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python-cheatsheet
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CSV, Synthesizer

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Jure Šorn 1 year ago
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2 changed files with 8 additions and 8 deletions
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  1. 8
      README.md
  2. 8
      index.html

8
README.md
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@ -1829,7 +1829,7 @@ import csv
* **File must be opened with a `'newline=""'` argument, or '\r' will be added in front of every '\n' on platforms that use '\r\n' line endings!** * **File must be opened with a `'newline=""'` argument, or '\r' will be added in front of every '\n' on platforms that use '\r\n' line endings!**
### Parameters ### Parameters
* **`'dialect'` - Master parameter that sets the default values. String or a Dialect object.**
* **`'dialect'` - Master parameter that sets the default values. String or a 'csv.Dialect' object.**
* **`'delimiter'` - A one-character string used to separate fields.** * **`'delimiter'` - A one-character string used to separate fields.**
* **`'quotechar'` - Character for quoting fields that contain special characters.** * **`'quotechar'` - Character for quoting fields that contain special characters.**
* **`'doublequote'` - Whether quotechars inside fields are/get doubled or escaped.** * **`'doublequote'` - Whether quotechars inside fields are/get doubled or escaped.**
@ -2943,7 +2943,7 @@ Synthesizer
#### Plays Popcorn by Gershon Kingsley: #### Plays Popcorn by Gershon Kingsley:
```python ```python
# $ pip3 install simpleaudio # $ pip3 install simpleaudio
import itertools as it, math, struct, simpleaudio
import array, itertools as it, math, simpleaudio
F = 44100 F = 44100
P1 = '71♩,69♪,,71♩,66♪,,62♩,66♪,,59♩,,' P1 = '71♩,69♪,,71♩,66♪,,62♩,66♪,,59♩,,'
@ -2955,8 +2955,8 @@ get_hz = lambda key: 8.176 * 2 ** (int(key) / 12)
parse_note = lambda note: (get_hz(note[:2]), 1/4 if '♩' in note else 1/8) parse_note = lambda note: (get_hz(note[:2]), 1/4 if '♩' in note else 1/8)
get_samples = lambda note: get_wave(*parse_note(note)) if note else get_pause(1/8) get_samples = lambda note: get_wave(*parse_note(note)) if note else get_pause(1/8)
samples_f = it.chain.from_iterable(get_samples(n) for n in f'{P1},{P1},{P2}'.split(',')) samples_f = it.chain.from_iterable(get_samples(n) for n in f'{P1},{P1},{P2}'.split(','))
samples_b = b''.join(struct.pack('<h', int(f * 30000)) for f in samples_f)
simpleaudio.play_buffer(samples_b, 1, 2, F)
samples_i = array.array('h', (int(f * 30000) for f in samples_f))
simpleaudio.play_buffer(samples_i, 1, 2, F)
``` ```

8
index.html
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@ -1526,7 +1526,7 @@ CompletedProcess(args=[<span class="hljs-string">'bc'</span>, <span class="hljs-
<li><strong>File must be opened with a <code class="python hljs"><span class="hljs-string">'newline=""'</span></code> argument, or '\r' will be added in front of every '\n' on platforms that use '\r\n' line endings!</strong></li> <li><strong>File must be opened with a <code class="python hljs"><span class="hljs-string">'newline=""'</span></code> argument, or '\r' will be added in front of every '\n' on platforms that use '\r\n' line endings!</strong></li>
</ul> </ul>
<div><h3 id="parameters">Parameters</h3><ul> <div><h3 id="parameters">Parameters</h3><ul>
<li><strong><code class="python hljs"><span class="hljs-string">'dialect'</span></code> - Master parameter that sets the default values. String or a Dialect object.</strong></li>
<li><strong><code class="python hljs"><span class="hljs-string">'dialect'</span></code> - Master parameter that sets the default values. String or a 'csv.Dialect' object.</strong></li>
<li><strong><code class="python hljs"><span class="hljs-string">'delimiter'</span></code> - A one-character string used to separate fields.</strong></li> <li><strong><code class="python hljs"><span class="hljs-string">'delimiter'</span></code> - A one-character string used to separate fields.</strong></li>
<li><strong><code class="python hljs"><span class="hljs-string">'quotechar'</span></code> - Character for quoting fields that contain special characters.</strong></li> <li><strong><code class="python hljs"><span class="hljs-string">'quotechar'</span></code> - Character for quoting fields that contain special characters.</strong></li>
<li><strong><code class="python hljs"><span class="hljs-string">'doublequote'</span></code> - Whether quotechars inside fields are/get doubled or escaped.</strong></li> <li><strong><code class="python hljs"><span class="hljs-string">'doublequote'</span></code> - Whether quotechars inside fields are/get doubled or escaped.</strong></li>
@ -2401,7 +2401,7 @@ engine.runAndWait()
</code></pre></div> </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> <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>
<span class="hljs-keyword">import</span> itertools <span class="hljs-keyword">as</span> it, math, struct, simpleaudio
<span class="hljs-keyword">import</span> array, itertools <span class="hljs-keyword">as</span> it, math, simpleaudio
F = <span class="hljs-number">44100</span> F = <span class="hljs-number">44100</span>
P1 = <span class="hljs-string">'71♩,69♪,,71♩,66♪,,62♩,66♪,,59♩,,'</span> P1 = <span class="hljs-string">'71♩,69♪,,71♩,66♪,,62♩,66♪,,59♩,,'</span>
@ -2413,8 +2413,8 @@ get_hz = <span class="hljs-keyword">lambda</span> key: <span class="hljs-nu
parse_note = <span class="hljs-keyword">lambda</span> note: (get_hz(note[:<span class="hljs-number">2</span>]), <span class="hljs-number">1</span>/<span class="hljs-number">4</span> <span class="hljs-keyword">if</span> <span class="hljs-string">'♩'</span> <span class="hljs-keyword">in</span> note <span class="hljs-keyword">else</span> <span class="hljs-number">1</span>/<span class="hljs-number">8</span>) parse_note = <span class="hljs-keyword">lambda</span> note: (get_hz(note[:<span class="hljs-number">2</span>]), <span class="hljs-number">1</span>/<span class="hljs-number">4</span> <span class="hljs-keyword">if</span> <span class="hljs-string">'♩'</span> <span class="hljs-keyword">in</span> note <span class="hljs-keyword">else</span> <span class="hljs-number">1</span>/<span class="hljs-number">8</span>)
get_samples = <span class="hljs-keyword">lambda</span> note: get_wave(*parse_note(note)) <span class="hljs-keyword">if</span> note <span class="hljs-keyword">else</span> get_pause(<span class="hljs-number">1</span>/<span class="hljs-number">8</span>) get_samples = <span class="hljs-keyword">lambda</span> note: get_wave(*parse_note(note)) <span class="hljs-keyword">if</span> note <span class="hljs-keyword">else</span> get_pause(<span class="hljs-number">1</span>/<span class="hljs-number">8</span>)
samples_f = it.chain.from_iterable(get_samples(n) <span class="hljs-keyword">for</span> n <span class="hljs-keyword">in</span> <span class="hljs-string">f'<span class="hljs-subst">{P1}</span>,<span class="hljs-subst">{P1}</span>,<span class="hljs-subst">{P2}</span>'</span>.split(<span class="hljs-string">','</span>)) samples_f = it.chain.from_iterable(get_samples(n) <span class="hljs-keyword">for</span> n <span class="hljs-keyword">in</span> <span class="hljs-string">f'<span class="hljs-subst">{P1}</span>,<span class="hljs-subst">{P1}</span>,<span class="hljs-subst">{P2}</span>'</span>.split(<span class="hljs-string">','</span>))
samples_b = <span class="hljs-string">b''</span>.join(struct.pack(<span class="hljs-string">'&lt;h'</span>, int(f * <span class="hljs-number">30000</span>)) <span class="hljs-keyword">for</span> f <span class="hljs-keyword">in</span> samples_f)
simpleaudio.play_buffer(samples_b, <span class="hljs-number">1</span>, <span class="hljs-number">2</span>, F)
samples_i = array.array(<span class="hljs-string">'h'</span>, (int(f * <span class="hljs-number">30000</span>) <span class="hljs-keyword">for</span> f <span class="hljs-keyword">in</span> samples_f))
simpleaudio.play_buffer(samples_i, <span class="hljs-number">1</span>, <span class="hljs-number">2</span>, F)
</code></pre></div></div> </code></pre></div></div>

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