 9.0 and SageMath 9.1, it is still possible
to get a version based on Python 2 by building from source.

Starting from SageMath 9.2, SageMath will be Python 3 only,
and there will no longer be a way to build for Python 2.

For more on the switch to Python 3, see:

- "Python 3 switch" page on the SageMath wiki
https://wiki.sagemath.org/Python3-Switch


## More about SageMath 9.0, SageMath 9.1, SageMath 9.2


### SageMath 9.0

- Announcement posted on the SageManifolds mailing list:
https://sympa.obspm.fr/wws/arc/sagemanifolds.list/2020-01/msg00000.html

- Release tour
https://wiki.sagemath.org/ReleaseTours/sage-9.0


### SageMath 9.1

- Announcement posted on the SageManifolds mailing list:
https://sympa.obspm.fr/wws/arc/sagemanifolds.list/2020-05/msg00000.html

- Release tour
https://wiki.sagemath.org/ReleaseTours/sage-9.1


### SageMath 9.2

Progress towards SageMath 9.2 is steady,
with seven beta releases already released.

The release tour is already being prepared and gives
a general idea of some of the things that are coming:

- https://wiki.sagemath.org/ReleaseTours/sage-9.2


## Future announcements

Éric Gourgoulhon will take over sending announcements
to this list, starting with SageMath 9.2.