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python-cheatsheet
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Logging, Pygame, Pandas

pull/109/merge
Jure Šorn 1 year ago
parent
ac835f5958
commit
37286e6e85
3 changed files with 13 additions and 13 deletions
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  1. 10
      README.md
  2. 14
      index.html
  3. 2
      parse.js

10
README.md
View File

@ -1712,7 +1712,7 @@ import os, shutil, subprocess
```python
os.chdir(<path>) # Changes the current working directory.
os.mkdir(<path>, mode=0o777) # Creates a directory. Permissions are in octal.
os.makedirs(<path>, mode=0o777) # Creates all path's dirs. Also: `exist_ok=False`.
os.makedirs(<path>, mode=0o777) # Creates all path's dirs. Also `exist_ok=False`.
```
```python
@ -2499,7 +2499,7 @@ logging.basicConfig(
>>> logger.addHandler(handler)
>>> logger.critical('Running out of disk space.')
CRITICAL:my_module:Running out of disk space.
>>> open('test.log').read()
>>> print(open('test.log').read())
2023-02-07 23:21:01,430 CRITICAL:my_module:Running out of disk space.
```
@ -3020,13 +3020,13 @@ while not pg.event.get(pg.QUIT):
<Surf> = pg.display.set_mode((width, height)) # Opens new window and returns its surface.
<Surf> = pg.Surface((width, height)) # New RGB surface. RGBA if `flags=pg.SRCALPHA`.
<Surf> = pg.image.load(<path/file>) # Loads the image. Format depends on source.
<Surf> = pg.surfarray.make_surface(<np_array>) # Also `<array> = surfarray.pixels3d(<Surf>)`.
<Surf> = pg.surfarray.make_surface(<np_array>) # Also `<np_arr> = surfarray.pixels3d(<Surf>)`.
<Surf> = <Surf>.subsurface(<Rect>) # Returns a subsurface.
```
```python
<Surf>.fill(color) # Tuple, Color('#rrggbb[aa]') or Color(<name>).
<Surf>.set_at((x, y), color) # Updates pixel.
<Surf>.set_at((x, y), color) # Updates pixel. Also <Surf>.get_at((x, y)).
<Surf>.blit(<Surf>, (x, y)) # Draws passed surface to the surface.
```
@ -3357,7 +3357,7 @@ plt.show() # Displays the plot. Also plt.sav
```python
<dict> = <DF>.to_dict(['d/l/s/…']) # Returns columns as dicts, lists or series.
<str> = <DF>.to_json/html/csv([<path>]) # Also to_markdown/latex([<path>]).
<DF>.to_pickle/excel(<path>) # Run `$ pip3 install openpyxl` for xlsx files.
<DF>.to_pickle/excel(<path>) # Run `$ pip3 install "pandas[excel]" odfpy`.
<DF>.to_sql('<table_name>', <connection>) # Accepts SQLite3 or SQLAlchemy connection.
```

14
index.html
View File

@ -54,7 +54,7 @@
<body>
<header>
<aside>April 9, 2023</aside>
<aside>April 11, 2023</aside>
<a href="https://gto76.github.io" rel="author">Jure Šorn</a>
</header>
@ -1439,7 +1439,7 @@ value = args.&lt;name&gt;
<pre><code class="python language-python hljs">os.chdir(&lt;path&gt;) <span class="hljs-comment"># Changes the current working directory.</span>
os.mkdir(&lt;path&gt;, mode=<span class="hljs-number">0o777</span>) <span class="hljs-comment"># Creates a directory. Permissions are in octal.</span>
os.makedirs(&lt;path&gt;, mode=<span class="hljs-number">0o777</span>) <span class="hljs-comment"># Creates all path's dirs. Also: `exist_ok=False`.</span>
os.makedirs(&lt;path&gt;, mode=<span class="hljs-number">0o777</span>) <span class="hljs-comment"># Creates all path's dirs. Also `exist_ok=False`.</span>
</code></pre>
<pre><code class="python language-python hljs">shutil.copy(from, to) <span class="hljs-comment"># Copies the file. 'to' can exist or be a dir.</span>
shutil.copytree(from, to) <span class="hljs-comment"># Copies the directory. 'to' must not exist.</span>
@ -2048,7 +2048,7 @@ logging.debug/info/warning/error/critical(&lt;str&gt;) <span class="hljs-commen
<span class="hljs-meta">&gt;&gt;&gt; </span>logger.addHandler(handler)
<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.
<span class="hljs-meta">&gt;&gt;&gt; </span>open(<span class="hljs-string">'test.log'</span>).read()
<span class="hljs-meta">&gt;&gt;&gt; </span>print(open(<span class="hljs-string">'test.log'</span>).read())
2023-02-07 23:21:01,430 CRITICAL:my_module:Running out of disk space.
</code></pre></div>
@ -2463,13 +2463,13 @@ rect = pg.Rect(<span class="hljs-number">240</span>, <span class="hljs-number">2
<div><h3 id="surface">Surface</h3><p><strong>Object for representing images.</strong></p><pre><code class="python language-python hljs">&lt;Surf&gt; = pg.display.set_mode((width, height)) <span class="hljs-comment"># Opens new window and returns its surface.</span>
&lt;Surf&gt; = pg.Surface((width, height)) <span class="hljs-comment"># New RGB surface. RGBA if `flags=pg.SRCALPHA`.</span>
&lt;Surf&gt; = pg.image.load(&lt;path/file&gt;) <span class="hljs-comment"># Loads the image. Format depends on source.</span>
&lt;Surf&gt; = pg.surfarray.make_surface(&lt;np_array&gt;) <span class="hljs-comment"># Also `&lt;array&gt; = surfarray.pixels3d(&lt;Surf&gt;)`.</span>
&lt;Surf&gt; = pg.surfarray.make_surface(&lt;np_array&gt;) <span class="hljs-comment"># Also `&lt;np_arr&gt; = surfarray.pixels3d(&lt;Surf&gt;)`.</span>
&lt;Surf&gt; = &lt;Surf&gt;.subsurface(&lt;Rect&gt;) <span class="hljs-comment"># Returns a subsurface.</span>
</code></pre></div>
<pre><code class="python language-python hljs">&lt;Surf&gt;.fill(color) <span class="hljs-comment"># Tuple, Color('#rrggbb[aa]') or Color(&lt;name&gt;).</span>
&lt;Surf&gt;.set_at((x, y), color) <span class="hljs-comment"># Updates pixel.</span>
&lt;Surf&gt;.set_at((x, y), color) <span class="hljs-comment"># Updates pixel. Also &lt;Surf&gt;.get_at((x, y)).</span>
&lt;Surf&gt;.blit(&lt;Surf&gt;, (x, y)) <span class="hljs-comment"># Draws passed surface to the surface.</span>
</code></pre>
<pre><code class="python language-python hljs"><span class="hljs-keyword">from</span> pygame.transform <span class="hljs-keyword">import</span> scale, ...
@ -2740,7 +2740,7 @@ plt.show() <span class="hljs-comment"># Disp
</code></pre>
<pre><code class="python language-python hljs">&lt;dict&gt; = &lt;DF&gt;.to_dict([<span class="hljs-string">'d/l/s/…'</span>]) <span class="hljs-comment"># Returns columns as dicts, lists or series.</span>
&lt;str&gt; = &lt;DF&gt;.to_json/html/csv([&lt;path&gt;]) <span class="hljs-comment"># Also to_markdown/latex([&lt;path&gt;]).</span>
&lt;DF&gt;.to_pickle/excel(&lt;path&gt;) <span class="hljs-comment"># Run `$ pip3 install openpyxl` for xlsx files.</span>
&lt;DF&gt;.to_pickle/excel(&lt;path&gt;) <span class="hljs-comment"># Run `$ pip3 install "pandas[excel]" odfpy`.</span>
&lt;DF&gt;.to_sql(<span class="hljs-string">'&lt;table_name&gt;'</span>, &lt;connection&gt;) <span class="hljs-comment"># Accepts SQLite3 or SQLAlchemy connection.</span>
</code></pre>
<div><h3 id="groupby">GroupBy</h3><p><strong>Object that groups together rows of a dataframe based on the value of the passed column.</strong></p><pre><code class="python language-python hljs"><span class="hljs-meta">&gt;&gt;&gt; </span>df = pd.DataFrame([[<span class="hljs-number">1</span>, <span class="hljs-number">2</span>, <span class="hljs-number">3</span>], [<span class="hljs-number">4</span>, <span class="hljs-number">5</span>, <span class="hljs-number">6</span>], [<span class="hljs-number">7</span>, <span class="hljs-number">8</span>, <span class="hljs-number">6</span>]], list(<span class="hljs-string">'abc'</span>), list(<span class="hljs-string">'xyz'</span>))
@ -2934,7 +2934,7 @@ $ pyinstaller script.py --add-data '&lt;path&gt;:.' <span class="hljs-comment">
<footer>
<aside>April 9, 2023</aside>
<aside>April 11, 2023</aside>
<a href="https://gto76.github.io" rel="author">Jure Šorn</a>
</footer>

2
parse.js
View File

@ -203,7 +203,7 @@ const LOGGING_EXAMPLE =
'<span class="hljs-meta">&gt;&gt;&gt; </span>logger.addHandler(handler)\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' +
'<span class="hljs-meta">&gt;&gt;&gt; </span>open(<span class="hljs-string">\'test.log\'</span>).read()\n' +
'<span class="hljs-meta">&gt;&gt;&gt; </span>print(open(<span class="hljs-string">\'test.log\'</span>).read())\n' +
'2023-02-07 23:21:01,430 CRITICAL:my_module:Running out of disk space.\n';
const AUDIO =

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