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  44.             
    45. 

  45.   <h1>Source code for flask.config</h1><div class="highlight"><pre>
    46. 

  46. <span></span><span class="c1"># -*- coding: utf-8 -*-</span>
    47. 

  47. <span class="sd">&quot;&quot;&quot;</span>
    48. 

  48. <span class="sd">    flask.config</span>
    49. 

  49. <span class="sd">    ~~~~~~~~~~~~</span>
    50. 

  50. 

  51. <span class="sd">    Implements the configuration related objects.</span>
    52. 

  52. 

  53. <span class="sd">    :copyright: (c) 2015 by Armin Ronacher.</span>
    54. 

  54. <span class="sd">    :license: BSD, see LICENSE for more details.</span>
    55. 

  55. <span class="sd">&quot;&quot;&quot;</span>
    56. 

  56. 

  57. <span class="kn">import</span> <span class="nn">os</span>
    58. 

  58. <span class="kn">import</span> <span class="nn">types</span>
    59. 

  59. <span class="kn">import</span> <span class="nn">errno</span>
    60. 

  60. 

  61. <span class="kn">from</span> <span class="nn">werkzeug.utils</span> <span class="k">import</span> <span class="n">import_string</span>
    62. 

  62. <span class="kn">from</span> <span class="nn">._compat</span> <span class="k">import</span> <span class="n">string_types</span><span class="p">,</span> <span class="n">iteritems</span>
    63. 

  63. <span class="kn">from</span> <span class="nn">.</span> <span class="k">import</span> <span class="n">json</span>
    64. 

  64. 

  65. 

  66. <div class="viewcode-block" id="ConfigAttribute"><a class="viewcode-back" href="../../flask/flask.html#flask.app.ConfigAttribute">[docs]</a><span class="k">class</span> <span class="nc">ConfigAttribute</span><span class="p">(</span><span class="nb">object</span><span class="p">):</span>
    67. 

  67.     <span class="sd">&quot;&quot;&quot;Makes an attribute forward to the config&quot;&quot;&quot;</span>
    68. 

  68. 

  69.     <span class="k">def</span> <span class="nf">__init__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">name</span><span class="p">,</span> <span class="n">get_converter</span><span class="o">=</span><span class="kc">None</span><span class="p">):</span>
    70. 

  70.         <span class="bp">self</span><span class="o">.</span><span class="n">__name__</span> <span class="o">=</span> <span class="n">name</span>
    71. 

  71.         <span class="bp">self</span><span class="o">.</span><span class="n">get_converter</span> <span class="o">=</span> <span class="n">get_converter</span>
    72. 

  72. 

  73.     <span class="k">def</span> <span class="nf">__get__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">obj</span><span class="p">,</span> <span class="nb">type</span><span class="o">=</span><span class="kc">None</span><span class="p">):</span>
    74. 

  74.         <span class="k">if</span> <span class="n">obj</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span>
    75. 

  75.             <span class="k">return</span> <span class="bp">self</span>
    76. 

  76.         <span class="n">rv</span> <span class="o">=</span> <span class="n">obj</span><span class="o">.</span><span class="n">config</span><span class="p">[</span><span class="bp">self</span><span class="o">.</span><span class="n">__name__</span><span class="p">]</span>
    77. 

  77.         <span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">get_converter</span> <span class="ow">is</span> <span class="ow">not</span> <span class="kc">None</span><span class="p">:</span>
    78. 

  78.             <span class="n">rv</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">get_converter</span><span class="p">(</span><span class="n">rv</span><span class="p">)</span>
    79. 

  79.         <span class="k">return</span> <span class="n">rv</span>
    80. 

  80. 

  81.     <span class="k">def</span> <span class="nf">__set__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">obj</span><span class="p">,</span> <span class="n">value</span><span class="p">):</span>
    82. 

  82.         <span class="n">obj</span><span class="o">.</span><span class="n">config</span><span class="p">[</span><span class="bp">self</span><span class="o">.</span><span class="n">__name__</span><span class="p">]</span> <span class="o">=</span> <span class="n">value</span></div>
    83. 

  83. 

  84. 

  85. <div class="viewcode-block" id="Config"><a class="viewcode-back" href="../../flask/flask.html#flask.app.Config">[docs]</a><span class="k">class</span> <span class="nc">Config</span><span class="p">(</span><span class="nb">dict</span><span class="p">):</span>
    86. 

  86.     <span class="sd">&quot;&quot;&quot;Works exactly like a dict but provides ways to fill it from files</span>
    87. 

  87. <span class="sd">    or special dictionaries.  There are two common patterns to populate the</span>
    88. 

  88. <span class="sd">    config.</span>
    89. 

  89. 

  90. <span class="sd">    Either you can fill the config from a config file::</span>
    91. 

  91. 

  92. <span class="sd">        app.config.from_pyfile(&#39;yourconfig.cfg&#39;)</span>
    93. 

  93. 

  94. <span class="sd">    Or alternatively you can define the configuration options in the</span>
    95. 

  95. <span class="sd">    module that calls :meth:`from_object` or provide an import path to</span>
    96. 

  96. <span class="sd">    a module that should be loaded.  It is also possible to tell it to</span>
    97. 

  97. <span class="sd">    use the same module and with that provide the configuration values</span>
    98. 

  98. <span class="sd">    just before the call::</span>
    99. 

  99. 

  100. <span class="sd">        DEBUG = True</span>
    101. 

  101. <span class="sd">        SECRET_KEY = &#39;development key&#39;</span>
    102. 

  102. <span class="sd">        app.config.from_object(__name__)</span>
    103. 

  103. 

  104. <span class="sd">    In both cases (loading from any Python file or loading from modules),</span>
    105. 

  105. <span class="sd">    only uppercase keys are added to the config.  This makes it possible to use</span>
    106. 

  106. <span class="sd">    lowercase values in the config file for temporary values that are not added</span>
    107. 

  107. <span class="sd">    to the config or to define the config keys in the same file that implements</span>
    108. 

  108. <span class="sd">    the application.</span>
    109. 

  109. 

  110. <span class="sd">    Probably the most interesting way to load configurations is from an</span>
    111. 

  111. <span class="sd">    environment variable pointing to a file::</span>
    112. 

  112. 

  113. <span class="sd">        app.config.from_envvar(&#39;YOURAPPLICATION_SETTINGS&#39;)</span>
    114. 

  114. 

  115. <span class="sd">    In this case before launching the application you have to set this</span>
    116. 

  116. <span class="sd">    environment variable to the file you want to use.  On Linux and OS X</span>
    117. 

  117. <span class="sd">    use the export statement::</span>
    118. 

  118. 

  119. <span class="sd">        export YOURAPPLICATION_SETTINGS=&#39;/path/to/config/file&#39;</span>
    120. 

  120. 

  121. <span class="sd">    On windows use `set` instead.</span>
    122. 

  122. 

  123. <span class="sd">    :param root_path: path to which files are read relative from.  When the</span>
    124. 

  124. <span class="sd">                      config object is created by the application, this is</span>
    125. 

  125. <span class="sd">                      the application&#39;s :attr:`~flask.Flask.root_path`.</span>
    126. 

  126. <span class="sd">    :param defaults: an optional dictionary of default values</span>
    127. 

  127. <span class="sd">    &quot;&quot;&quot;</span>
    128. 

  128. 

  129.     <span class="k">def</span> <span class="nf">__init__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">root_path</span><span class="p">,</span> <span class="n">defaults</span><span class="o">=</span><span class="kc">None</span><span class="p">):</span>
    130. 

  130.         <span class="nb">dict</span><span class="o">.</span><span class="n">__init__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">defaults</span> <span class="ow">or</span> <span class="p">{})</span>
    131. 

  131.         <span class="bp">self</span><span class="o">.</span><span class="n">root_path</span> <span class="o">=</span> <span class="n">root_path</span>
    132. 

  132. 

  133. <div class="viewcode-block" id="Config.from_envvar"><a class="viewcode-back" href="../../flask/flask.html#flask.app.Config.from_envvar">[docs]</a>    <span class="k">def</span> <span class="nf">from_envvar</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">variable_name</span><span class="p">,</span> <span class="n">silent</span><span class="o">=</span><span class="kc">False</span><span class="p">):</span>
    134. 

  134.         <span class="sd">&quot;&quot;&quot;Loads a configuration from an environment variable pointing to</span>
    135. 

  135. <span class="sd">        a configuration file.  This is basically just a shortcut with nicer</span>
    136. 

  136. <span class="sd">        error messages for this line of code::</span>
    137. 

  137. 

  138. <span class="sd">            app.config.from_pyfile(os.environ[&#39;YOURAPPLICATION_SETTINGS&#39;])</span>
    139. 

  139. 

  140. <span class="sd">        :param variable_name: name of the environment variable</span>
    141. 

  141. <span class="sd">        :param silent: set to ``True`` if you want silent failure for missing</span>
    142. 

  142. <span class="sd">                       files.</span>
    143. 

  143. <span class="sd">        :return: bool. ``True`` if able to load config, ``False`` otherwise.</span>
    144. 

  144. <span class="sd">        &quot;&quot;&quot;</span>
    145. 

  145.         <span class="n">rv</span> <span class="o">=</span> <span class="n">os</span><span class="o">.</span><span class="n">environ</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">variable_name</span><span class="p">)</span>
    146. 

  146.         <span class="k">if</span> <span class="ow">not</span> <span class="n">rv</span><span class="p">:</span>
    147. 

  147.             <span class="k">if</span> <span class="n">silent</span><span class="p">:</span>
    148. 

  148.                 <span class="k">return</span> <span class="kc">False</span>
    149. 

  149.             <span class="k">raise</span> <span class="ne">RuntimeError</span><span class="p">(</span><span class="s1">&#39;The environment variable </span><span class="si">%r</span><span class="s1"> is not set &#39;</span>
    150. 

  150.                                <span class="s1">&#39;and as such configuration could not be &#39;</span>
    151. 

  151.                                <span class="s1">&#39;loaded.  Set this variable and make it &#39;</span>
    152. 

  152.                                <span class="s1">&#39;point to a configuration file&#39;</span> <span class="o">%</span>
    153. 

  153.                                <span class="n">variable_name</span><span class="p">)</span>
    154. 

  154.         <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">from_pyfile</span><span class="p">(</span><span class="n">rv</span><span class="p">,</span> <span class="n">silent</span><span class="o">=</span><span class="n">silent</span><span class="p">)</span></div>
    155. 

  155. 

  156. <div class="viewcode-block" id="Config.from_pyfile"><a class="viewcode-back" href="../../flask/flask.html#flask.app.Config.from_pyfile">[docs]</a>    <span class="k">def</span> <span class="nf">from_pyfile</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">filename</span><span class="p">,</span> <span class="n">silent</span><span class="o">=</span><span class="kc">False</span><span class="p">):</span>
    157. 

  157.         <span class="sd">&quot;&quot;&quot;Updates the values in the config from a Python file.  This function</span>
    158. 

  158. <span class="sd">        behaves as if the file was imported as module with the</span>
    159. 

  159. <span class="sd">        :meth:`from_object` function.</span>
    160. 

  160. 

  161. <span class="sd">        :param filename: the filename of the config.  This can either be an</span>
    162. 

  162. <span class="sd">                         absolute filename or a filename relative to the</span>
    163. 

  163. <span class="sd">                         root path.</span>
    164. 

  164. <span class="sd">        :param silent: set to ``True`` if you want silent failure for missing</span>
    165. 

  165. <span class="sd">                       files.</span>
    166. 

  166. 

  167. <span class="sd">        .. versionadded:: 0.7</span>
    168. 

  168. <span class="sd">           `silent` parameter.</span>
    169. 

  169. <span class="sd">        &quot;&quot;&quot;</span>
    170. 

  170.         <span class="n">filename</span> <span class="o">=</span> <span class="n">os</span><span class="o">.</span><span class="n">path</span><span class="o">.</span><span class="n">join</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">root_path</span><span class="p">,</span> <span class="n">filename</span><span class="p">)</span>
    171. 

  171.         <span class="n">d</span> <span class="o">=</span> <span class="n">types</span><span class="o">.</span><span class="n">ModuleType</span><span class="p">(</span><span class="s1">&#39;config&#39;</span><span class="p">)</span>
    172. 

  172.         <span class="n">d</span><span class="o">.</span><span class="n">__file__</span> <span class="o">=</span> <span class="n">filename</span>
    173. 

  173.         <span class="k">try</span><span class="p">:</span>
    174. 

  174.             <span class="k">with</span> <span class="nb">open</span><span class="p">(</span><span class="n">filename</span><span class="p">)</span> <span class="k">as</span> <span class="n">config_file</span><span class="p">:</span>
    175. 

  175.                 <span class="n">exec</span><span class="p">(</span><span class="nb">compile</span><span class="p">(</span><span class="n">config_file</span><span class="o">.</span><span class="n">read</span><span class="p">(),</span> <span class="n">filename</span><span class="p">,</span> <span class="s1">&#39;exec&#39;</span><span class="p">),</span> <span class="n">d</span><span class="o">.</span><span class="n">__dict__</span><span class="p">)</span>
    176. 

  176.         <span class="k">except</span> <span class="ne">IOError</span> <span class="k">as</span> <span class="n">e</span><span class="p">:</span>
    177. 

  177.             <span class="k">if</span> <span class="n">silent</span> <span class="ow">and</span> <span class="n">e</span><span class="o">.</span><span class="n">errno</span> <span class="ow">in</span> <span class="p">(</span><span class="n">errno</span><span class="o">.</span><span class="n">ENOENT</span><span class="p">,</span> <span class="n">errno</span><span class="o">.</span><span class="n">EISDIR</span><span class="p">):</span>
    178. 

  178.                 <span class="k">return</span> <span class="kc">False</span>
    179. 

  179.             <span class="n">e</span><span class="o">.</span><span class="n">strerror</span> <span class="o">=</span> <span class="s1">&#39;Unable to load configuration file (</span><span class="si">%s</span><span class="s1">)&#39;</span> <span class="o">%</span> <span class="n">e</span><span class="o">.</span><span class="n">strerror</span>
    180. 

  180.             <span class="k">raise</span>
    181. 

  181.         <span class="bp">self</span><span class="o">.</span><span class="n">from_object</span><span class="p">(</span><span class="n">d</span><span class="p">)</span>
    182. 

  182.         <span class="k">return</span> <span class="kc">True</span></div>
    183. 

  183. 

  184. <div class="viewcode-block" id="Config.from_object"><a class="viewcode-back" href="../../flask/flask.html#flask.app.Config.from_object">[docs]</a>    <span class="k">def</span> <span class="nf">from_object</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">obj</span><span class="p">):</span>
    185. 

  185.         <span class="sd">&quot;&quot;&quot;Updates the values from the given object.  An object can be of one</span>
    186. 

  186. <span class="sd">        of the following two types:</span>
    187. 

  187. 

  188. <span class="sd">        -   a string: in this case the object with that name will be imported</span>
    189. 

  189. <span class="sd">        -   an actual object reference: that object is used directly</span>
    190. 

  190. 

  191. <span class="sd">        Objects are usually either modules or classes.</span>
    192. 

  192. 

  193. <span class="sd">        Just the uppercase variables in that object are stored in the config.</span>
    194. 

  194. <span class="sd">        Example usage::</span>
    195. 

  195. 

  196. <span class="sd">            app.config.from_object(&#39;yourapplication.default_config&#39;)</span>
    197. 

  197. <span class="sd">            from yourapplication import default_config</span>
    198. 

  198. <span class="sd">            app.config.from_object(default_config)</span>
    199. 

  199. 

  200. <span class="sd">        You should not use this function to load the actual configuration but</span>
    201. 

  201. <span class="sd">        rather configuration defaults.  The actual config should be loaded</span>
    202. 

  202. <span class="sd">        with :meth:`from_pyfile` and ideally from a location not within the</span>
    203. 

  203. <span class="sd">        package because the package might be installed system wide.</span>
    204. 

  204. 

  205. <span class="sd">        :param obj: an import name or object</span>
    206. 

  206. <span class="sd">        &quot;&quot;&quot;</span>
    207. 

  207.         <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">obj</span><span class="p">,</span> <span class="n">string_types</span><span class="p">):</span>
    208. 

  208.             <span class="n">obj</span> <span class="o">=</span> <span class="n">import_string</span><span class="p">(</span><span class="n">obj</span><span class="p">)</span>
    209. 

  209.         <span class="k">for</span> <span class="n">key</span> <span class="ow">in</span> <span class="nb">dir</span><span class="p">(</span><span class="n">obj</span><span class="p">):</span>
    210. 

  210.             <span class="k">if</span> <span class="n">key</span><span class="o">.</span><span class="n">isupper</span><span class="p">():</span>
    211. 

  211.                 <span class="bp">self</span><span class="p">[</span><span class="n">key</span><span class="p">]</span> <span class="o">=</span> <span class="nb">getattr</span><span class="p">(</span><span class="n">obj</span><span class="p">,</span> <span class="n">key</span><span class="p">)</span></div>
    212. 

  212. 

  213. <div class="viewcode-block" id="Config.from_json"><a class="viewcode-back" href="../../flask/flask.html#flask.app.Config.from_json">[docs]</a>    <span class="k">def</span> <span class="nf">from_json</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">filename</span><span class="p">,</span> <span class="n">silent</span><span class="o">=</span><span class="kc">False</span><span class="p">):</span>
    214. 

  214.         <span class="sd">&quot;&quot;&quot;Updates the values in the config from a JSON file. This function</span>
    215. 

  215. <span class="sd">        behaves as if the JSON object was a dictionary and passed to the</span>
    216. 

  216. <span class="sd">        :meth:`from_mapping` function.</span>
    217. 

  217. 

  218. <span class="sd">        :param filename: the filename of the JSON file.  This can either be an</span>
    219. 

  219. <span class="sd">                         absolute filename or a filename relative to the</span>
    220. 

  220. <span class="sd">                         root path.</span>
    221. 

  221. <span class="sd">        :param silent: set to ``True`` if you want silent failure for missing</span>
    222. 

  222. <span class="sd">                       files.</span>
    223. 

  223. 

  224. <span class="sd">        .. versionadded:: 0.11</span>
    225. 

  225. <span class="sd">        &quot;&quot;&quot;</span>
    226. 

  226.         <span class="n">filename</span> <span class="o">=</span> <span class="n">os</span><span class="o">.</span><span class="n">path</span><span class="o">.</span><span class="n">join</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">root_path</span><span class="p">,</span> <span class="n">filename</span><span class="p">)</span>
    227. 

  227. 

  228.         <span class="k">try</span><span class="p">:</span>
    229. 

  229.             <span class="k">with</span> <span class="nb">open</span><span class="p">(</span><span class="n">filename</span><span class="p">)</span> <span class="k">as</span> <span class="n">json_file</span><span class="p">:</span>
    230. 

  230.                 <span class="n">obj</span> <span class="o">=</span> <span class="n">json</span><span class="o">.</span><span class="n">loads</span><span class="p">(</span><span class="n">json_file</span><span class="o">.</span><span class="n">read</span><span class="p">())</span>
    231. 

  231.         <span class="k">except</span> <span class="ne">IOError</span> <span class="k">as</span> <span class="n">e</span><span class="p">:</span>
    232. 

  232.             <span class="k">if</span> <span class="n">silent</span> <span class="ow">and</span> <span class="n">e</span><span class="o">.</span><span class="n">errno</span> <span class="ow">in</span> <span class="p">(</span><span class="n">errno</span><span class="o">.</span><span class="n">ENOENT</span><span class="p">,</span> <span class="n">errno</span><span class="o">.</span><span class="n">EISDIR</span><span class="p">):</span>
    233. 

  233.                 <span class="k">return</span> <span class="kc">False</span>
    234. 

  234.             <span class="n">e</span><span class="o">.</span><span class="n">strerror</span> <span class="o">=</span> <span class="s1">&#39;Unable to load configuration file (</span><span class="si">%s</span><span class="s1">)&#39;</span> <span class="o">%</span> <span class="n">e</span><span class="o">.</span><span class="n">strerror</span>
    235. 

  235.             <span class="k">raise</span>
    236. 

  236.         <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">from_mapping</span><span class="p">(</span><span class="n">obj</span><span class="p">)</span></div>
    237. 

  237. 

  238. <div class="viewcode-block" id="Config.from_mapping"><a class="viewcode-back" href="../../flask/flask.html#flask.app.Config.from_mapping">[docs]</a>    <span class="k">def</span> <span class="nf">from_mapping</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="o">*</span><span class="n">mapping</span><span class="p">,</span> <span class="o">**</span><span class="n">kwargs</span><span class="p">):</span>
    239. 

  239.         <span class="sd">&quot;&quot;&quot;Updates the config like :meth:`update` ignoring items with non-upper</span>
    240. 

  240. <span class="sd">        keys.</span>
    241. 

  241. 

  242. <span class="sd">        .. versionadded:: 0.11</span>
    243. 

  243. <span class="sd">        &quot;&quot;&quot;</span>
    244. 

  244.         <span class="n">mappings</span> <span class="o">=</span> <span class="p">[]</span>
    245. 

  245.         <span class="k">if</span> <span class="nb">len</span><span class="p">(</span><span class="n">mapping</span><span class="p">)</span> <span class="o">==</span> <span class="mi">1</span><span class="p">:</span>
    246. 

  246.             <span class="k">if</span> <span class="nb">hasattr</span><span class="p">(</span><span class="n">mapping</span><span class="p">[</span><span class="mi">0</span><span class="p">],</span> <span class="s1">&#39;items&#39;</span><span class="p">):</span>
    247. 

  247.                 <span class="n">mappings</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">mapping</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span><span class="o">.</span><span class="n">items</span><span class="p">())</span>
    248. 

  248.             <span class="k">else</span><span class="p">:</span>
    249. 

  249.                 <span class="n">mappings</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">mapping</span><span class="p">[</span><span class="mi">0</span><span class="p">])</span>
    250. 

  250.         <span class="k">elif</span> <span class="nb">len</span><span class="p">(</span><span class="n">mapping</span><span class="p">)</span> <span class="o">&gt;</span> <span class="mi">1</span><span class="p">:</span>
    251. 

  251.             <span class="k">raise</span> <span class="ne">TypeError</span><span class="p">(</span>
    252. 

  252.                 <span class="s1">&#39;expected at most 1 positional argument, got </span><span class="si">%d</span><span class="s1">&#39;</span> <span class="o">%</span> <span class="nb">len</span><span class="p">(</span><span class="n">mapping</span><span class="p">)</span>
    253. 

  253.             <span class="p">)</span>
    254. 

  254.         <span class="n">mappings</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">kwargs</span><span class="o">.</span><span class="n">items</span><span class="p">())</span>
    255. 

  255.         <span class="k">for</span> <span class="n">mapping</span> <span class="ow">in</span> <span class="n">mappings</span><span class="p">:</span>
    256. 

  256.             <span class="k">for</span> <span class="p">(</span><span class="n">key</span><span class="p">,</span> <span class="n">value</span><span class="p">)</span> <span class="ow">in</span> <span class="n">mapping</span><span class="p">:</span>
    257. 

  257.                 <span class="k">if</span> <span class="n">key</span><span class="o">.</span><span class="n">isupper</span><span class="p">():</span>
    258. 

  258.                     <span class="bp">self</span><span class="p">[</span><span class="n">key</span><span class="p">]</span> <span class="o">=</span> <span class="n">value</span>
    259. 

  259.         <span class="k">return</span> <span class="kc">True</span></div>
    260. 

  260. 

  261. <div class="viewcode-block" id="Config.get_namespace"><a class="viewcode-back" href="../../flask/flask.html#flask.app.Config.get_namespace">[docs]</a>    <span class="k">def</span> <span class="nf">get_namespace</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">namespace</span><span class="p">,</span> <span class="n">lowercase</span><span class="o">=</span><span class="kc">True</span><span class="p">,</span> <span class="n">trim_namespace</span><span class="o">=</span><span class="kc">True</span><span class="p">):</span>
    262. 

  262.         <span class="sd">&quot;&quot;&quot;Returns a dictionary containing a subset of configuration options</span>
    263. 

  263. <span class="sd">        that match the specified namespace/prefix. Example usage::</span>
    264. 

  264. 

  265. <span class="sd">            app.config[&#39;IMAGE_STORE_TYPE&#39;] = &#39;fs&#39;</span>
    266. 

  266. <span class="sd">            app.config[&#39;IMAGE_STORE_PATH&#39;] = &#39;/var/app/images&#39;</span>
    267. 

  267. <span class="sd">            app.config[&#39;IMAGE_STORE_BASE_URL&#39;] = &#39;http://img.website.com&#39;</span>
    268. 

  268. <span class="sd">            image_store_config = app.config.get_namespace(&#39;IMAGE_STORE_&#39;)</span>
    269. 

  269. 

  270. <span class="sd">        The resulting dictionary `image_store_config` would look like::</span>
    271. 

  271. 

  272. <span class="sd">            {</span>
    273. 

  273. <span class="sd">                &#39;type&#39;: &#39;fs&#39;,</span>
    274. 

  274. <span class="sd">                &#39;path&#39;: &#39;/var/app/images&#39;,</span>
    275. 

  275. <span class="sd">                &#39;base_url&#39;: &#39;http://img.website.com&#39;</span>
    276. 

  276. <span class="sd">            }</span>
    277. 

  277. 

  278. <span class="sd">        This is often useful when configuration options map directly to</span>
    279. 

  279. <span class="sd">        keyword arguments in functions or class constructors.</span>
    280. 

  280. 

  281. <span class="sd">        :param namespace: a configuration namespace</span>
    282. 

  282. <span class="sd">        :param lowercase: a flag indicating if the keys of the resulting</span>
    283. 

  283. <span class="sd">                          dictionary should be lowercase</span>
    284. 

  284. <span class="sd">        :param trim_namespace: a flag indicating if the keys of the resulting</span>
    285. 

  285. <span class="sd">                          dictionary should not include the namespace</span>
    286. 

  286. 

  287. <span class="sd">        .. versionadded:: 0.11</span>
    288. 

  288. <span class="sd">        &quot;&quot;&quot;</span>
    289. 

  289.         <span class="n">rv</span> <span class="o">=</span> <span class="p">{}</span>
    290. 

  290.         <span class="k">for</span> <span class="n">k</span><span class="p">,</span> <span class="n">v</span> <span class="ow">in</span> <span class="n">iteritems</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
    291. 

  291.             <span class="k">if</span> <span class="ow">not</span> <span class="n">k</span><span class="o">.</span><span class="n">startswith</span><span class="p">(</span><span class="n">namespace</span><span class="p">):</span>
    292. 

  292.                 <span class="k">continue</span>
    293. 

  293.             <span class="k">if</span> <span class="n">trim_namespace</span><span class="p">:</span>
    294. 

  294.                 <span class="n">key</span> <span class="o">=</span> <span class="n">k</span><span class="p">[</span><span class="nb">len</span><span class="p">(</span><span class="n">namespace</span><span class="p">):]</span>
    295. 

  295.             <span class="k">else</span><span class="p">:</span>
    296. 

  296.                 <span class="n">key</span> <span class="o">=</span> <span class="n">k</span>
    297. 

  297.             <span class="k">if</span> <span class="n">lowercase</span><span class="p">:</span>
    298. 

  298.                 <span class="n">key</span> <span class="o">=</span> <span class="n">key</span><span class="o">.</span><span class="n">lower</span><span class="p">()</span>
    299. 

  299.             <span class="n">rv</span><span class="p">[</span><span class="n">key</span><span class="p">]</span> <span class="o">=</span> <span class="n">v</span>
    300. 

  300.         <span class="k">return</span> <span class="n">rv</span></div>
    301. 

  301. 

  302.     <span class="k">def</span> <span class="nf">__repr__</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
    303. 

  303.         <span class="k">return</span> <span class="s1">&#39;&lt;</span><span class="si">%s</span><span class="s1"> </span><span class="si">%s</span><span class="s1">&gt;&#39;</span> <span class="o">%</span> <span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">__class__</span><span class="o">.</span><span class="n">__name__</span><span class="p">,</span> <span class="nb">dict</span><span class="o">.</span><span class="n">__repr__</span><span class="p">(</span><span class="bp">self</span><span class="p">))</span></div>
    304. 

  304. </pre></div>
    305. 

  305. 

  306.           </div>
    307. 

  307.         </div>
    308. 

  308.       </div>
    309. 

  309.       <div class="sphinxsidebar" role="navigation" aria-label="main navigation">
    310. 

  310.         <div class="sphinxsidebarwrapper"><div class="relations">
    311. 

  311. <h3>Related Topics</h3>
    312. 

  312. <ul>
    313. 

  313.   <li><a href="../../index.html">Documentation overview</a><ul>
    314. 

  314.   <li><a href="../index.html">Module code</a><ul>
    315. 

  315.   </ul></li>
    316. 

  316.   </ul></li>
    317. 

  317. </ul>
    318. 

  318. </div>
    319. 

  319. <div id="searchbox" style="display: none" role="search">
    320. 

  320.   <h3>Quick search</h3>
    321. 

  321.     <form class="search" action="../../search.html" method="get">
    322. 

  322.       <div><input type="text" name="q" /></div>
    323. 

  323.       <div><input type="submit" value="Go" /></div>
    324. 

  324.       <input type="hidden" name="check_keywords" value="yes" />
    325. 

  325.       <input type="hidden" name="area" value="default" />
    326. 

  326.     </form>
    327. 

  327. </div>
    328. 

  328. <script type="text/javascript">$('#searchbox').show(0);</script>
    329. 

  329.         </div>
    330. 

  330.       </div>
    331. 

  331.       <div class="clearer"></div>
    332. 

  332.     </div>
    333. 

  333.     <div class="footer">
    334. 

  334.       &copy;2016, Author.
    335. 

  335.       
    336. 

  336.       |
    337. 

  337.       Powered by <a href="http://sphinx-doc.org/">Sphinx 1.4.8</a>
    338. 

  338.       &amp; <a href="https://github.com/bitprophet/alabaster">Alabaster 0.7.9</a>
    339. 

  339.       
    340. 

  340.     </div>
    341. 

  341. 

  342.     
    343. 

  343. 

  344.     
    345. 

  345.   </body>
    346. 

  346. </html>
    347.