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<h1>Source code for postgresql.sys</h1><div class="highlight"><pre>
<span class="c">##</span>
<span class="c"># .sys</span>
<span class="c">##</span>
<span class="sd">"""</span>
<span class="sd">py-postgresql system functions and data.</span>
<span class="sd">Data</span>
<span class="sd">----</span>
<span class="sd"> ``libpath``</span>
<span class="sd"> The local file system paths that contain query libraries.</span>
<span class="sd">Overridable Functions</span>
<span class="sd">---------------------</span>
<span class="sd"> excformat</span>
<span class="sd"> Information that makes up an exception's displayed "body".</span>
<span class="sd"> Effectively, the implementation of `postgresql.exception.Error.__str__`</span>
<span class="sd"> msghook</span>
<span class="sd"> Display a message.</span>
<span class="sd">"""</span>
<span class="kn">import</span> <span class="nn">sys</span>
<span class="kn">import</span> <span class="nn">os</span>
<span class="kn">import</span> <span class="nn">traceback</span>
<span class="kn">from</span> <span class="nn">.python.element</span> <span class="kn">import</span> <span class="n">format_element</span>
<span class="kn">from</span> <span class="nn">.python.string</span> <span class="kn">import</span> <span class="n">indent</span>
<span class="n">libpath</span> <span class="o">=</span> <span class="p">[</span><span class="s">'/usr/share/python3-postgresql/'</span><span class="p">,]</span>
<div class="viewcode-block" id="default_errformat"><a class="viewcode-back" href="../../reference.html#postgresql.sys.default_errformat">[docs]</a><span class="k">def</span> <span class="nf">default_errformat</span><span class="p">(</span><span class="n">val</span><span class="p">):</span>
<span class="sd">"""</span>
<span class="sd"> Built-in error formatter. DON'T TOUCH!</span>
<span class="sd"> """</span>
<span class="n">it</span> <span class="o">=</span> <span class="n">val</span><span class="o">.</span><span class="n">_e_metas</span><span class="p">()</span>
<span class="k">if</span> <span class="n">val</span><span class="o">.</span><span class="n">creator</span> <span class="ow">is</span> <span class="ow">not</span> <span class="bp">None</span><span class="p">:</span>
<span class="c"># Protect against element traceback failures.</span>
<span class="k">try</span><span class="p">:</span>
<span class="n">after</span> <span class="o">=</span> <span class="n">os</span><span class="o">.</span><span class="n">linesep</span> <span class="o">+</span> <span class="n">format_element</span><span class="p">(</span><span class="n">val</span><span class="o">.</span><span class="n">creator</span><span class="p">)</span>
<span class="k">except</span> <span class="ne">Exception</span><span class="p">:</span>
<span class="n">after</span> <span class="o">=</span> <span class="s">'Element Traceback of </span><span class="si">%r</span><span class="s"> caused exception:</span><span class="si">%s</span><span class="s">'</span> <span class="o">%</span><span class="p">(</span>
<span class="nb">type</span><span class="p">(</span><span class="n">val</span><span class="o">.</span><span class="n">creator</span><span class="p">)</span><span class="o">.</span><span class="n">__name__</span><span class="p">,</span>
<span class="n">os</span><span class="o">.</span><span class="n">linesep</span>
<span class="p">)</span>
<span class="n">after</span> <span class="o">+=</span> <span class="n">indent</span><span class="p">(</span><span class="n">traceback</span><span class="o">.</span><span class="n">format_exc</span><span class="p">())</span>
<span class="n">after</span> <span class="o">=</span> <span class="n">os</span><span class="o">.</span><span class="n">linesep</span> <span class="o">+</span> <span class="n">indent</span><span class="p">(</span><span class="n">after</span><span class="p">)</span><span class="o">.</span><span class="n">rstrip</span><span class="p">()</span>
<span class="k">else</span><span class="p">:</span>
<span class="n">after</span> <span class="o">=</span> <span class="s">''</span>
<span class="k">return</span> <span class="nb">next</span><span class="p">(</span><span class="n">it</span><span class="p">)[</span><span class="mi">1</span><span class="p">]</span> \
<span class="o">+</span> <span class="n">os</span><span class="o">.</span><span class="n">linesep</span> <span class="o">+</span> <span class="s">' '</span> \
<span class="o">+</span> <span class="p">(</span><span class="n">os</span><span class="o">.</span><span class="n">linesep</span> <span class="o">+</span> <span class="s">' '</span><span class="p">)</span><span class="o">.</span><span class="n">join</span><span class="p">(</span>
<span class="n">k</span> <span class="o">+</span> <span class="s">': '</span> <span class="o">+</span> <span class="n">v</span> <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">it</span>
<span class="p">)</span> <span class="o">+</span> <span class="n">after</span>
</div>
<div class="viewcode-block" id="default_msghook"><a class="viewcode-back" href="../../reference.html#postgresql.sys.default_msghook">[docs]</a><span class="k">def</span> <span class="nf">default_msghook</span><span class="p">(</span><span class="n">msg</span><span class="p">,</span> <span class="n">format_message</span> <span class="o">=</span> <span class="n">format_element</span><span class="p">):</span>
<span class="sd">"""</span>
<span class="sd"> Built-in message hook. DON'T TOUCH!</span>
<span class="sd"> """</span>
<span class="k">if</span> <span class="n">sys</span><span class="o">.</span><span class="n">stderr</span> <span class="ow">and</span> <span class="ow">not</span> <span class="n">sys</span><span class="o">.</span><span class="n">stderr</span><span class="o">.</span><span class="n">closed</span><span class="p">:</span>
<span class="k">try</span><span class="p">:</span>
<span class="n">sys</span><span class="o">.</span><span class="n">stderr</span><span class="o">.</span><span class="n">write</span><span class="p">(</span><span class="n">format_message</span><span class="p">(</span><span class="n">msg</span><span class="p">)</span> <span class="o">+</span> <span class="n">os</span><span class="o">.</span><span class="n">linesep</span><span class="p">)</span>
<span class="k">except</span> <span class="ne">Exception</span><span class="p">:</span>
<span class="k">try</span><span class="p">:</span>
<span class="n">sys</span><span class="o">.</span><span class="n">excepthook</span><span class="p">(</span><span class="o">*</span><span class="n">sys</span><span class="o">.</span><span class="n">exc_info</span><span class="p">())</span>
<span class="k">except</span> <span class="ne">Exception</span><span class="p">:</span>
<span class="c"># gasp.</span>
<span class="k">pass</span>
</div>
<div class="viewcode-block" id="errformat"><a class="viewcode-back" href="../../reference.html#postgresql.sys.errformat">[docs]</a><span class="k">def</span> <span class="nf">errformat</span><span class="p">(</span><span class="o">*</span><span class="n">args</span><span class="p">,</span> <span class="o">**</span><span class="n">kw</span><span class="p">):</span>
<span class="sd">"""</span>
<span class="sd"> Raised Database Error formatter pointing to default_excformat.</span>
<span class="sd"> Override if you like. All postgresql.exceptions.Error's are formatted using</span>
<span class="sd"> this function.</span>
<span class="sd"> """</span>
<span class="k">return</span> <span class="n">default_errformat</span><span class="p">(</span><span class="o">*</span><span class="n">args</span><span class="p">,</span> <span class="o">**</span><span class="n">kw</span><span class="p">)</span>
</div>
<div class="viewcode-block" id="msghook"><a class="viewcode-back" href="../../reference.html#postgresql.sys.msghook">[docs]</a><span class="k">def</span> <span class="nf">msghook</span><span class="p">(</span><span class="o">*</span><span class="n">args</span><span class="p">,</span> <span class="o">**</span><span class="n">kw</span><span class="p">):</span>
<span class="sd">"""</span>
<span class="sd"> Message hook pointing to default_msghook.</span>
<span class="sd"> Override if you like. All untrapped messages raised by</span>
<span class="sd"> driver connections come here to be printed to stderr.</span>
<span class="sd"> """</span>
<span class="k">return</span> <span class="n">default_msghook</span><span class="p">(</span><span class="o">*</span><span class="n">args</span><span class="p">,</span> <span class="o">**</span><span class="n">kw</span><span class="p">)</span>
</div>
<div class="viewcode-block" id="reset_errformat"><a class="viewcode-back" href="../../reference.html#postgresql.sys.reset_errformat">[docs]</a><span class="k">def</span> <span class="nf">reset_errformat</span><span class="p">(</span><span class="n">with_func</span> <span class="o">=</span> <span class="n">errformat</span><span class="p">):</span>
<span class="s">'restore the original excformat function'</span>
<span class="k">global</span> <span class="n">errformat</span>
<span class="n">errformat</span> <span class="o">=</span> <span class="n">with_func</span>
</div>
<div class="viewcode-block" id="reset_msghook"><a class="viewcode-back" href="../../reference.html#postgresql.sys.reset_msghook">[docs]</a><span class="k">def</span> <span class="nf">reset_msghook</span><span class="p">(</span><span class="n">with_func</span> <span class="o">=</span> <span class="n">msghook</span><span class="p">):</span>
<span class="s">'restore the original msghook function'</span>
<span class="k">global</span> <span class="n">msghook</span>
<span class="n">msghook</span> <span class="o">=</span> <span class="n">with_func</span></div>
</pre></div>
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