Mercurial > piecrust2

annotate piecrust/data/base.py @ 228:8015fb40c28b

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data: Fix typos and stupid errors.
author Ludovic Chabant <ludovic@chabant.com>
date Wed, 11 Feb 2015 08:21:40 -0800
parents e9dc18a275ff
children eaf18442bff8
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
3
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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1 import time
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2 import logging
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3 from piecrust.data.assetor import Assetor
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4 from piecrust.uriutil import get_slug
3
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5
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6
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7 logger = logging.getLogger(__name__)
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8
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9
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10 class IPaginationSource(object):
12
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11 """ Defines the interface for a source that can be used as the data
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12 for an iterator or a pagination.
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13 """
6
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14 def getItemsPerPage(self):
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15 raise NotImplementedError()
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16
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17 def getSourceIterator(self):
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18 raise NotImplementedError()
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19
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20 def getSorterIterator(self, it):
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21 raise NotImplementedError()
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22
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23 def getTailIterator(self, it):
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24 raise NotImplementedError()
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25
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26 def getPaginationFilter(self, page):
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27 raise NotImplementedError()
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28
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29 def getSettingAccessor(self):
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30 raise NotImplementedError()
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31
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32
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33 class LazyPageConfigData(object):
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34 """ An object that represents the configuration header of a page,
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35 but also allows for additional data. It's meant to be exposed
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36 to the templating system.
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37 """
12
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38 debug_render = []
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39 debug_render_dynamic = ['_debugRenderKeys']
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40
3
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41 def __init__(self, page):
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42 self._page = page
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43 self._values = None
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44 self._loaders = None
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45
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46 @property
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47 def page(self):
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48 return self._page
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49
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50 def get(self, name):
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51 try:
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52 return self._getValue(name)
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53 except KeyError:
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54 return None
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55
12
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56 def __getattr__(self, name):
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57 try:
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58 return self._getValue(name)
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59 except KeyError:
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60 raise AttributeError
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61
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62 def __getitem__(self, name):
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63 return self._getValue(name)
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64
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65 def _getValue(self, name):
3
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66 self._load()
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67
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68 if self._loaders:
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69 loader = self._loaders.get(name)
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70 if loader is not None:
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71 try:
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72 self._values[name] = loader(self, name)
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73 except Exception as ex:
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74 raise Exception(
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75 "Error while loading attribute '%s' for: %s" %
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76 (name, self._page.rel_path)) from ex
3
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77
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78 # We need to double-check `_loaders` here because
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79 # the loader could have removed all loaders, which
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80 # would set this back to `None`.
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81 if self._loaders is not None:
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82 del self._loaders[name]
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83 if len(self._loaders) == 0:
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84 self._loaders = None
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85
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86 return self._values[name]
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87
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88 def _setValue(self, name, value):
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89 if self._values is None:
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90 raise Exception("Can't call _setValue before this data has been "
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91 "loaded")
3
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92 self._values[name] = value
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93
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94 def mapLoader(self, attr_name, loader):
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95 if loader is None:
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96 if self._loaders is None or attr_name not in self._loaders:
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97 return
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98 del self._loaders[attr_name]
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99 if len(self._loaders) == 0:
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100 self._loaders = None
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101 return
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102
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103 if self._loaders is None:
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104 self._loaders = {}
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105 if attr_name in self._loaders:
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106 raise Exception(
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107 "A loader has already been mapped for: %s" % attr_name)
3
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108 self._loaders[attr_name] = loader
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109
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110 def _load(self):
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111 if self._values is not None:
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112 return
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113 self._values = dict(self._page.config.get())
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114 try:
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115 self._loadCustom()
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116 except Exception as ex:
158
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117 raise Exception(
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118 "Error while loading data for: %s" %
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119 self._page.rel_path) from ex
3
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120
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121 def _loadCustom(self):
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122 pass
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123
12
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124 def _debugRenderKeys(self):
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125 self._load()
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126 keys = set(self._values.keys())
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127 if self._loaders:
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128 keys |= set(self._loaders.keys())
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129 return list(keys)
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130
3
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131
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132 class PaginationData(LazyPageConfigData):
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133 def __init__(self, page):
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134 super(PaginationData, self).__init__(page)
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135
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136 def _get_uri(self):
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137 page = self._page
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138 route = page.app.getRoute(page.source.name, page.source_metadata)
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139 if route is None:
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140 raise Exception("Can't get route for page: %s" % page.path)
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141 return route.getUri(page.source_metadata, page)
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142
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143 def _loadCustom(self):
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144 page_url = self._get_uri()
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145 self._setValue('url', page_url)
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146 self._setValue('slug', get_slug(self._page.app, page_url))
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147 self._setValue(
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148 'timestamp',
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149 time.mktime(self.page.datetime.timetuple()))
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150 date_format = self.page.app.config.get('site/date_format')
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151 if date_format:
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152 self._setValue('date', self.page.datetime.strftime(date_format))
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153
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154 assetor = Assetor(self.page, page_url)
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155 self._setValue('assets', assetor)
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156
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157 segment_names = self.page.config.get('segments')
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158 for name in segment_names:
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159 self.mapLoader(name, self._load_rendered_segment)
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160
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161 def _load_rendered_segment(self, data, name):
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162 do_render = True
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163 eis = self._page.app.env.exec_info_stack
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164 if eis is not None and eis.hasPage(self._page):
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165 # This is the pagination data for the page that is currently
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166 # being rendered! Inception! But this is possible... so just
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167 # prevent infinite recursion.
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168 do_render = False
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169
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170 assert self is data
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171
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172 if do_render:
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173 uri = self._get_uri()
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174 try:
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175 from piecrust.rendering import (
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176 PageRenderingContext, render_page_segments)
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177 ctx = PageRenderingContext(self._page, uri)
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178 segs = render_page_segments(ctx)
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179 except Exception as e:
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180 raise Exception(
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181 "Error rendering segments for '%s'" % uri) from e
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182 else:
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183 segs = {}
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184 for name in self.page.config.get('segments'):
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185 segs[name] = "<unavailable: current page>"
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186
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187 for k, v in segs.items():
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188 self.mapLoader(k, None)
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189 self._setValue(k, v)
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190
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191 if 'content.abstract' in segs:
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192 self._setValue('content', segs['content.abstract'])
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193 self._setValue('has_more', True)
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194 if name == 'content':
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195 return segs['content.abstract']
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196
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197 return segs[name]
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198