Ravin Kohli: Final changes for v0.1.0 (#341)

Author: Github Actions

master/_downloads/307f532dbef0476f85afc6b64b65f087/example_resampling_strategy.py

@@ -26,10 +26,13 @@
 from autoPyTorch.api.tabular_classification import TabularClassificationTask
 from autoPyTorch.datasets.resampling_strategy import CrossValTypes, HoldoutValTypes
 
+############################################################################
+# Default Resampling Strategy
+# ============================
 
 ############################################################################
 # Data Loading
-# ============
+# ------------
 X, y = sklearn.datasets.fetch_openml(data_id=40981, return_X_y=True, as_frame=True)
 X_train, X_test, y_train, y_test = sklearn.model_selection.train_test_split(
     X,
@@ -39,7 +42,7 @@
 
 ############################################################################
 # Build and fit a classifier with default resampling strategy
-# ===========================================================
+# -----------------------------------------------------------
 api = TabularClassificationTask(
     # 'HoldoutValTypes.holdout_validation' with 'val_share': 0.33
     # is the default argument setting for TabularClassificationTask.
@@ -51,7 +54,7 @@
 
 ############################################################################
 # Search for an ensemble of machine learning algorithms
-# =====================================================
+# -----------------------------------------------------
 api.search(
     X_train=X_train,
     y_train=y_train,
@@ -64,27 +67,34 @@
 
 ############################################################################
 # Print the final ensemble performance
-# ====================================
-print(api.run_history, api.trajectory)
+# ------------------------------------
 y_pred = api.predict(X_test)
 score = api.score(y_pred, y_test)
 print(score)
 # Print the final ensemble built by AutoPyTorch
 print(api.show_models())
 
+# Print statistics from search
+print(api.sprint_statistics())
+
 ############################################################################
 
+############################################################################
+# Cross validation Resampling Strategy
+# =====================================
+
 ############################################################################
 # Build and fit a classifier with Cross validation resampling strategy
-# ====================================================================
+# --------------------------------------------------------------------
 api = TabularClassificationTask(
     resampling_strategy=CrossValTypes.k_fold_cross_validation,
     resampling_strategy_args={'num_splits': 3}
 )
 
 ############################################################################
 # Search for an ensemble of machine learning algorithms
-# =====================================================
+# -----------------------------------------------------------------------
+
 api.search(
     X_train=X_train,
     y_train=y_train,
@@ -97,19 +107,25 @@
 
 ############################################################################
 # Print the final ensemble performance
-# ====================================
-print(api.run_history, api.trajectory)
+# ------------
 y_pred = api.predict(X_test)
 score = api.score(y_pred, y_test)
 print(score)
 # Print the final ensemble built by AutoPyTorch
 print(api.show_models())
 
+# Print statistics from search
+print(api.sprint_statistics())
+
 ############################################################################
 
+############################################################################
+# Stratified Resampling Strategy
+# ===============================
+
 ############################################################################
 # Build and fit a classifier with Stratified resampling strategy
-# ==============================================================
+# --------------------------------------------------------------
 api = TabularClassificationTask(
     # For demonstration purposes, we use
     # Stratified hold out validation. However,
@@ -120,7 +136,7 @@
 
 ############################################################################
 # Search for an ensemble of machine learning algorithms
-# =====================================================
+# -----------------------------------------------------
 api.search(
     X_train=X_train,
     y_train=y_train,
@@ -134,9 +150,11 @@
 ############################################################################
 # Print the final ensemble performance
 # ====================================
-print(api.run_history, api.trajectory)
 y_pred = api.predict(X_test)
 score = api.score(y_pred, y_test)
 print(score)
 # Print the final ensemble built by AutoPyTorch
 print(api.show_models())
+
+# Print statistics from search
+print(api.sprint_statistics())

master/_downloads/38ebc52de63d1626596d1647c695c721/example_tabular_regression.ipynb

@@ -98,7 +98,7 @@
       },
       "outputs": [],
       "source": [
-        "print(api.run_history, api.trajectory)\ny_pred = api.predict(X_test)\n\n# Rescale the Neural Network predictions into the original target range\nscore = api.score(y_pred, y_test)\n\nprint(score)\n# Print the final ensemble built by AutoPyTorch\nprint(api.show_models())"
+        "y_pred = api.predict(X_test)\n\n# Rescale the Neural Network predictions into the original target range\nscore = api.score(y_pred, y_test)\n\nprint(score)\n# Print the final ensemble built by AutoPyTorch\nprint(api.show_models())\n\n# Print statistics from search\nprint(api.sprint_statistics())"
       ]
     }
   ],

master/_downloads/3b0b756ccfcac69e6a1673e56f2f543f/example_visualization.ipynb

@@ -98,7 +98,7 @@
       },
       "outputs": [],
       "source": [
-        "# We will plot the search incumbent through time.\n\n# Collect the performance of individual machine learning algorithms\n# found by SMAC\nindividual_performances = []\nfor run_key, run_value in estimator.run_history.data.items():\n    if run_value.status != StatusType.SUCCESS:\n        # Ignore crashed runs\n        continue\n    individual_performances.append({\n        'Timestamp': pd.Timestamp(\n            time.strftime(\n                '%Y-%m-%d %H:%M:%S',\n                time.localtime(run_value.endtime)\n            )\n        ),\n        'single_best_optimization_accuracy': accuracy._optimum - run_value.cost,\n        'single_best_test_accuracy': np.nan if run_value.additional_info is None else\n        accuracy._optimum - run_value.additional_info['test_loss'],\n    })\nindividual_performance_frame = pd.DataFrame(individual_performances)\n\n# Collect the performance of the ensemble through time\n# This ensemble is built from the machine learning algorithms\n# found by SMAC\nensemble_performance_frame = pd.DataFrame(estimator.ensemble_performance_history)\n\n# As we are tracking the incumbent, we are interested in the cummax() performance\nensemble_performance_frame['ensemble_optimization_accuracy'] = ensemble_performance_frame[\n    'train_accuracy'\n].cummax()\nensemble_performance_frame['ensemble_test_accuracy'] = ensemble_performance_frame[\n    'test_accuracy'\n].cummax()\nensemble_performance_frame.drop(columns=['test_accuracy', 'train_accuracy'], inplace=True)\nindividual_performance_frame['single_best_optimization_accuracy'] = individual_performance_frame[\n    'single_best_optimization_accuracy'\n].cummax()\nindividual_performance_frame['single_best_test_accuracy'] = individual_performance_frame[\n    'single_best_test_accuracy'\n].cummax()\n\npd.merge(\n    ensemble_performance_frame,\n    individual_performance_frame,\n    on=\"Timestamp\", how='outer'\n).sort_values('Timestamp').fillna(method='ffill').plot(\n    x='Timestamp',\n    kind='line',\n    legend=True,\n    title='Auto-PyTorch accuracy over time',\n    grid=True,\n)\nplt.show()\n\n# We then can understand the importance of each input feature using\n# a permutation importance analysis. This is done as a proof of concept, to\n# showcase that we can leverage of scikit-learn API.\nresult = permutation_importance(estimator, X_train, y_train, n_repeats=5,\n                                scoring='accuracy',\n                                random_state=seed)\nsorted_idx = result.importances_mean.argsort()\n\nfig, ax = plt.subplots()\nax.boxplot(result.importances[sorted_idx].T,\n           vert=False, labels=X_test.columns[sorted_idx])\nax.set_title(\"Permutation Importances (Train set)\")\nfig.tight_layout()\nplt.show()"
+        "# We will plot the search incumbent through time.\n\n# Collect the performance of individual machine learning algorithms\n# found by SMAC\nindividual_performances = []\nfor run_key, run_value in estimator.run_history.data.items():\n    if run_value.status != StatusType.SUCCESS:\n        # Ignore crashed runs\n        continue\n    individual_performances.append({\n        'Timestamp': pd.Timestamp(\n            time.strftime(\n                '%Y-%m-%d %H:%M:%S',\n                time.localtime(run_value.endtime)\n            )\n        ),\n        'single_best_optimization_accuracy': accuracy._optimum - run_value.cost,\n        'single_best_test_accuracy': np.nan if run_value.additional_info is None else\n        accuracy._optimum - run_value.additional_info['test_loss']['accuracy'],\n    })\nindividual_performance_frame = pd.DataFrame(individual_performances)\n\n# Collect the performance of the ensemble through time\n# This ensemble is built from the machine learning algorithms\n# found by SMAC\nensemble_performance_frame = pd.DataFrame(estimator.ensemble_performance_history)\n\n# As we are tracking the incumbent, we are interested in the cummax() performance\nensemble_performance_frame['ensemble_optimization_accuracy'] = ensemble_performance_frame[\n    'train_accuracy'\n].cummax()\nensemble_performance_frame['ensemble_test_accuracy'] = ensemble_performance_frame[\n    'test_accuracy'\n].cummax()\nensemble_performance_frame.drop(columns=['test_accuracy', 'train_accuracy'], inplace=True)\nindividual_performance_frame['single_best_optimization_accuracy'] = individual_performance_frame[\n    'single_best_optimization_accuracy'\n].cummax()\nindividual_performance_frame['single_best_test_accuracy'] = individual_performance_frame[\n    'single_best_test_accuracy'\n].cummax()\n\npd.merge(\n    ensemble_performance_frame,\n    individual_performance_frame,\n    on=\"Timestamp\", how='outer'\n).sort_values('Timestamp').fillna(method='ffill').plot(\n    x='Timestamp',\n    kind='line',\n    legend=True,\n    title='Auto-PyTorch accuracy over time',\n    grid=True,\n)\nplt.show()\n\n# We then can understand the importance of each input feature using\n# a permutation importance analysis. This is done as a proof of concept, to\n# showcase that we can leverage of scikit-learn API.\nresult = permutation_importance(estimator, X_train, y_train, n_repeats=5,\n                                scoring='accuracy',\n                                random_state=seed)\nsorted_idx = result.importances_mean.argsort()\n\nfig, ax = plt.subplots()\nax.boxplot(result.importances[sorted_idx].T,\n           vert=False, labels=X_test.columns[sorted_idx])\nax.set_title(\"Permutation Importances (Train set)\")\nfig.tight_layout()\nplt.show()"
       ]
     }
   ],