def handle_prediction_state_by_project(project_id, body): # noqa: E501
"""Handles the state of the prediction of a project.
Handles the prediction state. # noqa: E501
:param project_id: ID of the current project.
:type project_id:
:param prediction_state:
:type prediction_state: dict | bytes
:rtype: PredictionStatus
"""
if connexion.request.is_json:
prediction_state = PredictionState.from_dict(
connexion.request.get_json()) # noqa: E501
try:
db_instance = DatabaseConnector.get_db_instance()
project = db_instance.get_project_by_id('project_id', project_id)
predicted_network_id = project['predicted_network_id']
#Note: Currently only working for one request. For parallel advanced
# handling (task queues, etc) necessary.
global prediction_process
if prediction_state.state == "Start":
print("BEGIN PREDICTION PRCOESS")
predictors = db_instance.get_selected_network_features_by_id(
'predicted_network_id', predicted_network_id)
evaluation = db_instance.get_evaluation_result_by_id(
'project_id', project_id)
configuration = evaluation['result_data']
worker = PredictionWorker(0, project_id, predictors,
configuration['with_validation'],
configuration['ml_preprocessing'],
configuration['train_sampling_ratio'],
configuration['test_sampling_ratio'],
configuration['random_seed'])
prediction_process = multiprocessing.Process(target=worker.predict,
daemon=True)
DatabaseConnector.get_db_instance().add_linkprediction_status(
0, 0, 0, 'Prediction', 'Waiting', 'project_id', project_id)
prediction_process.start()
elif prediction_state.state == "Abort":
print("ABORT PREDICTION PRCOESS")
prediction_process.terminate()
db_instance.add_linkprediction_status(0, 0, 0, "Prediction",
"Failed", 'project_id',
project_id)
except Exception as error:
return ('Exception', error)
return 'Prediction state altered!'
def get_prediction_status_by_project(project_id): # noqa: E501
"""Find prediction status by a project ID.
Returns the current prediction state. # noqa: E501
:param project_id: ID of the current project.
:type project_id:
:rtype: PredictionStatus
"""
try:
db_instance = DatabaseConnector.get_db_instance()
predicted_network = db_instance.get_predicted_network_by_id(
'project_id', project_id)
predicted_network_id = predicted_network['predicted_network_id']
prediction_status = db_instance.get_last_linkprediction_status_by_id(
'predicted_network_id', predicted_network_id)
return PredictionStatus(prediction_status['status_id'],
prediction_status['log_timestamp'],
prediction_status['current_step'],
prediction_status['max_steps'],
prediction_status['process_step'],
prediction_status['status_value'])
except Exception as error:
return ('Exception', error)
def get_original_network_by_project(project_id): # noqa: E501
"""Find original network by a project ID.
Returns the original network. # noqa: E501
:param project_id: ID of the current project.
:type project_id:
:rtype: OriginalNetwork
"""
try:
db = DatabaseConnector.get_db_instance()
original_network = db.get_original_network_by_id(
'project_id', project_id)
nodes = db.get_nodes_by_id('original_network_id',
original_network['original_network_id'])
edges = db.get_edges_of_original_network_by_id(
'original_network_id', original_network['original_network_id'])
return OriginalNetwork(id=original_network['original_network_id'],
designation=original_network['designation'],
directed=original_network['directed'],
multigraph=original_network['multigraph'],
node_count=len(nodes),
edge_count=len(edges))
except Exception as error:
return ('Exception', error)
def occupation_similarity(u_attr: str, v_attr: str):
db = DatabaseConnector.get_db_instance()
u_format = _get_occupation_format(u_attr)
v_format = _get_occupation_format(v_attr)
if u_format is None or v_format is None:
raise ValueError('Occupation formatting is wrong!')
if len(u_format) == 2:
u_occupations = db.get_occupations_by_column(*u_format)
else:
u_occupations = [db.get_occupation_by_hierarchy(*u_format)]
if len(v_format) == 2:
v_occupations = db.get_occupations_by_column(*v_format)
else:
v_occupations = [db.get_occupation_by_hierarchy(*v_format)]
u_record, v_record = _choose_correct_hierarchy(u_occupations,
v_occupations)
if u_record['job_id'] == 0 or v_record['job_id'] == 0:
return 0
if u_record['job_id'] == v_record['job_id']:
return 1
similarity_score = 0
if u_record['field_of_activity'] == v_record['field_of_activity']:
similarity_score += 0.3
if u_record['subject_area'] == v_record['subject_area']:
similarity_score += 0.3
similarity_score += 0.4 * _get_competence_similarity(
u_competences=u_record['competences'],
v_competences=v_record['competences'])
return similarity_score
def _save_predicted_graph(self, predicted_graph_train, predicted_graph_test):
self.monitor.notify('Processing')
pred_net = DatabaseConnector.get_db_instance().get_predicted_network_by_id('project_id', self.project_id)
if self.validation:
save_predicted_graph_to_db(predicted_graph_test, pred_net['predicted_network_id'])
else:
save_predicted_graph_to_db(predicted_graph_train, pred_net['predicted_network_id'])
self.monitor.notify('Finished')
def get_predictors_by_project(project_id): # noqa: E501
"""Find predictors by project ID.
Returns all available and selected predictors # noqa: E501
:param project_id: ID of the current project.
:type project_id:
:rtype: Predictors
"""
try:
db_instance = DatabaseConnector.get_db_instance()
predicted_network = db_instance.get_predicted_network_by_id(
'project_id', project_id)
predicted_network_id = predicted_network['predicted_network_id']
standard_features = db_instance.get_standard_network_features()
standard_feature_list = []
exogenous_attributes = db_instance.get_distinct_node_attributes_by_id(
'project_id', project_id)
exogenous_attributes = [
attr for attr in exogenous_attributes
if attr in ATTR_HANDLING and ATTR_HANDLING[attr] is not None
]
exogenous_attributes_params = [{
'attribute': attr,
'value': 1
} for attr in exogenous_attributes]
for standard_feature in standard_features:
if standard_feature[
'feature_type'] == 'Social Theory with exogenous Attributes':
standard_feature['parameters'][
'attribute_weightings'] = exogenous_attributes_params
standard_feature_list.append(
Predictor(id=standard_feature['standard_feature_id'],
designation=standard_feature['designation'],
category=standard_feature['feature_type'],
parameters=standard_feature['parameters']))
selected_features = db_instance.get_selected_network_features_by_id(
id_type='predicted_network_id', reference_id=predicted_network_id)
selected_feature_list = []
for selected_feature in selected_features:
selected_feature_list.append(
Predictor(id=selected_feature['selected_feature_id'],
designation=selected_feature['designation'],
category=selected_feature['feature_type'],
parameters=selected_feature['parameters']))
return Predictors(available_predictors=standard_feature_list,
selected_predictors=selected_feature_list,
evaluation_setup=EvaluationSetup(
random_seed=42,
with_validation=False,
train_sampling_ratio=0.7))
except Exception as error:
return ('Exception', error)
def delete_project_by_id(project_id): # noqa: E501
"""Delete project by an ID.
Deletes a project by an ID. # noqa: E501
:param project_id: ID of the project to delete.
:type project_id:
:rtype: None
"""
try:
db = DatabaseConnector.get_db_instance()
db.delete_project(project_id)
return f'Deleted project with ID {project_id}'
except Exception as error:
return ('Exception', error)
def delete_predicted_network_by_project(project_id): # noqa: E501
"""Delete predicted network of by a project ID.
Deletes predicted network of a project. # noqa: E501
:param project_id: ID of the current project.
:type project_id:
:rtype: None
"""
try:
db = DatabaseConnector.get_db_instance()
db.delete_predicted_network_by_id('project_id', project_id)
return f'Deleted predicted network with ProjectID {project_id}'
except Exception as error:
return ('Exception', error)
def create_prediction_setup(project_id, body): # noqa: E501
"""Creates a prediction.
Creates a predictors setup. # noqa: E501
:param project_id: ID of the current project.
:type project_id:
:param prediction_setup:
:type prediction_setup: dict | bytes
:rtype: None
"""
try:
db_instance = DatabaseConnector.get_db_instance()
predicted_network = db_instance.get_predicted_network_by_id(
'project_id', project_id)
predicted_network_id = predicted_network['predicted_network_id']
for predictor in body['selected_predictors']:
db_instance.add_selected_network_feature_to_project(
designation=predictor["designation"],
feature_type=predictor["category"],
parameters=predictor["parameters"],
predicted_network_id=predicted_network_id)
evaluation_setup_old = db_instance.get_evaluation_result_by_id(
'project_id', project_id)
evaluation_setup = body['evaluation_setup']
if 'train_results' in evaluation_setup_old['result_data']:
evaluation_setup['train_results'] = evaluation_setup_old[
'result_data']['train_results']
evaluation_setup['test_results'] = evaluation_setup_old[
'result_data']['test_results']
evaluation_setup['timestamp'] = evaluation_setup_old[
'result_data']['timestamp']
db_instance.add_or_update_evaluation_result(
project_id, json.dumps(evaluation_setup))
return 'Created prediction!'
except Exception as error:
return ('Exception', error)
def get_project_by_id(project_id): # noqa: E501
"""Find project by an ID.
Returns a project by an ID. # noqa: E501
:param project_id: ID of the project to return.
:type project_id:
:rtype: Project
"""
try:
db = DatabaseConnector.get_db_instance()
project_data = db.get_project_by_id('project_id', project_id)
return Project(id=project_data['project_id'],
designation=project_data['designation'],
description=project_data['description'],
original_network_id=project_data['original_network_id']
# predicted_network_id
)
except Exception as error:
return ('Exception', error)
def get_predicted_network_by_project(project_id): # noqa: E501
"""Find predicted network by a project ID.
Returns the predicted network. # noqa: E501
:param project_id: ID of the current project.
:type project_id:
:rtype: PredictedNetwork
"""
try:
db = DatabaseConnector.get_db_instance()
predicted_network = db.get_predicted_network_by_id(
'project_id', project_id)
predicted_graph = load_predicted_graph_from_db(
predicted_network['predicted_network_id'])
return PredictedNetwork(nodes=predicted_graph['nodes'],
links=predicted_graph['links'],
information=predicted_graph['information'])
except Exception as error:
return ('Exception', error)
def get_evaluation_results_by_project(project_id): # noqa: E501
"""Find evaluation results by project ID.
Returns evaluation results of a project. # noqa: E501
:param project_id: ID of the current project.
:type project_id:
:rtype: EvaluationResults
"""
try:
db_instance = DatabaseConnector.get_db_instance()
evaluation_result = db_instance.get_evaluation_result_by_id(
'project_id', project_id)
timestamp = None
if 'timestamp' in evaluation_result['result_data']:
timestamp = evaluation_result['result_data']['timestamp']
return EvaluationResults(timestamp=timestamp,
results=evaluation_result['result_data'])
except Exception as error:
return ('Exception', error)
def delete_prediction_setup(project_id): # noqa: E501
"""Delete selected prediction setup of a project.
Delete prediction setup of a project. # noqa: E501
:param project_id: ID of the current project.
:type project_id:
:rtype: None
"""
try:
db_instance = DatabaseConnector.get_db_instance()
predicted_network = db_instance.get_predicted_network_by_id(
'project_id', project_id)
predicted_network_id = predicted_network['predicted_network_id']
prediction_features = db_instance.get_selected_network_features_by_id(
'predicted_network_id', predicted_network_id)
for predictor in prediction_features:
db_instance.delete_selected_network_features_by_id(
'predicted_network_id', predicted_network_id)
return 'Deleted prediction features!'
except Exception as error:
return ('Exception', error)
def get_projects(): # noqa: E501
"""Returns a list of available projects.
Get all projects as an array. # noqa: E501
:rtype: List[Project]
"""
try:
db = DatabaseConnector.get_db_instance()
projects_data = db.get_projects()
project_instances = []
for project_data in projects_data:
project_instances.append(
Project(
id=project_data['project_id'],
designation=project_data['designation'],
description=project_data['description'],
original_network_id=project_data['original_network_id'],
predicted_network_id=project_data['predicted_network_id']))
return project_instances
except Exception as error:
return ('Exception', error)
def _update(self, data):
DatabaseConnector.get_db_instance().add_linkprediction_status(
data['process_id'], data['step_index'], data['max_steps'],
data['name'], data['status'], data['id_type'],
data['reference_id'])
def create_project(**kwargs): # noqa: E501
"""Creates a project with an original network file.
Creates a project with an original network file. # noqa: E501
:param designation:
:type designation: str
:param description:
:type description: str
:param network_designation:
:type network_designation: str
:param network_directed:
:type network_directed: bool
:param network_multigraph:
:type network_multigraph: bool
:param network_file: Binary object which contains the network file with a standard network format.
:type network_file: str
:param additional_network_file: Binary object which contains an additional network file with a standard network format (especailly used for CSV imports).
:type additional_network_file: str
:param file_format:
:type file_format: str
:rtype: Project
"""
body = dict(kwargs.items()).get('body')
file = dict(kwargs.items()).get('network_file')
additional_file = dict(kwargs.items()).get('additional_network_file')
# Try to process and safe the file before accessing the Database
try:
file_format = body.get('file_format')
network_file = NetworkFile(file_format, file, additional_file)
node_list = network_file.parse_nodes()
except Exception:
logging.exception("Exception while handling the input file")
e = http_exceptions.InternalServerError(
description=
'Something went wrong! Please check if your network file is correct.'
)
raise e
try:
db = DatabaseConnector.get_db_instance()
project_id = db.add_project(designation=body.get('designation'),
description=body.get('description'))
original_network_id = db.add_original_network_to_project(
designation=body.get('network_designation'),
directed=body.get('network_directed'),
multigraph=body.get('network_multigraph'),
project_id=project_id)
predicted_network_id = db.add_predicted_network_to_project(
designation=body.get('network_designation'), project_id=project_id)
nodes = db.add_nodes(node_list, original_network_id,
predicted_network_id)
edge_list = network_file.parse_edges(nodes)
db.add_edges_to_original_network(edge_list, original_network_id)
for node in nodes:
attribute_list = network_file.parse_attributes(node[0])
if attribute_list:
db.add_node_attributes(attribute_list, node[1])
graph = build_original_graph('project_id', project_id)
save_predicted_graph_to_db(graph.copy(), predicted_network_id)
default_evaluation_setup = {
"random_seed": 42,
"with_validation": False,
"train_sampling_ratio": 0.8,
"test_sampling_ratio": 0.9,
"ml_preprocessing": False
}
db.add_or_update_evaluation_result(project_id,
default_evaluation_setup)
return Project(id=project_id,
designation=body.get('designation'),
description=body.get('description'),
original_network_id=original_network_id,
predicted_network_id=predicted_network_id)
except Exception:
logging.exception(
"Exception occured while inserting data in the database")
e = http_exceptions.InternalServerError(
description=
'Something went wrong! The input file seems to be wrong and the data could not be loaded into the database.'
)
raise e
def predict(self):
try:
self.monitor.pending()
# PIPELINE - PREPARATION
ground_truth_graph_h = build_original_graph('project_id', self.project_id, 'hierarchical')
ground_truth_graph_f = hierarchical_to_flat(ground_truth_graph_h)
train_graph_f, test_graph_f = self._sample_graphs(ground_truth_graph_f)
train_missing_edges, test_missing_edges = self._get_missing_edges(ground_truth_graph_f, train_graph_f, test_graph_f)
train_set, test_set = self._prepare_labels(ground_truth_graph_f, test_graph_f, train_missing_edges, test_missing_edges)
train_graph_h = flat_to_hierarchical(train_graph_f)
predicted_graph_train = train_graph_h.copy()
test_graph_h = None
predicted_graph_test = None
if self.validation:
test_graph_h = flat_to_hierarchical(test_graph_f)
predicted_graph_test = test_graph_h.copy()
# PIPELINE - TOPOLOGY
train_t_df, test_t_df = self._topology_pipeline(ground_truth_graph_f, train_graph_f, test_graph_f, train_set, test_set)
# PIPELINE - SOCIALTHEORY
train_st_df, test_st_df = self._socialtheory_pipeline(train_graph_h, test_graph_h, train_set, test_set, predicted_graph_train, predicted_graph_test)
# PIPELINE - CLASSIFICATION
train_features_df = pd.concat([train_t_df, train_st_df], axis=1)
test_features_df = None
if not test_t_df is None:
test_features_df = pd.concat([test_t_df, test_st_df], axis=1)
train_c_df, test_c_df = self._classification_pipeline(train_features_df, test_features_df)
# CREATE PREDICTED GRAPH
self._add_topology_to_predicted_graph(train_t_df, test_t_df, predicted_graph_train, predicted_graph_test)
self._add_classification_to_predicted_graph(train_set.node_pairs, train_c_df, test_c_df, predicted_graph_train, predicted_graph_test)
train_final = pd.concat([train_set.node_pairs, train_c_df], axis=1)
train_final = pd.concat([train_set.label, train_final], axis=1)
test_final = None
if not test_c_df is None:
test_final = pd.concat([test_set.node_pairs, test_c_df], axis=1)
test_final = pd.concat([test_set.label, test_final], axis=1)
self._save_predicted_graph(predicted_graph_train, predicted_graph_test)
# PIPELINE - EVALUATION
results_train, results_test = self._create_results(
train_final, test_final)
db_instance = DatabaseConnector.get_db_instance()
evaluation_model = db_instance.get_evaluation_result_by_id('project_id', self.project_id)
evaluation_data = evaluation_model['result_data']
evaluation_data['timestamp'] = datetime.datetime.now().timestamp()
evaluation_data['train_results'] = results_train
evaluation_data['test_results'] = results_test
db_instance.add_or_update_evaluation_result(self.project_id, evaluation_data)
self.monitor.finished()
except Exception as e:
print(e)
self.monitor.failed()
def build_original_graph(id_type, reference_id, return_type='hierarchical'):
"""
id_type: possible values = ['original_network_id', 'project_id']
reference_id: value of the id
return_type:
hierarchical -> returns original_graph_hierarchical
flat -> returns original_graph_flat
both -> returns (original_graph_hierarchical, original_graph_flat)
"""
if id_type not in ['original_network_id', 'project_id']:
raise ValueError('Parameter id_type is not valid!')
if return_type not in ['hierarchical', 'flat', 'both']:
raise ValueError('Parameter return_type is not valid!')
try:
db = DatabaseConnector.get_db_instance()
nodes = db.get_nodes_by_id(id_type, reference_id)
uuid_to_id = {
node['node_id']: node['node_network_id']
for node in nodes
}
edges = db.get_edges_of_original_network_by_id(id_type, reference_id)
edges_flat = edges.copy()
edges_hierarchical = edges.copy()
original_graph_flat = DiGraph()
original_graph_hierarchical = DiGraph()
for node in nodes:
if return_type == 'hierarchical' or return_type == 'both':
node_attributes = db.get_node_attributes_by_id(
'node_id', node['node_id'])
kv_attributes = {
record['attribute_name']: record['attribute_value']
for record in node_attributes
}
original_graph_hierarchical.add_node(
node_for_adding=node['node_network_id'],
identifiers={**node},
**kv_attributes)
if return_type == 'flat' or return_type == 'both':
original_graph_flat.add_node(
node_for_adding=node['node_network_id'])
if return_type == 'hierarchical' or return_type == 'both':
for edge in edges_hierarchical:
source_node_record = next(
filter(lambda x: x['node_id'] == edge['source_node'],
nodes))
target_node_record = next(
filter(lambda x: x['node_id'] == edge['target_node'],
nodes))
sub_edges = [{
'source': source_node_record['node_network_id'],
'target': target_node_record['node_network_id'],
'predicted': False
}]
rev_edge = next(
filter(
lambda x: x['target_node'] == edge['source_node'] and
x['source_node'] == edge['target_node'], edges), None)
if rev_edge is not None:
sub_edges.append({
'source':
target_node_record['node_network_id'],
'target':
source_node_record['node_network_id'],
'predicted':
False
})
edges_hierarchical.remove(rev_edge)
edge[uuid_to_id[edge['source_node']]] = edge['source_node']
edge[uuid_to_id[edge['target_node']]] = edge['target_node']
original_graph_hierarchical.add_edge(
u_of_edge=source_node_record['node_network_id'],
v_of_edge=target_node_record['node_network_id'],
identifiers={**edge},
edges=sub_edges,
edge_color=COLOR_ORIGINAL_ONLY)
if return_type == 'flat' or return_type == 'both':
for edge in edges_flat:
source_node_record = next(
filter(lambda x: x['node_id'] == edge['source_node'],
nodes))
target_node_record = next(
filter(lambda x: x['node_id'] == edge['target_node'],
nodes))
edge[uuid_to_id[edge['source_node']]] = edge['source_node']
edge[uuid_to_id[edge['target_node']]] = edge['target_node']
original_graph_flat.add_edge(
u_of_edge=source_node_record['node_network_id'],
v_of_edge=target_node_record['node_network_id'],
identifiers={**edge},
edge_color=COLOR_ORIGINAL_ONLY,
predicted=False)
if return_type == 'flat':
return original_graph_flat
if return_type == 'hierarchical':
return original_graph_hierarchical
if return_type == 'both':
return (original_graph_hierarchical, original_graph_flat)
except Exception as error:
print(error)
return ('Exception', error)