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How to use gather_errors method in stestr

Best Python code snippet using stestr_python

chain.py

Source:chain.py

1#!/usr/bin/env python2# -*- coding: utf-8 -*-3#4# OpenBCI - framework for Brain-Computer Interfaces based on EEG signal5# Project was initiated by Magdalena Michalska and Krzysztof Kulewski6# as part of their MSc theses at the University of Warsaw.7# Copyright (C) 2008-2009 Krzysztof Kulewski and Magdalena Michalska8#9# This program is free software: you can redistribute it and/or modify10# it under the terms of the GNU General Public License as published by11# the Free Software Foundation, either version 3 of the License, or12# (at your option) any later version.13#14# This program is distributed in the hope that it will be useful,15# but WITHOUT ANY WARRANTY; without even the implied warranty of16# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the17# GNU General Public License for more details.18#19# You should have received a copy of the GNU General Public License20# along with this program.  If not, see <http://www.gnu.org/licenses/>.21#22# Author:23#     Mateusz KruszyÅski <mateusz.kruszynski@gmail.com>24import traceback25import classification_logging as logger26LOGGER = logger.get_logger("chain", "debug")27class ChainElement(object):28    """Represents an element for Chain object."""29    def __init__(self, class_template, params_sets):30        """Init object, parameters:31        - class_template - a class responding to .process(data) method32        - params_sets - a dictionary with keys contaning every33          class_template`s __init__ parameters and values representing34          alternative values for corresponding parameter, eg:35          for class:36          class A(object):37              def __init__(x,y):38                  ...39          where x is a number and y is a string, we would have:40          ChainElement(A, {'x':[1,2,3], 'y':['a', 'b']})41          For that ChainElement Chain object will create 6 A objects42          with every permutation of init parameters:43          A(1,'a'), A(1,'b'), A(2,'a'), A(2,'b'), A(3,'a'), A(3,'b')44          """45        self.class_template = class_template46        try:47            keys = params_sets.keys()48        except AttributeError:49            self.params = params_sets50        else:51            self.params = []52            self._init_params(params_sets, {}, keys)53    def _init_params(self, params_sets, init_set, keys):54        """Initialize self.params list.55        After that operation self.params should look like:56        [{'x':1, 'y':'a'}, {'x':1, 'y':'b'},..., {'x':3, 'y':'b'}]57        """58        if len(keys) == 0:59            self.params.append(init_set)60            return 61        for i_value in params_sets[keys[0]]:62            d = init_set.copy()63            d[keys[0]] = i_value64            self._init_params(params_sets, d, keys[1:])65        66class Chain(object):67    def __init__(self, *chain_elements):68        self.elements = chain_elements69        self.candidates = None70        self.results = None71        self.errors = []72        self.gather_errors = True73    def process(self, data_set=None, 74                select_winner=True, gather_errors=True):75        self.gather_errors = gather_errors76        self.candidates, self.results = self._process(data_set, 0)77        if select_winner:78            return self._select_winner(self.candidates, self.results)79        else:80            return None, None81    def _select_winner(self, candidates, results):82        best_result = max(results)83        ind = results.index(best_result)84        return candidates[ind], best_result85    def _process(self, data_set, element_index):86        try:87            current_element = self.elements[element_index]88        except IndexError:89            # data_set is a result of process method90            # of the last element in the chain91            return [[]], [data_set]92        ret_candidates = []93        ret_results = []94        for i_params_set in current_element.params:95            obj = current_element.class_template(**i_params_set)96            LOGGER.debug("Start processing with: "+str(obj.__class__)+"("+str(i_params_set)+")")97            if self.gather_errors:98                try:99                    new_data_set = obj.process(data_set)100                except Exception, e:101                    self.errors.append(traceback.format_exc())102                else:103                    candidates, results = self._process(new_data_set, element_index + 1)104                    for i_cand in candidates:105                    # prepend to every list of candidate a current object106                        i_cand.insert(0, obj)107                    ret_candidates += candidates108                    ret_results += results109            else: #dont gather errors110                new_data_set = obj.process(data_set)111                candidates, results = self._process(new_data_set, element_index + 1)112                for i_cand in candidates:113                    # prepend to every list of candidate a current object114                    i_cand.insert(0, obj)115                ret_candidates += candidates116                ret_results += results117                118        return ret_candidates, ret_results119    def print_errors(self):120        print("****************************************************")121        print("*************** Start printing errors **************")122        for er in self.errors:123            print("*********** NEXT ERROR *****************")124            for l in er.splitlines():125                print(l)126        print("*************** End printing errors ****************")127        print("****************************************************")128    def print_candidate(self, candidate):129        print("****************************************************")130        print("*************** Start printing candidate ***********")131        for cnd in candidate:132            c = eval(str(cnd))133            print("****** next candidate **********")134            print("CLASS: "+c['CLASS'])135            for k, v in c.iteritems():136                print(k, ": ", v)137        print("*************** End printing candidate**************")138        print("****************************************************")139        140        ...

package_loader.py

Source:package_loader.py

1# Copyright (c) 2017-2018 The University of Manchester2#3# This program is free software: you can redistribute it and/or modify4# it under the terms of the GNU General Public License as published by5# the Free Software Foundation, either version 3 of the License, or6# (at your option) any later version.7#8# This program is distributed in the hope that it will be useful,9# but WITHOUT ANY WARRANTY; without even the implied warranty of10# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the11# GNU General Public License for more details.12#13# You should have received a copy of the GNU General Public License14# along with this program.  If not, see <http://www.gnu.org/licenses/>.15import os16import sys17import traceback18def all_modules(directory, prefix, remove_pyc_files=False):19    """ List all the python files found in this directory giving then the\20        prefix.21    Any file that ends in either ``.py`` or ``.pyc`` is assume a python module22    and added to the result set.23    :param str directory: path to check for python files24    :param str prefix: package prefix top add to the file name25    :return: set of python package names26    :rtype: set(str)27    """28    results = set()29    for module in os.listdir(directory):30        if module == "__init__.py":31            results.add(prefix)32        elif module == "__init__.pyc":33            results.add(prefix)34            if remove_pyc_files:  # pragma: no cover35                full_path = os.path.join(directory, module)36                print("Deleting: " + full_path)37                os.remove(full_path)38        elif module[-3:] == ".py":39            results.add(prefix + "." + module[:-3])40        elif module[-4:] == ".pyc":41            results.add(prefix + "." + module[:-4])42            if remove_pyc_files:  # pragma: no cover43                full_path = os.path.join(directory, module)44                print("Deleting: " + full_path)45                os.remove(full_path)46        elif module != "__pycache__":47            full_path = os.path.join(directory, module)48            if os.path.isdir(full_path):49                results.update(all_modules(50                    full_path, prefix + "." + module, remove_pyc_files))51    return results52def load_modules(53        directory, prefix, remove_pyc_files=False, exclusions=None,54        gather_errors=True):55    """ Loads all the python files found in this directory, giving them the\56        specified prefix57    Any file that ends in either ``.py`` or ``.pyc`` is assume a python module58    and added to the result set.59    :param str directory: path to check for python files60    :param str prefix: package prefix top add to the file name61    :param bool remove_pyc_files: True if ``.pyc`` files should be deleted62    :param list(str) exclusions: a list of modules to exclude63    :param bool gather_errors:64        True if errors should be gathered, False to report on first error65    :return: None66    """67    if exclusions is None:68        exclusions = []69    modules = all_modules(directory, prefix, remove_pyc_files)70    errors = list()71    for module in modules:72        if module in exclusions:73            print("SKIPPING " + module)74            continue75        print(module)76        try:77            __import__(module)78        except Exception:  # pylint: disable=broad-except79            if gather_errors:80                errors.append((module, sys.exc_info()))81            else:82                raise83    for module, (exc_type, exc_value, exc_traceback) in errors:84        print("Error importing {}:".format(module))85        for line in traceback.format_exception(86                exc_type, exc_value, exc_traceback):87            for line_line in line.split("\n"):88                if line_line:89                    print("  ", line_line.rstrip())90    if errors:91        raise Exception("Error when importing, starting at {}".format(prefix))92def load_module(93        name, remove_pyc_files=False, exclusions=None, gather_errors=True):94    """ Loads this modules and all its children.95    :param str name: name of the modules96    :param bool remove_pyc_files: True if ``.pyc`` files should be deleted97    :param list(str) exclusions: a list of modules to exclude98    :param bool gather_errors:99        True if errors should be gathered, False to report on first error100    :return: None101    """102    if exclusions is None:103        exclusions = []104    module = __import__(name)105    path = module.__file__106    directory = os.path.dirname(path)107    load_modules(directory, name, remove_pyc_files, exclusions, gather_errors)108if __name__ == '__main__':  # pragma: no cover...

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