Merge branch 'master' of https://github.com/casact/chainladder-python

.gitignore

@@ -107,4 +107,6 @@ ENV/
 # references
 references/
 
-settings.json
+settings.json
+
+*.pkl

README.md

@@ -1,7 +1,7 @@
 # chainladder (python)
 [![PyPI version](https://badge.fury.io/py/chainladder.svg)](https://badge.fury.io/py/chainladder)
 ![Build Status](https://github.com/casact/chainladder-python/workflows/Unit%20Tests/badge.svg)
-[![Documentation Status](https://readthedocs.org/projects/chainladder-python/badge/?version=master)](http://chainladder-python.readthedocs.io/en/latest/?badge=master)
+[![Documentation Status](https://readthedocs.org/projects/chainladder-python/badge/?version=latest)](http://chainladder-python.readthedocs.io/en/latest/?badge=latest)
 [![codecov](https://codecov.io/gh/jbogaardt/chainladder-python/branch/master/graph/badge.svg)](https://codecov.io/gh/jbogaardt/chainladder-python)
 
 ## chainladder - Property and Casualty Loss Reserving in Python
@@ -17,6 +17,13 @@ another API.
 Please visit the [Documentation](https://chainladder-python.readthedocs.io/en/latest/) page for examples, how-tos, and source
 code documentation.
 
+## Tutorials
+Tutorial notebooks are available for download [here](https://github.com/casact/chainladder-python/tree/master/docs/tutorials).
+* [Working with Triangles](https://chainladder-python.readthedocs.io/en/latest/tutorials/triangle-tutorial.html)
+* [Selecting Development Patterns](https://chainladder-python.readthedocs.io/en/latest/tutorials/development-tutorial.html)
+* [Extending Development Patterns with Tails](https://chainladder-python.readthedocs.io/en/latest/tutorials/tail-tutorial.html)
+* [Applying Deterministic Methods](https://chainladder-python.readthedocs.io/en/latest/tutorials/deterministic-tutorial.html)
+
 ## Have a question?
 Feel free to reach out on [Gitter](https://gitter.im/chainladder-python/community).
 

chainladder/__init__.py

@@ -5,4 +5,4 @@
 from chainladder.methods import * # noqa (API Import)
 from chainladder.workflow import * # noqa (API Import)
 
-__version__ = '0.4.7'
+__version__ = '0.4.8'

chainladder/core/dunders.py

@@ -109,6 +109,11 @@ def __neg__(self):
     def __pos__(self):
         return self
 
+    def __abs__(self):
+        obj = copy.deepcopy(self)
+        obj.values = abs(obj.values)
+        return obj
+
     def __mul__(self, other):
         obj, other = self._validate_arithmetic(other)
         obj.values = np.nan_to_num(obj.values)*other

chainladder/development/base.py

@@ -58,7 +58,7 @@ class Development(DevelopmentBase):
         Sigma of the ldf regression
     std_err_ : Triangle
         Std_err of the ldf regression
-    w_ : Triangle
+    weight_ : pandas.DataFrame
         The weight used in the ldf regression
 
     """
@@ -73,6 +73,12 @@ def __init__(self, n_periods=-1, average='volume',
         self.drop_valuation = drop_valuation
         self.drop = drop
 
+    @property
+    def weight_(self):
+        return pd.DataFrame(
+            self.w_[0, 0], index=self.ldf_.origin,
+            columns=list(self.ldf_.development.values[:,0]))
+
     def _assign_n_periods_weight(self, X):
         if type(self.n_periods) is int:
             return self._assign_n_periods_weight_int(X, self.n_periods)[..., :-1]

chainladder/methods/__init__.py

@@ -4,4 +4,3 @@
 from chainladder.methods.benktander import Benktander # noqa (API import)
 from chainladder.methods.bornferg import BornhuetterFerguson # noqa (API import)
 from chainladder.methods.capecod import CapeCod # noqa (API import)
-from chainladder.methods.clark_capecod import ClarkCapeCod # noqa (API import)

chainladder/workflow/gridsearch.py

@@ -125,6 +125,19 @@ class Pipeline(PipelineSL, EstimatorIO):
         Read-only attribute to access any step parameter by user given name.
         Keys are step names and values are steps parameters."""
 
+    def fit(self, X, y=None, sample_weight=None, **fit_params):
+        if sample_weight:
+            fit_params = {} if not fit_params else fit_params
+            fit_params[self.steps[-1][0] + '__sample_weight'] = sample_weight
+        return super().fit(X, y, **fit_params)
+
+    def predict(self, X, sample_weight=None):
+        if sample_weight:
+            fit_params = {} if not fit_params else fit_params
+            fit_params[self.steps[-1][0] + '__sample_weight'] = sample_weight
+        return super().predict(X, y, **fit_params)
+
+
     def to_json(self):
         return json.dumps(
             [{'name': item[0],

docs/conf.py

@@ -132,8 +132,7 @@ def __getattr__(cls, name):
 # List of patterns, relative to source directory, that match files and
 # directories to ignore when looking for source files.
 # This patterns also effect to html_static_path and html_extra_path
-exclude_patterns = ['_build', 'templates', 'includes', 'themes']
-
+exclude_patterns = ['_build', 'templates', 'includes', 'themes', '**.ipynb_checkpoints']
 # The reST default role (used for this markup: `text`) to use for all
 # documents.
 default_role = 'any'

docs/themes/scikit-learn/layout.html

@@ -78,6 +78,7 @@
                 <li><a href="{{pathto('install')}}">Installation</a></li>
                 <li><a href="{{ pathto('modules/classes') }}">Documentation</a></li>
                 <li><a href="{{pathto('auto_examples/index')}}">Examples</a></li>
+                <li><a href="{{pathto('tutorials/index')}}">Tutorials</a></li>
             </ul>
             <a href="javascript:void(0);" onclick="showMenu()">
                 <div class="nav-icon">