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How to use nested_match method in refurb

Best Python code snippet using refurb_python

base.py

1# Copyright 2011-2013 Colin Scott2# Copyright 2011-2013 Andreas Wundsam3#4# Licensed under the Apache License, Version 2.0 (the "License");5# you may not use this file except in compliance with the License.6# You may obtain a copy of the License at:7#8#     http://www.apache.org/licenses/LICENSE-2.09#10# Unless required by applicable law or agreed to in writing, software11# distributed under the License is distributed on an "AS IS" BASIS,12# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.13# See the License for the specific language governing permissions and14# limitations under the License.15import abc16class Fingerprint(object):17  __metaclass__ = abc.ABCMeta18  # This should really be a protected constructor19  def __init__(self, field2value):20    # Make sure to convert arrays to tuples, since we need __hash__()21    for field, value in field2value.iteritems():22      if type(value) == list:23        field2value[field] = tuple(value)24    self._field2value = field2value25  def to_dict(self):26    flattened = {}27    for field, value in self._field2value.iteritems():28      if 'to_dict' in dir(value):29        flattened[field] = value.to_dict()30      else:31        flattened[field] = value32    return flattened33  def check_match(self, match):34    ''' Return whether this fingerprint matches the pattern in match.35    match must be of the form (key, value, nested_match), where key and value36    are members of self._field2value to match on, and nested_match is either37    None or a tuple (nest_key, match pattern) to match on recursively.38    This method differs from __eq__ in that it will return True if a39    subset (specified in match)  of fields are equal, whereas __eq__ requires40    every field to match.41    # TODO(cs): an arguably cleaner way to implement this would be to support42    # wildcarded fields in __eq__.43    '''44    (key, value, nested_match) = match45    if key not in self._field2value:46      return False47    if value != self._field2value[key]:48      return False49    if nested_match is None:50      return True51    (nested_key, match) = nested_match52    nested_fingerprint = self._field2value[nested_key]53    if nested_fingerprint == ():54      return True55    return nested_fingerprint.check_match(match)56  @abc.abstractmethod57  def __hash__(self):58    pass59  @abc.abstractmethod60  def __eq__(self, other):61    pass62  def __getitem__(self, key):63    return self._field2value[key]64  def __ne__(self, other):65    # NOTE: __ne__ in python does *NOT* by default delegate to eq66    return not self.__eq__(other)67  def __str__(self):68    return str(self._field2value)69  def __repr__(self):...

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