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python-cheatsheet
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Logging

pull/178/head
Jure Šorn 1 year ago
parent
a14c1de8d6
commit
cc53f911a7
3 changed files with 18 additions and 16 deletions
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  1. 11
      README.md
  2. 15
      index.html
  3. 8
      parse.js

11
README.md
View File

@ -2256,7 +2256,8 @@ logging.basicConfig(
<Handler>.setFormatter(<Formatter>) # Adds Formatter to the Handler.
<Handler>.setLevel(<int/str>) # Processes all messages by default.
<Logger>.addHandler(<Handler>) # Adds Handler to the Logger.
<Logger>.setLevel(<int/str>) # What is sent to its/ancestor's handlers.
<Logger>.setLevel(<int/str>) # What is sent to its/ancestors' handlers.
<Logger>.propagate = <bool> # Cuts off ancestors' handlers if false.
```
* **Parent logger can be specified by naming the child logger `'<parent>.<name>'`.**
* **If logger doesn't have a set level it inherits it from the first ancestor that does.**
@ -2267,10 +2268,10 @@ logging.basicConfig(
```python
>>> logger = logging.getLogger('my_module')
>>> handler = logging.FileHandler('test.log', encoding='utf-8')
>>> formatter = logging.Formatter('%(asctime)s %(levelname)s:%(name)s:%(message)s')
>>> handler.setFormatter(formatter)
>>> handler.setFormatter(logging.Formatter('%(asctime)s %(levelname)s:%(name)s:%(message)s'))
>>> logger.addHandler(handler)
>>> logging.basicConfig(level='DEBUG')
>>> logger.setLevel('DEBUG')
>>> logging.basicConfig()
>>> logging.root.handlers[0].setLevel('WARNING')
>>> logger.critical('Running out of disk space.')
CRITICAL:my_module:Running out of disk space.
@ -2291,7 +2292,7 @@ Introspection
<list> = dir(<object>) # Names of object's attributes (including methods).
<dict> = vars(<object>) # Dict of writable attributes. Also <obj>.__dict__.
<bool> = hasattr(<object>, '<attr_name>') # Checks if getattr() raises an AttributeError.
value = getattr(<object>, '<attr_name>') # Raises AttributeError if attribute is missing.
value = getattr(<object>, '<attr_name>') # Default value can be passed as the third argument.
setattr(<object>, '<attr_name>', value) # Only works on objects with '__dict__' attribute.
delattr(<object>, '<attr_name>') # Same. Also `del <object>.<attr_name>`.
```

15
index.html
View File

@ -54,7 +54,7 @@
<body>
<header>
<aside>February 24, 2024</aside>
<aside>February 28, 2024</aside>
<a href="https://gto76.github.io" rel="author">Jure Šorn</a>
</header>
@ -1862,7 +1862,8 @@ logging.debug/info/warning/error/critical(&lt;str&gt;) <span class="hljs-com
&lt;Handler&gt;.setFormatter(&lt;Formatter&gt;) <span class="hljs-comment"># Adds Formatter to the Handler.</span>
&lt;Handler&gt;.setLevel(&lt;int/str&gt;) <span class="hljs-comment"># Processes all messages by default.</span>
&lt;Logger&gt;.addHandler(&lt;Handler&gt;) <span class="hljs-comment"># Adds Handler to the Logger.</span>
&lt;Logger&gt;.setLevel(&lt;int/str&gt;) <span class="hljs-comment"># What is sent to its/ancestor's handlers.</span>
&lt;Logger&gt;.setLevel(&lt;int/str&gt;) <span class="hljs-comment"># What is sent to its/ancestors' handlers.</span>
&lt;Logger&gt;.propagate = &lt;bool&gt; <span class="hljs-comment"># Cuts off ancestors' handlers if false.</span>
</code></pre>
<ul>
<li><strong>Parent logger can be specified by naming the child logger <code class="python hljs"><span class="hljs-string">'&lt;parent&gt;.&lt;name&gt;'</span></code>.</strong></li>
@ -1872,10 +1873,10 @@ logging.debug/info/warning/error/critical(&lt;str&gt;) <span class="hljs-com
</ul>
<div><h4 id="createsaloggerthatwritesallmessagestofileandsendsthemtotherootshandlerthatprintswarningsorhigher">Creates a logger that writes all messages to file and sends them to the root's handler that prints warnings or higher:</h4><pre><code class="python language-python hljs"><span class="hljs-meta">&gt;&gt;&gt; </span>logger = logging.getLogger(<span class="hljs-string">'my_module'</span>)
<span class="hljs-meta">&gt;&gt;&gt; </span>handler = logging.FileHandler(<span class="hljs-string">'test.log'</span>, encoding=<span class="hljs-string">'utf-8'</span>)
<span class="hljs-meta">&gt;&gt;&gt; </span>formatter = logging.Formatter(<span class="hljs-string">'%(asctime)s %(levelname)s:%(name)s:%(message)s'</span>)
<span class="hljs-meta">&gt;&gt;&gt; </span>handler.setFormatter(formatter)
<span class="hljs-meta">&gt;&gt;&gt; </span>handler.setFormatter(logging.Formatter(<span class="hljs-string">'%(asctime)s %(levelname)s:%(name)s:%(message)s'</span>))
<span class="hljs-meta">&gt;&gt;&gt; </span>logger.addHandler(handler)
<span class="hljs-meta">&gt;&gt;&gt; </span>logging.basicConfig(level=<span class="hljs-string">'DEBUG'</span>)
<span class="hljs-meta">&gt;&gt;&gt; </span>logger.setLevel(<span class="hljs-string">'DEBUG'</span>)
<span class="hljs-meta">&gt;&gt;&gt; </span>logging.basicConfig()
<span class="hljs-meta">&gt;&gt;&gt; </span>logging.root.handlers[<span class="hljs-number">0</span>].setLevel(<span class="hljs-string">'WARNING'</span>)
<span class="hljs-meta">&gt;&gt;&gt; </span>logger.critical(<span class="hljs-string">'Running out of disk space.'</span>)
CRITICAL:my_module:Running out of disk space.
@ -1891,7 +1892,7 @@ CRITICAL:my_module:Running out of disk space.
<pre><code class="python language-python hljs">&lt;list&gt; = dir(&lt;object&gt;) <span class="hljs-comment"># Names of object's attributes (including methods).</span>
&lt;dict&gt; = vars(&lt;object&gt;) <span class="hljs-comment"># Dict of writable attributes. Also &lt;obj&gt;.__dict__.</span>
&lt;bool&gt; = hasattr(&lt;object&gt;, <span class="hljs-string">'&lt;attr_name&gt;'</span>) <span class="hljs-comment"># Checks if getattr() raises an AttributeError.</span>
value = getattr(&lt;object&gt;, <span class="hljs-string">'&lt;attr_name&gt;'</span>) <span class="hljs-comment"># Raises AttributeError if attribute is missing.</span>
value = getattr(&lt;object&gt;, <span class="hljs-string">'&lt;attr_name&gt;'</span>) <span class="hljs-comment"># Default value can be passed as the third argument.</span>
setattr(&lt;object&gt;, <span class="hljs-string">'&lt;attr_name&gt;'</span>, value) <span class="hljs-comment"># Only works on objects with '__dict__' attribute.</span>
delattr(&lt;object&gt;, <span class="hljs-string">'&lt;attr_name&gt;'</span>) <span class="hljs-comment"># Same. Also `del &lt;object&gt;.&lt;attr_name&gt;`.</span>
</code></pre>
@ -2936,7 +2937,7 @@ $ deactivate <span class="hljs-comment"># Deactivates the activ
<footer>
<aside>February 24, 2024</aside>
<aside>February 28, 2024</aside>
<a href="https://gto76.github.io" rel="author">Jure Šorn</a>
</footer>

8
parse.js
View File

@ -218,10 +218,10 @@ const PROGRESS_BAR =
const LOGGING_EXAMPLE =
'<span class="hljs-meta">&gt;&gt;&gt; </span>logger = logging.getLogger(<span class="hljs-string">\'my_module\'</span>)\n' +
'<span class="hljs-meta">&gt;&gt;&gt; </span>handler = logging.FileHandler(<span class="hljs-string">\'test.log\'</span>, encoding=<span class="hljs-string">\'utf-8\'</span>)\n' +
'<span class="hljs-meta">&gt;&gt;&gt; </span>formatter = logging.Formatter(<span class="hljs-string">\'%(asctime)s %(levelname)s:%(name)s:%(message)s\'</span>)\n' +
'<span class="hljs-meta">&gt;&gt;&gt; </span>handler.setFormatter(formatter)\n' +
'<span class="hljs-meta">&gt;&gt;&gt; </span>handler.setFormatter(logging.Formatter(<span class="hljs-string">\'%(asctime)s %(levelname)s:%(name)s:%(message)s\'</span>))\n' +
'<span class="hljs-meta">&gt;&gt;&gt; </span>logger.addHandler(handler)\n' +
'<span class="hljs-meta">&gt;&gt;&gt; </span>logging.basicConfig(level=<span class="hljs-string">\'DEBUG\'</span>)\n' +
'<span class="hljs-meta">&gt;&gt;&gt; </span>logger.setLevel(<span class="hljs-string">\'DEBUG\'</span>)\n' +
'<span class="hljs-meta">&gt;&gt;&gt; </span>logging.basicConfig()\n' +
'<span class="hljs-meta">&gt;&gt;&gt; </span>logging.root.handlers[<span class="hljs-number">0</span>].setLevel(<span class="hljs-string">\'WARNING\'</span>)\n' +
'<span class="hljs-meta">&gt;&gt;&gt; </span>logger.critical(<span class="hljs-string">\'Running out of disk space.\'</span>)\n' +
'CRITICAL:my_module:Running out of disk space.\n' +
@ -832,7 +832,7 @@ function fixHighlights() {
//$(`code:contains(import asyncio, collections, curses, curses.textpad, enum, random)`).html(COROUTINES);
$(`code:contains(import curses, os)`).html(CURSES);
$(`code:contains(pip3 install tqdm)`).html(PROGRESS_BAR);
$(`code:contains(>>> logging.basicConfig(level=)`).html(LOGGING_EXAMPLE);
$(`code:contains(>>> logging.basicConfig()`).html(LOGGING_EXAMPLE);
$(`code:contains(samples_f = (sin(i *)`).html(AUDIO);
$(`code:contains(collections, dataclasses, enum, io, itertools)`).html(MARIO);
$(`code:contains(>>> gb = df.groupby)`).html(PLOTLY);

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