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Source code for galaxy.tools.recommendations

""" Compute tool recommendations """

import json
import logging
import os

import h5py
import numpy as np
import requests
import yaml

from galaxy.tools.parameters import populate_state
from galaxy.tools.parameters.basic import workflow_building_modes
from galaxy.workflow.modules import module_factory

log = logging.getLogger(__name__)

[docs]class ToolRecommendations():
[docs] def __init__(self): self.tool_recommendation_model_path = None self.admin_tool_recommendations_path = None self.deprecated_tools = dict() self.admin_recommendations = dict() self.model_data_dictionary = dict() self.reverse_dictionary = dict() self.all_tools = dict() self.tool_weights_sorted = dict() self.session = None self.graph = None self.loaded_model = None self.compatible_tools = None self.standard_connections = None self.max_seq_len = 25
[docs] def get_predictions(self, trans, tool_sequence, remote_model_url): """ Compute tool predictions """ recommended_tools = dict() self.__collect_admin_preferences(trans.app.config.admin_tool_recommendations_path) is_set = self.__set_model(trans, remote_model_url) if is_set is True: # get the recommended tools for a tool sequence recommended_tools = self.__compute_tool_prediction(trans, tool_sequence) else: tool_sequence = "" return tool_sequence, recommended_tools
def __set_model(self, trans, remote_model_url): """ Create model and associated dictionaries for recommendations """ if not self.graph: # import moves from the top of file: in case the tool recommendation feature is disabled, # keras is not downloaded because of conditional requirement and Galaxy does not build try: from keras.models import model_from_json import tensorflow as tf except Exception: trans.response.status = 400 return False # set graph and session only once if self.graph is None: self.graph = tf.Graph() self.session = tf.Session(graph=self.graph) model_weights = list() counter_layer_weights = 0 self.tool_recommendation_model_path = self.__download_model(remote_model_url) # read the hdf5 attributes trained_model = h5py.File(self.tool_recommendation_model_path, 'r') model_config = json.loads(trained_model['model_config'][()]) # set tensorflow's graph and session to maintain # consistency between model load and predict methods with self.graph.as_default(): with self.session.as_default(): try: # iterate through all the attributes of the model to find weights of neural network layers for item in trained_model.keys(): if "weight_" in item: weight = trained_model["weight_" + str(counter_layer_weights)][()] model_weights.append(weight) counter_layer_weights += 1 self.loaded_model = model_from_json(model_config) self.loaded_model.set_weights(model_weights) except Exception as e: log.exception(e) trans.response.status = 400 return False # set the dictionary of tools self.model_data_dictionary = json.loads(trained_model['data_dictionary'][()]) self.reverse_dictionary = dict((v, k) for k, v in self.model_data_dictionary.items()) # set the list of compatible tools self.compatible_tools = json.loads(trained_model['compatible_tools'][()]) tool_weights = json.loads(trained_model['class_weights'][()]) self.standard_connections = json.loads(trained_model['standard_connections'][()]) # sort the tools' usage dictionary tool_pos_sorted = [int(key) for key in tool_weights.keys()] for k in tool_pos_sorted: self.tool_weights_sorted[k] = tool_weights[str(k)] # collect ids and names of all the installed tools for tool_id, tool in trans.app.toolbox.tools(): t_id_renamed = tool_id if t_id_renamed.find("/") > -1: t_id_renamed = t_id_renamed.split("/")[-2] self.all_tools[t_id_renamed] = (tool_id, tool.name) return True def __collect_admin_preferences(self, admin_path): """ Collect preferences for recommendations of tools set by admins as dictionaries of deprecated tools and additional recommendations """ if not self.admin_tool_recommendations_path and admin_path is not None: self.admin_tool_recommendations_path = os.path.join(os.getcwd(), admin_path) if os.path.exists(self.admin_tool_recommendations_path): with open(self.admin_tool_recommendations_path) as admin_recommendations: admin_recommendation_preferences = yaml.safe_load(admin_recommendations) if admin_recommendation_preferences: for tool_id in admin_recommendation_preferences: tool_info = admin_recommendation_preferences[tool_id] if 'is_deprecated' in tool_info[0]: self.deprecated_tools[tool_id] = tool_info[0]["text_message"] else: if tool_id not in self.admin_recommendations: self.admin_recommendations[tool_id] = tool_info def __download_model(self, model_url, download_local='database/'): """ Download the model from remote server """ local_dir = os.path.join(os.getcwd(), download_local, 'tool_recommendation_model.hdf5') # read model from remote model_binary = requests.get(model_url) # save model to a local directory with open(local_dir, 'wb') as model_file: model_file.write(model_binary.content) return local_dir def __get_tool_extensions(self, trans, tool_id): """ Get the input and output extensions of a tool """ payload = {'type': 'tool', 'tool_id': tool_id, '_': 'true'} inputs = payload.get('inputs', {}) trans.workflow_building_mode = workflow_building_modes.ENABLED module = module_factory.from_dict(trans, payload) if 'tool_state' not in payload: module_state = {} populate_state(trans, module.get_inputs(), inputs, module_state, check=False) module.recover_state(module_state) inputs = module.get_all_inputs(connectable_only=True) outputs = module.get_all_outputs() input_extensions = list() output_extensions = list() for i_ext in inputs: input_extensions.extend(i_ext['extensions']) for o_ext in outputs: output_extensions.extend(o_ext['extensions']) return input_extensions, output_extensions def __filter_tool_predictions(self, trans, prediction_data, tool_ids, tool_scores, last_tool_name): """ Filter tool predictions based on datatype compatibility and tool connections. Add admin preferences to recommendations. """ last_compatible_tools = list() if last_tool_name in self.compatible_tools: last_compatible_tools = self.compatible_tools[last_tool_name].split(",") prediction_data["is_deprecated"] = False # get the list of datatype extensions of the last tool of the tool sequence _, last_output_extensions = self.__get_tool_extensions(trans, self.all_tools[last_tool_name][0]) prediction_data["o_extensions"] = list(set(last_output_extensions)) t_ids_scores = zip(tool_ids, tool_scores) # form the payload of the predicted tools to be shown for child, score in t_ids_scores: c_dict = dict() for t_id in self.all_tools: # select the name and tool id if it is installed in Galaxy if t_id == child and score > 0.0 and child in last_compatible_tools and child not in self.deprecated_tools: full_tool_id = self.all_tools[t_id][0] pred_input_extensions, _ = self.__get_tool_extensions(trans, full_tool_id) c_dict["name"] = self.all_tools[t_id][1] c_dict["tool_id"] = full_tool_id c_dict["i_extensions"] = list(set(pred_input_extensions)) prediction_data["children"].append(c_dict) break # incorporate preferences set by admins if self.admin_tool_recommendations_path: # filter out deprecated tools t_ids_scores = [(tid, score) for tid, score in zip(tool_ids, tool_scores) if tid not in self.deprecated_tools] # set the property if the last tool of the sequence is deprecated if last_tool_name in self.deprecated_tools: prediction_data["is_deprecated"] = True prediction_data["message"] = self.deprecated_tools[last_tool_name] # add the recommendations given by admins for tool_id in self.admin_recommendations: if last_tool_name == tool_id: admin_recommendations = self.admin_recommendations[tool_id] if trans.app.config.overwrite_model_recommendations is True: prediction_data["children"] = admin_recommendations else: prediction_data["children"].extend(admin_recommendations) break # get the root name for displaying after tool run for t_id in self.all_tools: if t_id == last_tool_name: prediction_data["name"] = self.all_tools[t_id][1] break return prediction_data def __get_predicted_tools(self, base_tools, predictions, topk): """ Get predicted tools. If predicted tools are less in number, combine them with published tools """ intersection = list(set(predictions).intersection(set(base_tools))) return intersection[:topk] def __sort_by_usage(self, t_list, class_weights, d_dict): """ Sort predictions by usage/class weights """ tool_dict = dict() for tool in t_list: t_id = d_dict[tool] tool_dict[tool] = class_weights[t_id] tool_dict = dict(sorted(tool_dict.items(), key=lambda kv: kv[1], reverse=True)) return list(tool_dict.keys()), list(tool_dict.values()) def __separate_predictions(self, base_tools, predictions, last_tool_name, weight_values, topk): """ Get predictions from published and normal workflows """ last_base_tools = list() predictions = predictions * weight_values prediction_pos = np.argsort(predictions, axis=-1) topk_prediction_pos = prediction_pos[-topk:] # get tool ids pred_tool_ids = [self.reverse_dictionary[int(tool_pos)] for tool_pos in topk_prediction_pos] if last_tool_name in base_tools: last_base_tools = base_tools[last_tool_name] if type(last_base_tools).__name__ == "str": # get published or compatible tools for the last tool in a sequence of tools last_base_tools = last_base_tools.split(",") # get predicted tools p_tools = self.__get_predicted_tools(last_base_tools, pred_tool_ids, topk) sorted_c_t, sorted_c_v = self.__sort_by_usage(p_tools, self.tool_weights_sorted, self.model_data_dictionary) return sorted_c_t, sorted_c_v def __compute_tool_prediction(self, trans, tool_sequence): """ Compute the predicted tools for a tool sequences Return a payload with the tool sequences and recommended tools Return an empty payload with just the tool sequence if anything goes wrong within the try block """ topk = trans.app.config.topk_recommendations prediction_data = dict() tool_sequence = tool_sequence.split(",")[::-1] prediction_data["name"] = ",".join(tool_sequence) prediction_data["children"] = list() last_tool_name = tool_sequence[-1] # do prediction only if the last is present in the collections of tools if last_tool_name in self.model_data_dictionary: sample = np.zeros(self.max_seq_len) # get tool names without slashes and create a sequence vector for idx, tool_name in enumerate(tool_sequence): if tool_name.find("/") > -1: tool_name = tool_name.split("/")[-2] try: sample[idx] = int(self.model_data_dictionary[tool_name]) except Exception: log.exception("Failed to find tool %s in model" % (tool_name)) return prediction_data sample = np.reshape(sample, (1, self.max_seq_len)) # boost the predicted scores using tools' usage weight_values = list(self.tool_weights_sorted.values()) # predict next tools for a test path try: # use the same graph and session to predict with self.graph.as_default(): with self.session.as_default(): prediction = self.loaded_model.predict(sample) except Exception as e: log.exception(e) return prediction_data # get dimensions nw_dimension = prediction.shape[1] prediction = np.reshape(prediction, (nw_dimension,)) half_len = int(nw_dimension / 2) # get recommended tools from published workflows pub_t, pub_v = self.__separate_predictions(self.standard_connections, prediction[:half_len], last_tool_name, weight_values, topk) # get recommended tools from normal workflows c_t, c_v = self.__separate_predictions(self.compatible_tools, prediction[half_len:], last_tool_name, weight_values, topk) # combine predictions coming from different workflows # promote recommended tools coming from published workflows # to the top and then show other recommendations pub_t.extend(c_t) pub_v.extend(c_v) # remove duplicates if any pub_t = list(dict.fromkeys(pub_t)) pub_v = list(dict.fromkeys(pub_v)) prediction_data = self.__filter_tool_predictions(trans, prediction_data, pub_t, pub_v, last_tool_name) return prediction_data