Import fails due to "is_scalar" error (fresh installation)

[paullb514]

Python verison 3.6.4
mathplotlib verison 3.0.1

Simpletest.py test script fails with the following error after compiling from source as per the instructions:

$ python3 simpletest.py
Traceback (most recent call last):
File "simpletest.py", line 1, in
from mpl_toolkits.basemap import Basemap
File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/mpl_toolkits/basemap/init.py", line 17, in
from matplotlib.cbook import is_scalar, dedent
ImportError: cannot import name 'is_scalar'

[WeatherGod]

It looks like you have an older version of basemap. This has already been fixed and is in the released version v1.2.0.

Some notes: basemap is considered deprecated in favor of the cartopy package. Please learn cartopy instead. Second, the preferred method of installing basemap (or cartopy) is through conda-forge due to its complex build process and dependencies.

[paullb514]

I downloaded the latest version of the website today so if that's the case the page needs ot be updated.

I did ultimately get it going using conda. I will looking into Cartopy as well so thanks for that!

[WeatherGod]

Oh! you are right! The download page still points to sourceforge. That is years out of date and I never noticed. I will fix that right away!

…

On Wed, Nov 7, 2018 at 7:35 PM paullb514 ***@***.***> wrote: I downloaded the latest version of the website today so if that's the case the page needs ot be updated. I did ultimately get it going using conda. I will looking into Cartopy as well so thanks for that! — You are receiving this because you modified the open/close state. Reply to this email directly, view it on GitHub <#439 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AARy-Cr8tKJZpo9RZDp89M0H-9UowsqPks5us3xdgaJpZM4YRufU> .

[samfway]

Had the same issue, resolved by upgrading basemap:
sudo pip install -U git+https://github.com/matplotlib/basemap.git

[boegel]

I just ran into this as well, even though I was using the latest version on PyPI (which is 1.0.7), see https://pypi.org/project/basemap/#history .

Any reason why the latest basemap releases are not published on PyPI?

[goyal-vi]

I'm unable to resolve this issue, even though I'm using the version v1.2.0. I'm using Ubuntu 18.04, python 3.6.
During the execution of configure, I encountered undefined isnan macro error, which I resolved by replacing line 24 in platform.h file with #define HAVE_ISNAN 1.

[maltemuellerm]

Wher do you find the platform.h?

[davide-p]

I managed to solve this "is_scalar" problem by doing what suggested by @samfway, but when running from mpl_toolkits.basemap import Basemap I get the following:
Traceback (most recent call last): File "<stdin>", line 1, in <module> File "/usr/local/lib/python3.6/dist-packages/mpl_toolkits/basemap/__init__.py", line 48, in <module> import _geoslib ImportError: libgeos-3.3.3.so: cannot open shared object file: No such file or directory

Any clue on how to solve this?

[emilhe]

@goyal-vi The error is due to your environment being incompatible (too new) with the old GEOS version. A workaround is to issue the following command before running configure,

export CXX="g++ -std=c++98"

@davide-p The error message simply states that the GEOS library cannot be found. Assuming that you have already compiled it as per the instructions, i.e. with GEOS_DIR=/usr/local, it should be sufficient to modify your LD_LIBRARY_PATH as follows,

export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/usr/local/lib

[dbpodrasky]

The source link is still pointing to 1.1.0 on the https://matplotlib.org/basemap/users/installing.html page

[jingqiangye]

Installing matplotlib in 2.2.0 will work
conda install matploblib=2.2.0

[pc0179]

Maybe I must have missed something? However, I've downloaded Anaconda and setup a virtual python environment specifically to install matplotlib (I tried both versions; 3.1.1 and 2.2.0) as well as basemap v1.2.0 and I am still getting the "cannot import is_scalar" error.
I guess I'll start reading the cartopy docs?

[ChrisVarner]

Referencing the link comments above (i.e. WeatherGod and dbpodrasky), the download link [https://matplotlib.org/basemap/users/download.html] is still pointing to v1.1.0. That link for basemap is still causing installation issues. samfway's solution above works if you end up on this page.

[ilopezgp]

This worked for me:

pip install -U matplotlib==3.2
conda install -c conda-forge basemap