ImportError: cannot import name 'plot_fpca_perturbation_graphs' from 'skfda.exploratory.visualization' ; ImportError: cannot import name 'FPCA' from 'skfda.preprocessing.dim_reduction.projection'

[rorondre]

Describe the bug
When importing functions from 'skfda.exploratory.visualization', I get an import error:

ImportError: cannot import name 'plot_fpca_perturbation_graphs' from 'skfda.exploratory.visualization'

The same holds for FPCA in 'skfda.preprocessing.dim_reduction.projection' :

ImportError: cannot import name 'FPCA' from 'skfda.preprocessing.dim_reduction.projection'

I have downloaded the package with

pip install scikit-fda

and I was trying to follow the documentation for Functional Principal Component Analysis here (https://fda.readthedocs.io/en/latest/auto_examples/plot_fpca.html#sphx-glr-auto-examples-plot-fpca-py), but I get errors on the import statements

To Reproduce
Code to reproduce the behavior:

import skfda
from skfda.exploratory.visualization import plot_fpca_perturbation_graphs
...

and

import skfda
from skfda.preprocessing.dim_reduction.projection import FPCA
...

Expected behavior
I am expecting the import statements to work as in the documentation

Version information

• OS: Windows
• Python version: 3.8
• scikit-fda version: 0.3

Additional context
Are you planning on releasing the current version from the develop branch anytime soon? I have also tried to install the latest version of the package, but then I get the import error for skfda, even though I can see the package installed in anaconda3\envs\my_env\Lib\site-packages\skfda . Thank you!

[vnmabus]

I have released a new version (0.4) of scikit-fda in PyPI. Sorry for uploading versions with such low frequency! I will try to do it in a more regular fashion in the future.

The default documentation page is that of the latest (develop) version. The master documentation is in the "stable" URL: https://fda.readthedocs.io/en/stable/. Again, sorry if that was confusing.

Please, confirm that the currently released version works for you, in order to close this issue.

[rorondre]

Thank you for your quick response and release! I don't know why but I get

import skfda
ModuleNotFoundError: No module named 'optimum_reparam'

I have used pip install scikit-fda from inside my conda environment. The issue appears similar to '#196', but the fix in that case didn't work for me. I have cython 0.29.21 installed as part of the installation of scikit-fda.

Any advice on how to proceed? Thanks.

[vnmabus]

I tried to reproduce the error in a conda environment in Windows, but I could not.

I tried to create a new conda environment and activate it:

>conda create -n test_skfda_04 python=3.8
>conda activate test_skfda_04

The default installed packages where:

>conda list
# Name                    Version                   Build  Channel
ca-certificates           2020.6.24                     0
certifi                   2020.6.20                py38_0
openssl                   1.1.1g               he774522_0
pip                       20.1.1                   py38_1
python                    3.8.3                he1778fa_2
setuptools                49.2.0                   py38_0
sqlite                    3.32.3               h2a8f88b_0
vc                        14.1                 h0510ff6_4
vs2015_runtime            14.16.27012          hf0eaf9b_3
wheel                     0.34.2                   py38_0
wincertstore              0.2                      py38_0
zlib                      1.2.11               h62dcd97_4

The installation was performed with no errors:

>pip install scikit-fda

The packages after the installation where:

>conda list
# Name                    Version                   Build  Channel
ca-certificates           2020.6.24                     0
certifi                   2020.6.20                py38_0
cycler                    0.10.0                   pypi_0    pypi
cython                    0.29.21                  pypi_0    pypi
findiff                   0.8.3                    pypi_0    pypi
joblib                    0.16.0                   pypi_0    pypi
kiwisolver                1.2.0                    pypi_0    pypi
matplotlib                3.3.0                    pypi_0    pypi
mpldatacursor             0.7.1                    pypi_0    pypi
multimethod               1.3                      pypi_0    pypi
numpy                     1.19.1                   pypi_0    pypi
openssl                   1.1.1g               he774522_0
pandas                    1.0.5                    pypi_0    pypi
pillow                    7.2.0                    pypi_0    pypi
pip                       20.1.1                   py38_1
pyparsing                 2.4.7                    pypi_0    pypi
python                    3.8.3                he1778fa_2
python-dateutil           2.8.1                    pypi_0    pypi
pytz                      2020.1                   pypi_0    pypi
rdata                     0.2.1                    pypi_0    pypi
scikit-datasets           0.1.38                   pypi_0    pypi
scikit-fda                0.4                      pypi_0    pypi
scikit-learn              0.23.1                   pypi_0    pypi
scipy                     1.5.2                    pypi_0    pypi
setuptools                49.2.0                   py38_0
six                       1.15.0                   pypi_0    pypi
sqlite                    3.32.3               h2a8f88b_0
threadpoolctl             2.1.0                    pypi_0    pypi
vc                        14.1                 h0510ff6_4
vs2015_runtime            14.16.27012          hf0eaf9b_3
wheel                     0.34.2                   py38_0
wincertstore              0.2                      py38_0
xarray                    0.16.0                   pypi_0    pypi
zlib                      1.2.11               h62dcd97_4

Please, try to check if any dependency or step were different in your case. In particular, I would like to know if there was any error during the pip install step.

[rorondre]

Thank you for your effort. There are no errors when I do pip install. I've repeated your steps and can open a python console from within the conda environment, where I can import skfda without a problem and try some of the examples in the documentation. The issue must be on my side with my jupyter notebook setup (the error occurs only there). I will close the issue now. Thank you again.