Pip is broken after installing Basemap "AttributeError: '_NamespacePath' object has no attribute 'sort'"

[crawforc3]

For some reason, https://github.com/matplotlib/basemap/commit/decfa95124dab76499734145d03b002b9db27477 breaks pip.

Running any pip command after installing Basemap from source returns this error. This can be reproduced with this Anaconda Dockerfile:

FROM continuumio/anaconda3:5.0.1

RUN apt-get update && \
    apt-get install -y build-essential && \
    conda update -y conda && \
    conda update -y python && \
    apt-get -y install libgeos-dev && \
    pip install pyshp && \
    pip install pyproj && \
    cd /usr/local/src && \
    export GEOS_DIR=/usr/local && \
    git clone https://github.com/matplotlib/basemap.git && \
    cd basemap && \
    python setup.py install && \
    pip -V

Finished processing dependencies for basemap==1.1.0
Traceback (most recent call last):
  File "/opt/conda/bin/pip", line 7, in <module>
    from pip import main
  File "/opt/conda/lib/python3.6/site-packages/pip/__init__.py", line 26, in <module>
    from pip.utils import get_installed_distributions, get_prog
  File "/opt/conda/lib/python3.6/site-packages/pip/utils/__init__.py", line 27, in <module>
    from pip._vendor import pkg_resources
  File "/opt/conda/lib/python3.6/site-packages/pip/_vendor/pkg_resources/__init__.py", line 3018, in <module>
    @_call_aside
  File "/opt/conda/lib/python3.6/site-packages/pip/_vendor/pkg_resources/__init__.py", line 3004, in _call_aside
    f(*args, **kwargs)
  File "/opt/conda/lib/python3.6/site-packages/pip/_vendor/pkg_resources/__init__.py", line 3046, in _initialize_master_working_set
    dist.activate(replace=False)
  File "/opt/conda/lib/python3.6/site-packages/pip/_vendor/pkg_resources/__init__.py", line 2578, in activate
    declare_namespace(pkg)
  File "/opt/conda/lib/python3.6/site-packages/pip/_vendor/pkg_resources/__init__.py", line 2152, in declare_namespace
    _handle_ns(packageName, path_item)
  File "/opt/conda/lib/python3.6/site-packages/pip/_vendor/pkg_resources/__init__.py", line 2092, in _handle_ns
    _rebuild_mod_path(path, packageName, module)
  File "/opt/conda/lib/python3.6/site-packages/pip/_vendor/pkg_resources/__init__.py", line 2121, in _rebuild_mod_path
    orig_path.sort(key=position_in_sys_path)
AttributeError: '_NamespacePath' object has no attribute 'sort'
The command '/bin/sh -c apt-get update &&     apt-get install -y build-essential &&     conda update -y conda &&     conda update -y python &&     apt-get -y install libgeos-dev &&     pip install pyshp &&     pip install pyproj &&     cd /usr/local/src &&     export GEOS_DIR=/usr/local &&     git clone https://github.com/matplotlib/basemap.git &&     cd basemap &&     python setup.py install &&     pip -V' returned anon-zero code: 1

[efiring]

On 2018/05/09 2:08 PM, crawforc3 wrote:

|AttributeError: '_NamespacePath' object has no attribute 'sort'|

First Google hit indicates that it is a setuptools/pip version problem:

https://github.com/pypa/setuptools/issues/885

[fenchu]

if you add 'pip install pip --upgrade' after python install it works:

# pip -V
pip 10.0.1 from /opt/conda/lib/python3.6/site-packages/pip (python 3.6)

[ghost]

I modified the Dockerfile to upgrade pip and install GEOS from source (https://matplotlib.org/basemap/users/installing.html)

I now get a "ModuleNotFoundError" error when importing Basemap

Traceback (most recent call last):
  File "<string>", line 1, in <module>
ModuleNotFoundError: No module named 'mpl_toolkits.basemap'

Installing basemap with conda works, so maybe I'm installing to the wrong path?

Updated Dockerfile:

RUN apt-get update && \
    #apt-get -y install libgeos-dev && \
    pip install matplotlib && \
    pip install pyshp && \
    pip install pyproj && \
    cd /usr/local/src && git clone https://github.com/matplotlib/basemap.git && \
    cd basemap/geos-3.3.3 && \
    export GEOS_DIR=/usr/local && \
    ./configure --prefix=$GEOS_DIR && \
    make && make install && \
    cd .. && python setup.py install && \
    # Pillow (PIL)
    apt-get -y install zlib1g-dev liblcms2-dev libwebp-dev && \
    pip install Pillow && \
    python -c "from mpl_toolkits.basemap import Basemap"

[molinav]

@crawforc3 Could you check if the problem persists? I cannot reproduce it with the latest version of basemap (note that you can install it now directly with pip because PyPI stores manylinux wheels):

RUN apt-get update && \
    conda update -y conda && \
    conda update -y python && \
    pip install --upgrade pip && \
    pip install --upgrade matplotlib && \
    pip install basemap && \
    python -c "from mpl_toolkits.basemap import Basemap"

In particular, after this Docker RUN line, I am getting the following libraries installed:

• Python 3.6.3 :: Anaconda, Inc.
• pip 21.3.1 from /opt/conda/lib/python3.6/site-packages/pip (python 3.6)
• numpy: 1.19.5
• matplotlib: 3.3.4
• pyproj: 3.0.1
• pyshp: 2.1.3
• basemap: 1.3.1

The last command importing Basemap returns no error. I can also import the basemap package and print its version and it works:

root@fab3dd71c0cb:/# python -c "from mpl_toolkits import basemap; print(basemap.__version__)"
1.3.1

[molinav]

I am closing this issue due to lack of feedback and because it is not possible to reproduce with any recent version of basemap and its dependencies.