Source code for sas.sasgui.perspectives.fitting.models

"""
    Utilities to manage models
"""
import traceback
import os
import sys
import os.path
# Time is needed by the log method
import time
import datetime
import logging
import py_compile
import shutil
# Explicitly import from the pluginmodel module so that py2exe
# places it in the distribution. The Model1DPlugin class is used
# as the base class of plug-in models.
from sas.sascalc.fit.pluginmodel import Model1DPlugin
from sas.sasgui.guiframe.CategoryInstaller import CategoryInstaller
from sasmodels.sasview_model import load_custom_model, load_standard_models
from sas.sasgui.perspectives.fitting.fitpage import CUSTOM_MODEL


PLUGIN_DIR = 'plugin_models'
PLUGIN_LOG = os.path.join(os.path.expanduser("~"), '.sasview', PLUGIN_DIR,
                          "plugins.log")
PLUGIN_NAME_BASE = '[plug-in] '

[docs]def get_model_python_path(): """ Returns the python path for a model """ return os.path.dirname(__file__)
[docs]def plugin_log(message): """ Log a message in a file located in the user's home directory """ out = open(PLUGIN_LOG, 'a') now = time.time() stamp = datetime.datetime.fromtimestamp(now).strftime('%Y-%m-%d %H:%M:%S') out.write("%s: %s\n" % (stamp, message)) out.close()
def _check_plugin(model, name): """ Do some checking before model adding plugins in the list :param model: class model to add into the plugin list :param name:name of the module plugin :return model: model if valid model or None if not valid """ #Check if the plugin is of type Model1DPlugin if not issubclass(model, Model1DPlugin): msg = "Plugin %s must be of type Model1DPlugin \n" % str(name) plugin_log(msg) return None if model.__name__ != "Model": msg = "Plugin %s class name must be Model \n" % str(name) plugin_log(msg) return None try: new_instance = model() except: msg = "Plugin %s error in __init__ \n\t: %s %s\n" % (str(name), str(sys.exc_type), sys.exc_info()[1]) plugin_log(msg) return None if hasattr(new_instance, "function"): try: value = new_instance.function() except: msg = "Plugin %s: error writing function \n\t :%s %s\n " % \ (str(name), str(sys.exc_type), sys.exc_info()[1]) plugin_log(msg) return None else: msg = "Plugin %s needs a method called function \n" % str(name) plugin_log(msg) return None return model
[docs]def find_plugins_dir(): """ Find path of the plugins directory. The plugin directory is located in the user's home directory. """ dir = os.path.join(os.path.expanduser("~"), '.sasview', PLUGIN_DIR) # If the plugin directory doesn't exist, create it if not os.path.isdir(dir): os.makedirs(dir) # Find paths needed try: # For source if os.path.isdir(os.path.dirname(__file__)): p_dir = os.path.join(os.path.dirname(__file__), PLUGIN_DIR) else: raise except: # Check for data path next to exe/zip file. #Look for maximum n_dir up of the current dir to find plugins dir n_dir = 12 p_dir = None f_dir = os.path.join(os.path.dirname(__file__)) for i in range(n_dir): if i > 1: f_dir, _ = os.path.split(f_dir) plugin_path = os.path.join(f_dir, PLUGIN_DIR) if os.path.isdir(plugin_path): p_dir = plugin_path break if not p_dir: raise # Place example user models as needed if os.path.isdir(p_dir): for file in os.listdir(p_dir): file_path = os.path.join(p_dir, file) if os.path.isfile(file_path): if file.split(".")[-1] == 'py' and\ file.split(".")[0] != '__init__': if not os.path.isfile(os.path.join(dir, file)): shutil.copy(file_path, dir) return dir
[docs]class ReportProblem: """ Class to check for problems with specific values """ def __nonzero__(self): type, value, tb = sys.exc_info() if type is not None and issubclass(type, py_compile.PyCompileError): print "Problem with", repr(value) raise type, value, tb return 1
report_problem = ReportProblem()
[docs]def compile_file(dir): """ Compile a py file """ try: import compileall compileall.compile_dir(dir=dir, ddir=dir, force=1, quiet=report_problem) except: return sys.exc_info()[1] return None
def _findModels(dir): """ Find custom models """ # List of plugin objects dir = find_plugins_dir() # Go through files in plug-in directory if not os.path.isdir(dir): msg = "SasView couldn't locate Model plugin folder %r." % dir logging.warning(msg) return {} plugin_log("looking for models in: %s" % str(dir)) #compile_file(dir) #always recompile the folder plugin logging.info("plugin model dir: %s" % str(dir)) plugins = {} for filename in os.listdir(dir): name, ext = os.path.splitext(filename) if ext == '.py' and not name == '__init__': path = os.path.abspath(os.path.join(dir, filename)) try: model = load_custom_model(path) model.name = PLUGIN_NAME_BASE + model.name plugins[model.name] = model except Exception: msg = traceback.format_exc() msg += "\nwhile accessing model in %r" % path plugin_log(msg) logging.warning("Failed to load plugin %r. See %s for details" % (path, PLUGIN_LOG)) return plugins
[docs]class ModelList(object): """ Contains dictionary of model and their type """ def __init__(self): """ """ self.mydict = {}
[docs] def set_list(self, name, mylist): """ :param name: the type of the list :param mylist: the list to add """ if name not in self.mydict.keys(): self.reset_list(name, mylist)
[docs] def reset_list(self, name, mylist): """ :param name: the type of the list :param mylist: the list to add """ self.mydict[name] = mylist
[docs] def get_list(self): """ return all the list stored in a dictionary object """ return self.mydict
[docs]class ModelManagerBase: """ Base class for the model manager """ ## external dict for models model_combobox = ModelList() ## Dictionary of form factor models form_factor_dict = {} ## dictionary of structure factor models struct_factor_dict = {} ##list of structure factors struct_list = [] ##list of model allowing multiplication by a structure factor multiplication_factor = [] ##list of multifunctional shapes (i.e. that have user defined number of levels multi_func_list = [] ## list of added models -- currently python models found in the plugin dir. plugins = [] ## Event owner (guiframe) event_owner = None last_time_dir_modified = 0 def __init__(self): self.model_dictionary = {} self.stored_plugins = {} self._getModelList()
[docs] def findModels(self): """ find plugin model in directory of plugin .recompile all file in the directory if file were modified """ temp = {} if self.is_changed(): temp = _findModels(dir) self.last_time_dir_modified = time.time() return temp logging.info("plugin model : %s" % str(temp)) return temp
def _getModelList(self): """ List of models we want to make available by default for this application :return: the next free event ID following the new menu events """ # regular model names only self.model_name_list = [] #Build list automagically from sasmodels package for model in load_standard_models(): self.model_dictionary[model.name] = model if model.is_structure_factor: self.struct_list.append(model) if model.is_form_factor: self.multiplication_factor.append(model) if model.is_multiplicity_model: self.multi_func_list.append(model) else: self.model_name_list.append(model.name) #Looking for plugins self.stored_plugins = self.findModels() self.plugins = self.stored_plugins.values() for name, plug in self.stored_plugins.iteritems(): self.model_dictionary[name] = plug self._get_multifunc_models() return 0
[docs] def is_changed(self): """ check the last time the plugin dir has changed and return true is the directory was modified else return false """ is_modified = False plugin_dir = find_plugins_dir() if os.path.isdir(plugin_dir): temp = os.path.getmtime(plugin_dir) if self.last_time_dir_modified < temp: is_modified = True self.last_time_dir_modified = temp return is_modified
[docs] def update(self): """ return a dictionary of model if new models were added else return empty dictionary """ self.plugins = [] new_plugins = self.findModels() if new_plugins: for name, plug in new_plugins.items(): self.stored_plugins[name] = plug self.plugins.append(plug) self.model_dictionary[name] = plug self.model_combobox.set_list(CUSTOM_MODEL, self.plugins) return self.model_combobox.get_list() else: return {}
[docs] def plugins_reset(self): """ return a dictionary of model """ self.plugins = [] new_plugins = _findModels(dir) for name, plug in new_plugins.iteritems(): for stored_name, stored_plug in self.stored_plugins.iteritems(): if name == stored_name: del self.stored_plugins[name] del self.model_dictionary[name] break self.stored_plugins[name] = plug self.plugins.append(plug) self.model_dictionary[name] = plug self.model_combobox.reset_list("Plugin Models", self.plugins) return self.model_combobox.get_list()
def _on_model(self, evt): """ React to a model menu event :param event: wx menu event """ if int(evt.GetId()) in self.form_factor_dict.keys(): from sasmodels.sasview_model import MultiplicationModel self.model_dictionary[MultiplicationModel.__name__] = MultiplicationModel model1, model2 = self.form_factor_dict[int(evt.GetId())] model = MultiplicationModel(model1, model2) else: model = self.struct_factor_dict[str(evt.GetId())]() def _get_multifunc_models(self): """ Get the multifunctional models """ items = [item for item in self.plugins if item.is_multiplicity_model] self.multi_func_list = items
[docs] def get_model_list(self): """ return dictionary of models for fitpanel use """ ## Model_list now only contains attribute lists not category list. ## Eventually this should be in one master list -- read in category ## list then pull those models that exist and get attributes then add ## to list ..and if model does not exist remove from list as now ## and update json file. ## ## -PDB April 26, 2014 # self.model_combobox.set_list("Shapes", self.shape_list) # self.model_combobox.set_list("Shape-Independent", # self.shape_indep_list) self.model_combobox.set_list("Structure Factors", self.struct_list) self.model_combobox.set_list("Plugin Models", self.plugins) self.model_combobox.set_list("P(Q)*S(Q)", self.multiplication_factor) self.model_combobox.set_list("multiplication", self.multiplication_factor) self.model_combobox.set_list("Multi-Functions", self.multi_func_list) return self.model_combobox.get_list()
[docs] def get_model_name_list(self): """ return regular model name list """ return self.model_name_list
[docs] def get_model_dictionary(self): """ return dictionary linking model names to objects """ return self.model_dictionary
[docs]class ModelManager(object): """ implement model """ __modelmanager = ModelManagerBase() cat_model_list = [__modelmanager.model_dictionary[model_name] for model_name \ in __modelmanager.model_dictionary.keys() \ if model_name not in __modelmanager.stored_plugins.keys()] CategoryInstaller.check_install(model_list=cat_model_list)
[docs] def findModels(self): return self.__modelmanager.findModels()
def _getModelList(self): return self.__modelmanager._getModelList()
[docs] def is_changed(self): return self.__modelmanager.is_changed()
[docs] def update(self): return self.__modelmanager.update()
[docs] def plugins_reset(self): return self.__modelmanager.plugins_reset()
[docs] def populate_menu(self, modelmenu, event_owner): return self.__modelmanager.populate_menu(modelmenu, event_owner)
def _on_model(self, evt): return self.__modelmanager._on_model(evt) def _get_multifunc_models(self): return self.__modelmanager._get_multifunc_models()
[docs] def get_model_list(self): return self.__modelmanager.get_model_list()
[docs] def get_model_name_list(self): return self.__modelmanager.get_model_name_list()
[docs] def get_model_dictionary(self): return self.__modelmanager.get_model_dictionary()