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python-cheatsheet
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Format, Inline, Audio

pull/135/head
Jure Šorn 2 years ago
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c15942fc77
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1f03065431
3 changed files with 19 additions and 19 deletions
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  1. 16
      README.md
  2. 20
      index.html
  3. 2
      pdf/remove_links.py

16
README.md
View File

@ -392,14 +392,14 @@ import re
Format
------
```python
<str> = f'{<el_1>}, {<el_2>}' # Or: '{}, {}'.format(<el_1>, <el_2>)
<str> = f'{<el_1>}, {<el_2>}' # Curly brackets can also contain expressions.
<str> = '{}, {}'.format(<el_1>, <el_2>) # Or: '{0}, {a}'.format(<el_1>, a=<el_2>)
<str> = '%s, %s' % (<el_1>, <el_2>) # Redundant and inferior C style formatting.
```
### Attributes
```python
>>> from collections import namedtuple
>>> Person = namedtuple('Person', 'name height')
>>> Person = collections.namedtuple('Person', 'name height')
>>> person = Person('Jean-Luc', 187)
>>> f'{person.height}'
'187'
@ -785,7 +785,7 @@ Inline
### Conditional Expression
```python
<obj> = <exp_if_true> if <condition> else <exp_if_false>
<obj> = <exp_if_true> if <condition> else <exp_if_false> # Only one expression gets evaluated.
```
```python
@ -1814,7 +1814,7 @@ import csv
<list> = list(<reader>) # Returns a list of remaining rows.
```
* **File must be opened with a `'newline=""'` argument, or newlines embedded inside quoted fields will not be interpreted correctly!**
* **To print the table to the console use [Tabulate](#table) library.**
* **To print the spreadsheet to the console use [Tabulate](#table) library.**
* **For XML and binary Excel files (xlsx, xlsm and xlsb) use [Pandas](#dataframe-plot-encode-decode) library.**
### Write
@ -2920,9 +2920,9 @@ with wave.open('test.wav', 'rb') as file:
```python
# $ pip3 install pyttsx3
import pyttsx3
engine = pyttsx3.init()
engine.say('Sally sells seashells by the seashore.')
engine.runAndWait()
<Engine> = pyttsx3.init() # Returns a new Engine.
<Engine>.say(<str>) # Stages the string to be read.
<Engine>.runAndWait() # Reads all staged strings while blocking.
```

20
index.html
View File

@ -54,7 +54,7 @@
<body>
<header>
<aside>June 21, 2022</aside>
<aside>June 22, 2022</aside>
<a href="https://gto76.github.io" rel="author">Jure Šorn</a>
</header>
@ -365,12 +365,12 @@ to_exclusive = &lt;range&gt;.stop
<li><strong>As shown above, it restricts all special sequence matches to the first 128 characters and prevents <code class="python hljs"><span class="hljs-string">'\s'</span></code> from accepting <code class="python hljs"><span class="hljs-string">'[\x1c-\x1f]'</span></code> (the so-called separator characters).</strong></li>
<li><strong>Use a capital letter for negation (all non-ASCII characters will be matched when used in combination with ASCII flag).</strong></li>
</ul>
<div><h2 id="format"><a href="#format" name="format">#</a>Format</h2><pre><code class="python language-python hljs">&lt;str&gt; = <span class="hljs-string">f'<span class="hljs-subst">{&lt;el_1&gt;}</span>, <span class="hljs-subst">{&lt;el_2&gt;}</span>'</span> <span class="hljs-comment"># Or: '{}, {}'.format(&lt;el_1&gt;, &lt;el_2&gt;)</span>
<div><h2 id="format"><a href="#format" name="format">#</a>Format</h2><pre><code class="python language-python hljs">&lt;str&gt; = <span class="hljs-string">f'<span class="hljs-subst">{&lt;el_1&gt;}</span>, <span class="hljs-subst">{&lt;el_2&gt;}</span>'</span> <span class="hljs-comment"># Curly brackets can also contain expressions.</span>
&lt;str&gt; = <span class="hljs-string">'{}, {}'</span>.format(&lt;el_1&gt;, &lt;el_2&gt;) <span class="hljs-comment"># Or: '{0}, {a}'.format(&lt;el_1&gt;, a=&lt;el_2&gt;)</span>
&lt;str&gt; = <span class="hljs-string">'%s, %s'</span> % (&lt;el_1&gt;, &lt;el_2&gt;) <span class="hljs-comment"># Redundant and inferior C style formatting.</span>
</code></pre></div>
<div><h3 id="attributes">Attributes</h3><pre><code class="python language-python hljs"><span class="hljs-meta">&gt;&gt;&gt; </span><span class="hljs-keyword">from</span> collections <span class="hljs-keyword">import</span> namedtuple
<span class="hljs-meta">&gt;&gt;&gt; </span>Person = namedtuple(<span class="hljs-string">'Person'</span>, <span class="hljs-string">'name height'</span>)
<div><h3 id="attributes">Attributes</h3><pre><code class="python language-python hljs"><span class="hljs-meta">&gt;&gt;&gt; </span>Person = collections.namedtuple(<span class="hljs-string">'Person'</span>, <span class="hljs-string">'name height'</span>)
<span class="hljs-meta">&gt;&gt;&gt; </span>person = Person(<span class="hljs-string">'Jean-Luc'</span>, <span class="hljs-number">187</span>)
<span class="hljs-meta">&gt;&gt;&gt; </span><span class="hljs-string">f'<span class="hljs-subst">{person.height}</span>'</span>
<span class="hljs-string">'187'</span>
@ -673,7 +673,7 @@ func(*args, **kwargs)
&lt;bool&gt; = all(&lt;collection&gt;) <span class="hljs-comment"># Is True for all elements or empty.</span>
</code></pre></div>
<div><h3 id="conditionalexpression">Conditional Expression</h3><pre><code class="python language-python hljs">&lt;obj&gt; = &lt;exp_if_true&gt; <span class="hljs-keyword">if</span> &lt;condition&gt; <span class="hljs-keyword">else</span> &lt;exp_if_false&gt;
<div><h3 id="conditionalexpression">Conditional Expression</h3><pre><code class="python language-python hljs">&lt;obj&gt; = &lt;exp_if_true&gt; <span class="hljs-keyword">if</span> &lt;condition&gt; <span class="hljs-keyword">else</span> &lt;exp_if_false&gt; <span class="hljs-comment"># Only one expression gets evaluated.</span>
</code></pre></div>
<pre><code class="python language-python hljs"><span class="hljs-meta">&gt;&gt;&gt; </span>[a <span class="hljs-keyword">if</span> a <span class="hljs-keyword">else</span> <span class="hljs-string">'zero'</span> <span class="hljs-keyword">for</span> a <span class="hljs-keyword">in</span> (<span class="hljs-number">0</span>, <span class="hljs-number">1</span>, <span class="hljs-number">2</span>, <span class="hljs-number">3</span>)]
@ -1513,7 +1513,7 @@ CompletedProcess(args=[<span class="hljs-string">'bc'</span>, <span class="hljs-
<ul>
<li><strong>File must be opened with a <code class="python hljs"><span class="hljs-string">'newline=""'</span></code> argument, or newlines embedded inside quoted fields will not be interpreted correctly!</strong></li>
<li><strong>To print the table to the console use <a href="#table">Tabulate</a> library.</strong></li>
<li><strong>To print the spreadsheet to the console use <a href="#table">Tabulate</a> library.</strong></li>
<li><strong>For XML and binary Excel files (xlsx, xlsm and xlsb) use <a href="#dataframeplotencodedecode">Pandas</a> library.</strong></li>
</ul>
<div><h3 id="write">Write</h3><pre><code class="python language-python hljs">&lt;writer&gt; = csv.writer(&lt;file&gt;) <span class="hljs-comment"># Also: `dialect='excel', delimiter=','`.</span>
@ -2379,9 +2379,9 @@ write_to_wav_file(<span class="hljs-string">'test.wav'</span>, samples_f)
<div><h3 id="texttospeech">Text to Speech</h3><pre><code class="python language-python hljs"><span class="hljs-comment"># $ pip3 install pyttsx3</span>
<span class="hljs-keyword">import</span> pyttsx3
engine = pyttsx3.init()
engine.say(<span class="hljs-string">'Sally sells seashells by the seashore.'</span>)
engine.runAndWait()
&lt;Engine&gt; = pyttsx3.init() <span class="hljs-comment"># Returns a new Engine.</span>
&lt;Engine&gt;.say(&lt;str&gt;) <span class="hljs-comment"># Stages the string to be read.</span>
&lt;Engine&gt;.runAndWait() <span class="hljs-comment"># Reads all staged strings while blocking.</span>
</code></pre></div>
<div><h2 id="synthesizer"><a href="#synthesizer" name="synthesizer">#</a>Synthesizer</h2><div><h4 id="playspopcornbygershonkingsley">Plays Popcorn by Gershon Kingsley:</h4><pre><code class="python language-python hljs"><span class="hljs-comment"># $ pip3 install simpleaudio</span>
@ -2901,7 +2901,7 @@ $ pyinstaller script.py --add-data '&lt;path&gt;:.' <span class="hljs-comment">
<footer>
<aside>June 21, 2022</aside>
<aside>June 22, 2022</aside>
<a href="https://gto76.github.io" rel="author">Jure Šorn</a>
</footer>

2
pdf/remove_links.py
View File

@ -17,7 +17,7 @@ MATCHES = {
'<strong>Generators returned by the <a href="#generator">generator functions</a> and <a href="#comprehensions">generator expressions</a>.</strong>': '<strong>Generators returned by the generator functions (p. 4) and generator expressions (p. 11).</strong>',
'<strong>File objects returned by the <a href="#open">open()</a> function, etc.</strong>': '<strong>File objects returned by the open() function (p. 22), etc.</strong>',
'<strong>Functions report OS related errors by raising either OSError or one of its <a href="#exceptions-1">subclasses</a>.</strong>': '<strong>Functions report OS related errors by raising OSError or one of its subclasses (p. 23).</strong>',
'<strong>To print the table to the console use <a href="#table">Tabulate</a> library.</strong>': '<strong>To print the table to the console use Tabulate library (p. 34).</strong>',
'<strong>To print the spreadsheet to the console use <a href="#table">Tabulate</a> library.</strong>': '<strong>To print the spreadsheet to the console use Tabulate library (p. 34).</strong>',
'<strong>For XML and binary Excel files (xlsx, xlsm and xlsb) use <a href="#dataframeplotencodedecode">Pandas</a> library.</strong>': '<strong>For XML and binary Excel files (xlsx, xlsm and xlsb) use Pandas library (p. 46).</strong>',
'<strong>Bools will be stored and returned as ints and dates as <a href="#encode">ISO formatted strings</a>.</strong>': '<strong>Bools will be stored and returned as ints and dates as ISO formatted strings (p. 9).</strong>',
'<strong>An object with the same interface called ProcessPoolExecutor provides true parallelism by running a separate interpreter in each process. All arguments must be <a href="#pickle">pickable</a>.</strong>': '<strong>An object with the same interface called ProcessPoolExecutor provides true parallelism by running a separate interpreter in each process. All arguments must be pickable (p. 25).</strong>',

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