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<section id="pytermtk-logging">
<h1><a class="reference external" href="https://github.com/ceccopierangiolieugenio/pyTermTk">pyTermTk</a> - Logging<a class="headerlink" href="#pytermtk-logging" title="Permalink to this heading"></a></h1>
<section id="intro">
<h2>Intro<a class="headerlink" href="#intro" title="Permalink to this heading"></a></h2>
<p>The <a class="reference external" href="https://ceccopierangiolieugenio.github.io/pyTermTk/autogen.TermTk/TermTk.TTkCore.log.html">TTkLog</a> class provide a set of api to allow and configure the logging.</p>
</section>
<section id="examples">
<h2>Examples<a class="headerlink" href="#examples" title="Permalink to this heading"></a></h2>
<section id="example-1-log-to-file">
<h3>Example 1 - Log to file<a class="headerlink" href="#example-1-log-to-file" title="Permalink to this heading"></a></h3>
<p>From <a class="reference external" href="https://github.com/ceccopierangiolieugenio/pyTermTk/blob/main/tutorial/logging/example1.logtofile.py">example1.logtofile.py</a>
(<a class="reference external" href="https://ceccopierangiolieugenio.github.io/pyTermTk/sandbox/sandbox.html?filePath=tutorial/logging/example1.logtofile.py">tryItOnline</a>):</p>
<div class="highlight-python notranslate"><div class="highlight"><pre><span></span><span class="kn">import</span> <span class="nn">TermTk</span> <span class="k">as</span> <span class="nn">ttk</span>
<span class="c1"># session.log is used by default</span>
<span class="n">ttk</span><span class="o">.</span><span class="n">TTkLog</span><span class="o">.</span><span class="n">use_default_file_logging</span><span class="p">()</span>
<span class="c1"># Push some Debug messages</span>
<span class="n">ttk</span><span class="o">.</span><span class="n">TTkLog</span><span class="o">.</span><span class="n">info</span><span class="p">(</span> <span class="s2">&quot;Test Info Message&quot;</span><span class="p">)</span>
<span class="n">ttk</span><span class="o">.</span><span class="n">TTkLog</span><span class="o">.</span><span class="n">debug</span><span class="p">(</span> <span class="s2">&quot;Test Debug Message&quot;</span><span class="p">)</span>
<span class="n">ttk</span><span class="o">.</span><span class="n">TTkLog</span><span class="o">.</span><span class="n">error</span><span class="p">(</span> <span class="s2">&quot;Test Error Message&quot;</span><span class="p">)</span>
<span class="n">ttk</span><span class="o">.</span><span class="n">TTkLog</span><span class="o">.</span><span class="n">warn</span><span class="p">(</span> <span class="s2">&quot;Test Warning Message&quot;</span><span class="p">)</span>
<span class="n">ttk</span><span class="o">.</span><span class="n">TTkLog</span><span class="o">.</span><span class="n">critical</span><span class="p">(</span><span class="s2">&quot;Test Critical Message&quot;</span><span class="p">)</span>
</pre></div>
</div>
</section>
<section id="example-2-log-to-stdout">
<h3>Example 2 - Log to stdout<a class="headerlink" href="#example-2-log-to-stdout" title="Permalink to this heading"></a></h3>
<p>From <a class="reference external" href="https://github.com/ceccopierangiolieugenio/pyTermTk/blob/main/tutorial/logging/example2.logtostdout.py">example2.logtostdout.py</a>
(<a class="reference external" href="https://ceccopierangiolieugenio.github.io/pyTermTk/sandbox/sandbox.html?filePath=tutorial/logging/example2.logtostdout.py">tryItOnline</a>):</p>
<div class="highlight-python notranslate"><div class="highlight"><pre><span></span><span class="kn">import</span> <span class="nn">TermTk</span> <span class="k">as</span> <span class="nn">ttk</span>
<span class="n">ttk</span><span class="o">.</span><span class="n">TTkLog</span><span class="o">.</span><span class="n">use_default_stdout_logging</span><span class="p">()</span>
<span class="c1"># Push some Debug messages</span>
<span class="n">ttk</span><span class="o">.</span><span class="n">TTkLog</span><span class="o">.</span><span class="n">info</span><span class="p">(</span> <span class="s2">&quot;Test Info Message&quot;</span><span class="p">)</span>
<span class="n">ttk</span><span class="o">.</span><span class="n">TTkLog</span><span class="o">.</span><span class="n">debug</span><span class="p">(</span> <span class="s2">&quot;Test Debug Message&quot;</span><span class="p">)</span>
<span class="n">ttk</span><span class="o">.</span><span class="n">TTkLog</span><span class="o">.</span><span class="n">error</span><span class="p">(</span> <span class="s2">&quot;Test Error Message&quot;</span><span class="p">)</span>
<span class="n">ttk</span><span class="o">.</span><span class="n">TTkLog</span><span class="o">.</span><span class="n">warn</span><span class="p">(</span> <span class="s2">&quot;Test Warning Message&quot;</span><span class="p">)</span>
<span class="n">ttk</span><span class="o">.</span><span class="n">TTkLog</span><span class="o">.</span><span class="n">critical</span><span class="p">(</span><span class="s2">&quot;Test Critical Message&quot;</span><span class="p">)</span>
<span class="n">ttk</span><span class="o">.</span><span class="n">TTkLog</span><span class="o">.</span><span class="n">fatal</span><span class="p">(</span> <span class="s2">&quot;Test Fatal Message&quot;</span><span class="p">)</span>
</pre></div>
</div>
</section>
<section id="example-3-custom-logging">
<h3>Example 3 - custom logging<a class="headerlink" href="#example-3-custom-logging" title="Permalink to this heading"></a></h3>
<p>From <a class="reference external" href="https://github.com/ceccopierangiolieugenio/pyTermTk/blob/main/tutorial/logging/example3.customlogging.py">example3.customlogging.py</a>
(<a class="reference external" href="https://ceccopierangiolieugenio.github.io/pyTermTk/sandbox/sandbox.html?filePath=tutorial/logging/example3.customlogging.py">tryItOnline</a>):</p>
<div class="highlight-python notranslate"><div class="highlight"><pre><span></span><span class="kn">import</span> <span class="nn">TermTk</span> <span class="k">as</span> <span class="nn">ttk</span>
<span class="c1"># define the callback used to process the log message</span>
<span class="k">def</span> <span class="nf">message_handler</span><span class="p">(</span><span class="n">mode</span><span class="p">,</span> <span class="n">context</span><span class="p">,</span> <span class="n">message</span><span class="p">):</span>
<span class="n">msgType</span> <span class="o">=</span> <span class="s2">&quot;NONE&quot;</span>
<span class="k">if</span> <span class="n">mode</span> <span class="o">==</span> <span class="n">ttk</span><span class="o">.</span><span class="n">TTkLog</span><span class="o">.</span><span class="n">InfoMsg</span><span class="p">:</span> <span class="n">msgType</span> <span class="o">=</span> <span class="s2">&quot;[INFO]&quot;</span>
<span class="k">elif</span> <span class="n">mode</span> <span class="o">==</span> <span class="n">ttk</span><span class="o">.</span><span class="n">TTkLog</span><span class="o">.</span><span class="n">WarningMsg</span><span class="p">:</span> <span class="n">msgType</span> <span class="o">=</span> <span class="s2">&quot;[WARNING]&quot;</span>
<span class="k">elif</span> <span class="n">mode</span> <span class="o">==</span> <span class="n">ttk</span><span class="o">.</span><span class="n">TTkLog</span><span class="o">.</span><span class="n">CriticalMsg</span><span class="p">:</span> <span class="n">msgType</span> <span class="o">=</span> <span class="s2">&quot;[CRITICAL]&quot;</span>
<span class="k">elif</span> <span class="n">mode</span> <span class="o">==</span> <span class="n">ttk</span><span class="o">.</span><span class="n">TTkLog</span><span class="o">.</span><span class="n">FatalMsg</span><span class="p">:</span> <span class="n">msgType</span> <span class="o">=</span> <span class="s2">&quot;[FATAL]&quot;</span>
<span class="k">elif</span> <span class="n">mode</span> <span class="o">==</span> <span class="n">ttk</span><span class="o">.</span><span class="n">TTkLog</span><span class="o">.</span><span class="n">ErrorMsg</span><span class="p">:</span> <span class="n">msgType</span> <span class="o">=</span> <span class="s2">&quot;[ERROR]&quot;</span>
<span class="nb">print</span><span class="p">(</span><span class="sa">f</span><span class="s2">&quot;</span><span class="si">{</span><span class="n">msgType</span><span class="si">}</span><span class="s2"> </span><span class="si">{</span><span class="n">context</span><span class="o">.</span><span class="n">file</span><span class="si">}</span><span class="s2"> </span><span class="si">{</span><span class="n">message</span><span class="si">}</span><span class="s2">&quot;</span><span class="p">)</span>
<span class="c1"># Register the callback to the message handler</span>
<span class="n">ttk</span><span class="o">.</span><span class="n">TTkLog</span><span class="o">.</span><span class="n">installMessageHandler</span><span class="p">(</span><span class="n">message_handler</span><span class="p">)</span>
<span class="c1"># Push some Debug messages</span>
<span class="n">ttk</span><span class="o">.</span><span class="n">TTkLog</span><span class="o">.</span><span class="n">info</span><span class="p">(</span> <span class="s2">&quot;Test Info Message&quot;</span><span class="p">)</span>
<span class="n">ttk</span><span class="o">.</span><span class="n">TTkLog</span><span class="o">.</span><span class="n">debug</span><span class="p">(</span> <span class="s2">&quot;Test Debug Message&quot;</span><span class="p">)</span>
<span class="n">ttk</span><span class="o">.</span><span class="n">TTkLog</span><span class="o">.</span><span class="n">error</span><span class="p">(</span> <span class="s2">&quot;Test Error Message&quot;</span><span class="p">)</span>
<span class="n">ttk</span><span class="o">.</span><span class="n">TTkLog</span><span class="o">.</span><span class="n">warn</span><span class="p">(</span> <span class="s2">&quot;Test Warning Message&quot;</span><span class="p">)</span>
<span class="n">ttk</span><span class="o">.</span><span class="n">TTkLog</span><span class="o">.</span><span class="n">critical</span><span class="p">(</span><span class="s2">&quot;Test Critical Message&quot;</span><span class="p">)</span>
<span class="n">ttk</span><span class="o">.</span><span class="n">TTkLog</span><span class="o">.</span><span class="n">fatal</span><span class="p">(</span> <span class="s2">&quot;Test Fatal Message&quot;</span><span class="p">)</span>
</pre></div>
</div>
</section>
<section id="example-4-use-ttklogviewer-widget">
<h3>Example 4 - Use <a class="reference external" href="https://ceccopierangiolieugenio.github.io/pyTermTk/autogen.TermTk/TermTk.TTkTestWidgets.logviewer.html">TTkLogViewer</a> widget<a class="headerlink" href="#example-4-use-ttklogviewer-widget" title="Permalink to this heading"></a></h3>
<p>From <a class="reference external" href="https://github.com/ceccopierangiolieugenio/pyTermTk/blob/main/tutorial/logging/example4.ttklogviewer.py">example4.ttklogviewer.py</a>
(<a class="reference external" href="https://ceccopierangiolieugenio.github.io/pyTermTk/sandbox/sandbox.html?filePath=tutorial/logging/example4.ttklogviewer.py">tryItOnline</a>):</p>
<div class="highlight-python notranslate"><div class="highlight"><pre><span></span><span class="kn">import</span> <span class="nn">TermTk</span> <span class="k">as</span> <span class="nn">ttk</span>
<span class="n">root</span> <span class="o">=</span> <span class="n">ttk</span><span class="o">.</span><span class="n">TTk</span><span class="p">()</span>
<span class="c1"># Create a window and attach it to the root (parent=root)</span>
<span class="n">logWin</span> <span class="o">=</span> <span class="n">ttk</span><span class="o">.</span><span class="n">TTkWindow</span><span class="p">(</span><span class="n">parent</span><span class="o">=</span><span class="n">root</span><span class="p">,</span><span class="n">pos</span> <span class="o">=</span> <span class="p">(</span><span class="mi">1</span><span class="p">,</span><span class="mi">1</span><span class="p">),</span> <span class="n">size</span><span class="o">=</span><span class="p">(</span><span class="mi">80</span><span class="p">,</span><span class="mi">20</span><span class="p">),</span> <span class="n">title</span><span class="o">=</span><span class="s2">&quot;LogViewer Window&quot;</span><span class="p">,</span> <span class="n">border</span><span class="o">=</span><span class="kc">True</span><span class="p">,</span> <span class="n">layout</span><span class="o">=</span><span class="n">ttk</span><span class="o">.</span><span class="n">TTkVBoxLayout</span><span class="p">())</span>
<span class="c1"># Attach the logViewer widget to the window</span>
<span class="n">ttk</span><span class="o">.</span><span class="n">TTkLogViewer</span><span class="p">(</span><span class="n">parent</span><span class="o">=</span><span class="n">logWin</span><span class="p">)</span>
<span class="c1"># Push some Debug messages</span>
<span class="n">ttk</span><span class="o">.</span><span class="n">TTkLog</span><span class="o">.</span><span class="n">info</span><span class="p">(</span> <span class="s2">&quot;Test Info Message&quot;</span><span class="p">)</span>
<span class="n">ttk</span><span class="o">.</span><span class="n">TTkLog</span><span class="o">.</span><span class="n">debug</span><span class="p">(</span> <span class="s2">&quot;Test Debug Message&quot;</span><span class="p">)</span>
<span class="n">ttk</span><span class="o">.</span><span class="n">TTkLog</span><span class="o">.</span><span class="n">error</span><span class="p">(</span> <span class="s2">&quot;Test Error Message&quot;</span><span class="p">)</span>
<span class="n">ttk</span><span class="o">.</span><span class="n">TTkLog</span><span class="o">.</span><span class="n">warn</span><span class="p">(</span> <span class="s2">&quot;Test Warning Message&quot;</span><span class="p">)</span>
<span class="n">ttk</span><span class="o">.</span><span class="n">TTkLog</span><span class="o">.</span><span class="n">critical</span><span class="p">(</span><span class="s2">&quot;Test Critical Message&quot;</span><span class="p">)</span>
<span class="n">ttk</span><span class="o">.</span><span class="n">TTkLog</span><span class="o">.</span><span class="n">fatal</span><span class="p">(</span> <span class="s2">&quot;Test Fatal Message&quot;</span><span class="p">)</span>
<span class="c1"># Start the Main loop</span>
<span class="n">root</span><span class="o">.</span><span class="n">mainloop</span><span class="p">()</span>
</pre></div>
</div>
<p>The above code produces the following output</p>
<div class="highlight-default notranslate"><div class="highlight"><pre><span></span>╔══════════════════════════════════════════════════════════════════════════════╗
║ LogViewer Window ║
╟──────────────────────────────────────────────────────────────────────────────╢
║ ║
║INFO : tutorial/logging/example4.ttklogviewer.py:36 Test Info Message ║
║DEBUG: tutorial/logging/example4.ttklogviewer.py:37 Test Debug Message ║
║ERROR: tutorial/logging/example4.ttklogviewer.py:38 Test Error Message ║
║WARNING : tutorial/logging/example4.ttklogviewer.py:39 Test Warning Message ║
║CRITICAL: tutorial/logging/example4.ttklogviewer.py:40 Test Critical Message ║
║FATAL: tutorial/logging/example4.ttklogviewer.py:41 Test Fatal Message ║
║DEBUG: _/.venv/lib/python3.8/site-packages/TermTk/TTkCore/ttk.py:70 Starting M║
║DEBUG: _/.venv/lib/python3.8/site-packages/TermTk/TTkCore/ttk.py:80 Signal Eve║
║DEBUG: _/.venv/lib/python3.8/site-packages/TermTk/TTkCore/ttk.py:65 fps: 33 ║
║DEBUG: _/.venv/lib/python3.8/site-packages/TermTk/TTkCore/ttk.py:65 fps: 34 ║
║DEBUG: _/.venv/lib/python3.8/site-packages/TermTk/TTkCore/ttk.py:65 fps: 34 ║
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