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python-cheatsheet
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Class, Table, Wave

pull/135/head
Jure Šorn 2 years ago
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2 changed files with 14 additions and 12 deletions
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  1. 11
      README.md
  2. 15
      index.html

11
README.md
View File

@ -964,6 +964,7 @@ class <name>:
```
* **Return value of repr() should be unambiguous and of str() readable.**
* **If only repr() is defined, it will also be used for str().**
* **Methods decorated with `'@staticmethod'` do not receive 'self' nor 'cls' as their first arg.**
#### Str() use cases:
```python
@ -2400,7 +2401,7 @@ Table
import csv, tabulate
with open('test.csv', encoding='utf-8', newline='') as file:
rows = csv.reader(file)
header = [a.title() for a in next(rows)]
header = next(rows)
table = tabulate.tabulate(rows, header)
print(table)
```
@ -2548,8 +2549,8 @@ def send_json(sport):
>>> import threading, requests
>>> threading.Thread(target=run, daemon=True).start()
>>> url = 'http://localhost:8080/football/odds'
>>> data = {'team': 'arsenal f.c.'}
>>> response = requests.post(url, data=data)
>>> request_data = {'team': 'arsenal f.c.'}
>>> response = requests.post(url, data=request_data)
>>> response.json()
{'team': 'arsenal f.c.', 'odds': [2.09, 3.74, 3.68]}
```
@ -2891,7 +2892,7 @@ def write_to_wav_file(filename, float_samples, nchannels=1, sampwidth=2, framera
```
### Examples
#### Saves a sine wave to a mono WAV file:
#### Saves a 440 Hz sine wave to a mono WAV file:
```python
from math import pi, sin
samples_f = (sin(i * 2 * pi * 440 / 44100) for i in range(100000))
@ -3494,7 +3495,7 @@ import <cython_script>
```python
cdef <ctype> <var_name> = <el>
cdef <ctype>[n_elements] <var_name> = [<el_1>, <el_2>, ...]
cdef <ctype/void> <func_name>(<ctype> <arg_name_1>, ...):
cdef <ctype/void> <func_name>(<ctype> <arg_name_1>, ...): …
```
```python

15
index.html
View File

@ -54,7 +54,7 @@
<body>
<header>
<aside>June 2, 2022</aside>
<aside>June 3, 2022</aside>
<a href="https://gto76.github.io" rel="author">Jure Šorn</a>
</header>
@ -825,6 +825,7 @@ creature = Creature(point, direction)
<ul>
<li><strong>Return value of repr() should be unambiguous and of str() readable.</strong></li>
<li><strong>If only repr() is defined, it will also be used for str().</strong></li>
<li><strong>Methods decorated with <code class="python hljs"><span class="hljs-string">'@staticmethod'</span></code> do not receive 'self' nor 'cls' as their first arg.</strong></li>
</ul>
<div><h4 id="strusecases">Str() use cases:</h4><pre><code class="python language-python hljs">print(&lt;el&gt;)
<span class="hljs-string">f'<span class="hljs-subst">{&lt;el&gt;}</span>'</span>
@ -1967,7 +1968,7 @@ plt.clf() <span class="hljs-comment"># Clea
<span class="hljs-keyword">import</span> csv, tabulate
<span class="hljs-keyword">with</span> open(<span class="hljs-string">'test.csv'</span>, encoding=<span class="hljs-string">'utf-8'</span>, newline=<span class="hljs-string">''</span>) <span class="hljs-keyword">as</span> file:
rows = csv.reader(file)
header = [a.title() <span class="hljs-keyword">for</span> a <span class="hljs-keyword">in</span> next(rows)]
header = next(rows)
table = tabulate.tabulate(rows, header)
print(table)
</code></pre></div></div>
@ -2087,8 +2088,8 @@ run(host=<span class="hljs-string">'0.0.0.0'</span>, port=<span class="hljs-numb
<span class="hljs-meta">&gt;&gt;&gt; </span><span class="hljs-keyword">import</span> threading, requests
<span class="hljs-meta">&gt;&gt;&gt; </span>threading.Thread(target=run, daemon=<span class="hljs-keyword">True</span>).start()
<span class="hljs-meta">&gt;&gt;&gt; </span>url = <span class="hljs-string">'http://localhost:8080/football/odds'</span>
<span class="hljs-meta">&gt;&gt;&gt; </span>data = {<span class="hljs-string">'team'</span>: <span class="hljs-string">'arsenal f.c.'</span>}
<span class="hljs-meta">&gt;&gt;&gt; </span>response = requests.post(url, data=data)
<span class="hljs-meta">&gt;&gt;&gt; </span>request_data = {<span class="hljs-string">'team'</span>: <span class="hljs-string">'arsenal f.c.'</span>}
<span class="hljs-meta">&gt;&gt;&gt; </span>response = requests.post(url, data=request_data)
<span class="hljs-meta">&gt;&gt;&gt; </span>response.json()
{<span class="hljs-string">'team'</span>: <span class="hljs-string">'arsenal f.c.'</span>, <span class="hljs-string">'odds'</span>: [<span class="hljs-number">2.09</span>, <span class="hljs-number">3.74</span>, <span class="hljs-number">3.68</span>]}
</code></pre></div>
@ -2354,7 +2355,7 @@ nframes = &lt;Wave_read&gt;.getnframes() <span class="hljs-comment"
file.writeframes(<span class="hljs-string">b''</span>.join(get_bytes(f) <span class="hljs-keyword">for</span> f <span class="hljs-keyword">in</span> float_samples))
</code></pre></div>
<div><h3 id="examples-1">Examples</h3><div><h4 id="savesasinewavetoamonowavfile">Saves a sine wave to a mono WAV file:</h4><pre><code class="python language-python hljs"><span class="hljs-keyword">from</span> math <span class="hljs-keyword">import</span> pi, sin
<div><h3 id="examples-1">Examples</h3><div><h4 id="savesa440hzsinewavetoamonowavfile">Saves a 440 Hz sine wave to a mono WAV file:</h4><pre><code class="python language-python hljs"><span class="hljs-keyword">from</span> math <span class="hljs-keyword">import</span> pi, sin
samples_f = (sin(i * <span class="hljs-number">2</span> * pi * <span class="hljs-number">440</span> / <span class="hljs-number">44100</span>) <span class="hljs-keyword">for</span> i <span class="hljs-keyword">in</span> range(<span class="hljs-number">100000</span>))
write_to_wav_file(<span class="hljs-string">'test.wav'</span>, samples_f)
</code></pre></div></div>
@ -2839,7 +2840,7 @@ print(<span class="hljs-string">f'Hello <span class="hljs-subst">{values[<span c
<li><strong>Script needs to be saved with a <code class="python hljs"><span class="hljs-string">'pyx'</span></code> extension.</strong></li>
</ul><pre><code class="python language-python hljs">cdef &lt;ctype&gt; &lt;var_name&gt; = &lt;el&gt;
cdef &lt;ctype&gt;[n_elements] &lt;var_name&gt; = [&lt;el_1&gt;, &lt;el_2&gt;, ...]
cdef &lt;ctype/void&gt; &lt;func_name&gt;(&lt;ctype&gt; &lt;arg_name_1&gt;, ...):
cdef &lt;ctype/void&gt; &lt;func_name&gt;(&lt;ctype&gt; &lt;arg_name_1&gt;, ...): …
</code></pre></div>
@ -2896,7 +2897,7 @@ $ pyinstaller script.py --add-data '&lt;path&gt;:.' <span class="hljs-comment">
<footer>
<aside>June 2, 2022</aside>
<aside>June 3, 2022</aside>
<a href="https://gto76.github.io" rel="author">Jure Šorn</a>
</footer>

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