[MRG][DOC] Fixes almost all warnings in the docs (#338)

* Update API names, unuse depretaed html4

* Fixes a lot of warning. Add Methods doctree

* More warnings solved

* Fix docs dependencies

* New style for Example Code and References

* Add all Methods to all classes in docstrings, in alphabetical order

* Add MetricTransformer and MahalanobisMixin to auto-docs

* Delete unused vars in docs. Use simple quotes

* Fix identation

* Fix Github CI instead of old Travis CI

* References Lists are now numbered

* RemoveExample Code body almost everywhere

* Removed Methods directive. Kept warnings

* Deprecated directive now is red as in sklearn

Author: mvargas33

doc/_static/css/styles.css

@@ -0,0 +1,36 @@
+.hatnote {
+    border-color: #e1e4e5 ;
+    border-style: solid ;
+    border-width: 1px ;
+    font-size: x-small ;
+    font-style: italic ;
+    margin-left: auto ;
+    margin-right: auto ;
+    margin-bottom: 24px;
+    padding: 12px;
+}
+.hatnote-gray {
+  background-color: #f5f5f5 
+}
+.hatnote li {
+  list-style-type: square;
+  margin-left: 12px !important;
+}
+.hatnote ul {
+  list-style-type: square;
+  margin-left: 0px !important;
+  margin-bottom: 0px !important;
+}
+.deprecated {
+  color: #b94a48;
+  background-color: #F3E5E5;
+  border-color: #eed3d7;
+  margin-top: 0.5rem;
+  padding: 0.5rem;
+  border-radius: 0.5rem;
+  margin-bottom: 0.5rem;
+}
+
+.deprecated p {
+  margin-bottom: 0 !important;
+}

doc/conf.py

@@ -38,9 +38,6 @@
 html_static_path = ['_static']
 htmlhelp_basename = 'metric-learndoc'
 
-# Option to only need single backticks to refer to symbols
-default_role = 'any'
-
 # Option to hide doctests comments in the documentation (like # doctest:
 # +NORMALIZE_WHITESPACE for instance)
 trim_doctest_flags = True
@@ -67,10 +64,6 @@
 # generate autosummary even if no references
 autosummary_generate = True
 
-# Switch to old behavior with html4, for a good display of references,
-# as described in https://github.com/sphinx-doc/sphinx/issues/6705
-html4_writer = True
-
 
 # Temporary work-around for spacing problem between parameter and parameter
 # type in the doc, see https://github.com/numpy/numpydoc/issues/215. The bug
@@ -79,8 +72,8 @@
 # In an ideal world, this would get fixed in this PR:
 # https://github.com/readthedocs/sphinx_rtd_theme/pull/747/files
 def setup(app):
-    app.add_javascript('js/copybutton.js')
-    app.add_stylesheet("basic.css")
+  app.add_js_file('js/copybutton.js')
+  app.add_css_file('css/styles.css')
 
 
 # Remove matplotlib agg warnings from generated doc when using plt.show

doc/index.rst

@@ -1,6 +1,6 @@
 metric-learn: Metric Learning in Python
 =======================================
-|Travis-CI Build Status| |License| |PyPI version| |Code coverage|
+|GitHub Actions Build Status| |License| |PyPI version| |Code coverage|
 
 `metric-learn <https://github.com/scikit-learn-contrib/metric-learn>`_
 contains efficient Python implementations of several popular supervised and
@@ -57,8 +57,8 @@ Documentation outline
 
 :ref:`genindex` | :ref:`search`
 
-.. |Travis-CI Build Status| image:: https://api.travis-ci.org/scikit-learn-contrib/metric-learn.svg?branch=master
-   :target: https://travis-ci.org/scikit-learn-contrib/metric-learn
+.. |GitHub Actions Build Status| image:: https://github.com/scikit-learn-contrib/metric-learn/workflows/CI/badge.svg
+   :target: https://github.com/scikit-learn-contrib/metric-learn/actions?query=event%3Apush+branch%3Amaster
 .. |PyPI version| image:: https://badge.fury.io/py/metric-learn.svg
    :target: http://badge.fury.io/py/metric-learn
 .. |License| image:: http://img.shields.io/:license-mit-blue.svg?style=flat

doc/metric_learn.rst

@@ -13,6 +13,8 @@ Base Classes
 
     metric_learn.Constraints
     metric_learn.base_metric.BaseMetricLearner
+    metric_learn.base_metric.MetricTransformer
+    metric_learn.base_metric.MahalanobisMixin
     metric_learn.base_metric._PairsClassifierMixin
     metric_learn.base_metric._TripletsClassifierMixin
     metric_learn.base_metric._QuadrupletsClassifierMixin

doc/supervised.rst

@@ -152,7 +152,7 @@ neighbors (with same labels) of :math:`\mathbf{x}_{i}`, :math:`y_{ij}=0`
 indicates :math:`\mathbf{x}_{i}, \mathbf{x}_{j}` belong to different classes, 
 :math:`[\cdot]_+=\max(0, \cdot)` is the Hinge loss.
 
-.. topic:: Example Code:
+.. rubric:: Example Code
 
 ::
 
@@ -167,15 +167,15 @@ indicates :math:`\mathbf{x}_{i}, \mathbf{x}_{j}` belong to different classes,
     lmnn = LMNN(k=5, learn_rate=1e-6)
     lmnn.fit(X, Y, verbose=False)
 
-.. topic:: References:
+.. rubric:: References
 
-    .. [1] Weinberger et al. `Distance Metric Learning for Large Margin
-       Nearest Neighbor Classification
-       <http://jmlr.csail.mit.edu/papers/volume10/weinberger09a/weinberger09a.pdf>`_.
-       JMLR 2009
 
-    .. [2] `Wikipedia entry on Large Margin Nearest Neighbor <https://en.wikipedia.org/wiki/Large_margin_nearest_neighbor>`_
-       
+.. container:: hatnote hatnote-gray
+
+  [1]. Weinberger et al. `Distance Metric Learning for Large Margin Nearest Neighbor Classification <http://jmlr.csail.mit.edu/papers/volume10/weinberger09a/weinberger09a.pdf>`_. JMLR 2009.
+
+  [2]. `Wikipedia entry on Large Margin Nearest Neighbor <https://en.wikipedia.org/wiki/Large_margin_nearest_neighbor>`_.
+             
 
 .. _nca:
 
@@ -216,7 +216,7 @@ the sum of probability of being correctly classified:
 
       \mathbf{L} = \text{argmax}\sum_i p_i
 
-.. topic:: Example Code:
+.. rubric:: Example Code
 
 ::
 
@@ -231,13 +231,14 @@ the sum of probability of being correctly classified:
     nca = NCA(max_iter=1000)
     nca.fit(X, Y)
 
-.. topic:: References:
+.. rubric:: References
+
+
+.. container:: hatnote hatnote-gray
 
-    .. [1] Goldberger et al.
-       `Neighbourhood Components Analysis <https://papers.nips.cc/paper/2566-neighbourhood-components-analysis.pdf>`_.
-       NIPS 2005
+      [1]. Goldberger et al. `Neighbourhood Components Analysis <https://papers.nips.cc/paper/2566-neighbourhood-components-analysis.pdf>`_. NIPS 2005.
 
-    .. [2] `Wikipedia entry on Neighborhood Components Analysis <https://en.wikipedia.org/wiki/Neighbourhood_components_analysis>`_
+      [2]. `Wikipedia entry on Neighborhood Components Analysis <https://en.wikipedia.org/wiki/Neighbourhood_components_analysis>`_.
 
 
 .. _lfda:
@@ -289,7 +290,7 @@ nearby data pairs in the same class are made close and the data pairs in
 different classes are separated from each other; far apart data pairs in the 
 same class are not imposed to be close.
 
-.. topic:: Example Code:
+.. rubric:: Example Code
 
 ::
 
@@ -309,15 +310,14 @@ same class are not imposed to be close.
 
     To work around this, fit instances of this class to data once, then keep the instance around to do transformations.
 
-.. topic:: References:
+.. rubric:: References
 
-    .. [1] Sugiyama. `Dimensionality Reduction of Multimodal Labeled Data by Local
-       Fisher Discriminant Analysis <http://www.jmlr.org/papers/volume8/sugiyama07b/sugiyama07b.pdf>`_.
-       JMLR 2007
 
-    .. [2] Tang. `Local Fisher Discriminant Analysis on Beer Style Clustering
-       <https://gastrograph.com/resources/whitepapers/local-fisher
-       -discriminant-analysis-on-beer-style-clustering.html#>`_.
+.. container:: hatnote hatnote-gray
+
+      [1]. Sugiyama. `Dimensionality Reduction of Multimodal Labeled Data by Local Fisher Discriminant Analysis <http://www.jmlr.org/papers/volume8/sugiyama07b/sugiyama07b.pdf>`_. JMLR 2007.
+
+      [2]. Tang. `Local Fisher Discriminant Analysis on Beer Style Clustering <https://gastrograph.com/resources/whitepapers/local-fisher-discriminant-analysis-on-beer-style-clustering.html#>`_.
 
 .. _mlkr:
 
@@ -363,7 +363,7 @@ calculating a weighted average of all the training samples:
 
     \hat{y}_i = \frac{\sum_{j\neq i}y_jk_{ij}}{\sum_{j\neq i}k_{ij}}
 
-.. topic:: Example Code:
+.. rubric:: Example Code
 
 ::
 
@@ -377,10 +377,12 @@ calculating a weighted average of all the training samples:
     mlkr = MLKR()
     mlkr.fit(X, Y)
 
-.. topic:: References:
+.. rubric:: References
+
+
+.. container:: hatnote hatnote-gray
 
-    .. [1] Weinberger et al. `Metric Learning for Kernel Regression <http://proceedings.mlr.
-       press/v2/weinberger07a/weinberger07a.pdf>`_. AISTATS 2007
+    [1]. Weinberger et al. `Metric Learning for Kernel Regression <http://proceedings.mlr.press/v2/weinberger07a/weinberger07a.pdf>`_. AISTATS 2007.
 
 
 .. _supervised_version:
@@ -417,7 +419,7 @@ quadruplets, where for each quadruplet the two first points are from the same
 class, and the two last points are from a different class (so indeed the two
 last points should be less similar than the two first points).
 
-.. topic:: Example Code:
+.. rubric:: Example Code
 
 ::
 

doc/unsupervised.rst

@@ -20,7 +20,7 @@ It can be used for ZCA whitening of the data (see the Wikipedia page of
 `whitening transformation <https://en.wikipedia.org/wiki/\
 Whitening_transformation>`_).
 
-.. topic:: Example Code:
+.. rubric:: Example Code
 
 ::
 
@@ -32,6 +32,9 @@ Whitening_transformation>`_).
     cov = Covariance().fit(iris)
     x = cov.transform(iris)
 
-.. topic:: References:
+.. rubric:: References
 
-    .. [1] On the Generalized Distance in Statistics, P.C.Mahalanobis, 1936
+
+.. container:: hatnote hatnote-gray
+
+      [1]. On the Generalized Distance in Statistics, P.C.Mahalanobis, 1936.