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python-cheatsheet
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Jure Šorn 2 years ago
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  1. 38
      README.md
  2. 42
      index.html

38
README.md
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@ -2732,25 +2732,25 @@ from PIL import Image
```
```python
<Image> = Image.new('<mode>', (width, height)) # Also: `color=<int/tuple/str>`.
<Image> = Image.open(<path>) # Identifies format based on file contents.
<Image> = <Image>.convert('<mode>') # Converts image to the new mode.
<Image>.save(<path>) # Selects format based on the path extension.
<Image>.show() # Opens image in default preview app.
<Image> = Image.new('<mode>', (width, height)) # Also: `color=<int/tuple/str>`.
<Image> = Image.open(<path>) # Identifies format based on file contents.
<Image> = <Image>.convert('<mode>') # Converts image to the new mode.
<Image>.save(<path>) # Selects format based on the path extension.
<Image>.show() # Opens image in default preview app.
```
```python
<int/tuple> = <Image>.getpixel((x, y)) # Returns a pixel.
<Image>.putpixel((x, y), <int/tuple>) # Writes a pixel to the image.
<ImagingCore> = <Image>.getdata() # Returns a flattened sequence of pixels.
<Image>.putdata(<list/ImagingCore>) # Writes a flattened sequence of pixels.
<Image>.paste(<Image>, (x, y)) # Writes passed image to the image.
<int/tuple> = <Image>.getpixel((x, y)) # Returns a pixel.
<Image>.putpixel((x, y), <int/tuple>) # Writes a pixel to the image.
<ImagingCore> = <Image>.getdata() # Returns a flattened sequence of pixels.
<Image>.putdata(<list/ImagingCore>) # Writes a flattened sequence of pixels.
<Image>.paste(<Image>, (x, y)) # Writes passed image to the image.
```
```bash
<2d_array> = np.array(<Image_L>) # Creates NumPy array from greyscale image.
<3d_array> = np.array(<Image_RGB>) # Creates NumPy array from color image.
<Image> = Image.fromarray(<array>) # Creates image from NumPy array of floats.
<2d_array> = np.array(<Image_L>) # Creates NumPy array from greyscale image.
<3d_array> = np.array(<Image_RGB/A>) # Creates NumPy array from color image.
<Image> = Image.fromarray(np.uint8(<array>)) # Use <array>.clip(0, 255) to clip the values.
```
### Modes
@ -2787,12 +2787,12 @@ from PIL import ImageDraw
```
```python
<ImageDraw>.point((x, y)) # Truncates floats into ints.
<ImageDraw>.line((x1, y1, x2, y2 [, ...])) # To get anti-aliasing use Image's resize().
<ImageDraw>.arc((x1, y1, x2, y2), deg1, deg2) # Always draws in clockwise direction.
<ImageDraw>.rectangle((x1, y1, x2, y2)) # To rotate use Image's rotate() and paste().
<ImageDraw>.polygon((x1, y1, x2, y2, ...)) # Last point gets connected to the first.
<ImageDraw>.ellipse((x1, y1, x2, y2)) # To rotate use Image's rotate() and paste().
<ImageDraw>.point((x, y)) # Truncates floats into ints.
<ImageDraw>.line((x1, y1, x2, y2 [, ...])) # To get anti-aliasing use Image's resize().
<ImageDraw>.arc((x1, y1, x2, y2), deg1, deg2) # Always draws in clockwise direction.
<ImageDraw>.rectangle((x1, y1, x2, y2)) # To rotate use Image's rotate() and paste().
<ImageDraw>.polygon((x1, y1, x2, y2, ...)) # Last point gets connected to the first.
<ImageDraw>.ellipse((x1, y1, x2, y2)) # To rotate use Image's rotate() and paste().
```
* **Use `'fill=<color>'` to set the primary color.**
* **Use `'width=<int>'` to set the width of lines or contours.**

42
index.html
View File

@ -54,7 +54,7 @@
<body>
<header>
<aside>July 29, 2022</aside>
<aside>July 30, 2022</aside>
<a href="https://gto76.github.io" rel="author">Jure Šorn</a>
</header>
@ -2229,21 +2229,21 @@ right = [[<span class="hljs-number">0.1</span>, <span class="hljs-number">0.6</
<span class="hljs-keyword">from</span> PIL <span class="hljs-keyword">import</span> Image
</code></pre></div>
<pre><code class="python language-python hljs">&lt;Image&gt; = Image.new(<span class="hljs-string">'&lt;mode&gt;'</span>, (width, height)) <span class="hljs-comment"># Also: `color=&lt;int/tuple/str&gt;`.</span>
&lt;Image&gt; = Image.open(&lt;path&gt;) <span class="hljs-comment"># Identifies format based on file contents.</span>
&lt;Image&gt; = &lt;Image&gt;.convert(<span class="hljs-string">'&lt;mode&gt;'</span>) <span class="hljs-comment"># Converts image to the new mode.</span>
&lt;Image&gt;.save(&lt;path&gt;) <span class="hljs-comment"># Selects format based on the path extension.</span>
&lt;Image&gt;.show() <span class="hljs-comment"># Opens image in default preview app.</span>
<pre><code class="python language-python hljs">&lt;Image&gt; = Image.new(<span class="hljs-string">'&lt;mode&gt;'</span>, (width, height)) <span class="hljs-comment"># Also: `color=&lt;int/tuple/str&gt;`.</span>
&lt;Image&gt; = Image.open(&lt;path&gt;) <span class="hljs-comment"># Identifies format based on file contents.</span>
&lt;Image&gt; = &lt;Image&gt;.convert(<span class="hljs-string">'&lt;mode&gt;'</span>) <span class="hljs-comment"># Converts image to the new mode.</span>
&lt;Image&gt;.save(&lt;path&gt;) <span class="hljs-comment"># Selects format based on the path extension.</span>
&lt;Image&gt;.show() <span class="hljs-comment"># Opens image in default preview app.</span>
</code></pre>
<pre><code class="python language-python hljs">&lt;int/tuple&gt; = &lt;Image&gt;.getpixel((x, y)) <span class="hljs-comment"># Returns a pixel.</span>
&lt;Image&gt;.putpixel((x, y), &lt;int/tuple&gt;) <span class="hljs-comment"># Writes a pixel to the image.</span>
&lt;ImagingCore&gt; = &lt;Image&gt;.getdata() <span class="hljs-comment"># Returns a flattened sequence of pixels.</span>
&lt;Image&gt;.putdata(&lt;list/ImagingCore&gt;) <span class="hljs-comment"># Writes a flattened sequence of pixels.</span>
&lt;Image&gt;.paste(&lt;Image&gt;, (x, y)) <span class="hljs-comment"># Writes passed image to the image.</span>
<pre><code class="python language-python hljs">&lt;int/tuple&gt; = &lt;Image&gt;.getpixel((x, y)) <span class="hljs-comment"># Returns a pixel.</span>
&lt;Image&gt;.putpixel((x, y), &lt;int/tuple&gt;) <span class="hljs-comment"># Writes a pixel to the image.</span>
&lt;ImagingCore&gt; = &lt;Image&gt;.getdata() <span class="hljs-comment"># Returns a flattened sequence of pixels.</span>
&lt;Image&gt;.putdata(&lt;list/ImagingCore&gt;) <span class="hljs-comment"># Writes a flattened sequence of pixels.</span>
&lt;Image&gt;.paste(&lt;Image&gt;, (x, y)) <span class="hljs-comment"># Writes passed image to the image.</span>
</code></pre>
<pre><code class="bash language-bash hljs">&lt;2d_array&gt; = np.array(&lt;Image_L&gt;) <span class="hljs-comment"># Creates NumPy array from greyscale image.</span>
&lt;3d_array&gt; = np.array(&lt;Image_RGB&gt;) <span class="hljs-comment"># Creates NumPy array from color image.</span>
&lt;Image&gt; = Image.fromarray(&lt;array&gt;) <span class="hljs-comment"># Creates image from NumPy array of floats.</span>
<pre><code class="bash language-bash hljs">&lt;2d_array&gt; = np.array(&lt;Image_L&gt;) <span class="hljs-comment"># Creates NumPy array from greyscale image.</span>
&lt;3d_array&gt; = np.array(&lt;Image_RGB/A&gt;) <span class="hljs-comment"># Creates NumPy array from color image.</span>
&lt;Image&gt; = Image.fromarray(np.uint8(&lt;array&gt;)) <span class="hljs-comment"># Use &lt;array&gt;.clip(0, 255) to clip the values.</span>
</code></pre>
<div><h3 id="modes-1">Modes</h3><ul>
<li><strong><code class="python hljs"><span class="hljs-string">'1'</span></code> - 1-bit pixels, black and white, stored with one pixel per byte.</strong></li>
@ -2273,12 +2273,12 @@ img.convert(<span class="hljs-string">'RGB'</span>).save(<span class="hljs-strin
&lt;ImageDraw&gt; = ImageDraw.Draw(&lt;Image&gt;)
</code></pre></div>
<pre><code class="python language-python hljs">&lt;ImageDraw&gt;.point((x, y)) <span class="hljs-comment"># Truncates floats into ints.</span>
&lt;ImageDraw&gt;.line((x1, y1, x2, y2 [, ...])) <span class="hljs-comment"># To get anti-aliasing use Image's resize().</span>
&lt;ImageDraw&gt;.arc((x1, y1, x2, y2), deg1, deg2) <span class="hljs-comment"># Always draws in clockwise direction.</span>
&lt;ImageDraw&gt;.rectangle((x1, y1, x2, y2)) <span class="hljs-comment"># To rotate use Image's rotate() and paste().</span>
&lt;ImageDraw&gt;.polygon((x1, y1, x2, y2, ...)) <span class="hljs-comment"># Last point gets connected to the first.</span>
&lt;ImageDraw&gt;.ellipse((x1, y1, x2, y2)) <span class="hljs-comment"># To rotate use Image's rotate() and paste().</span>
<pre><code class="python language-python hljs">&lt;ImageDraw&gt;.point((x, y)) <span class="hljs-comment"># Truncates floats into ints.</span>
&lt;ImageDraw&gt;.line((x1, y1, x2, y2 [, ...])) <span class="hljs-comment"># To get anti-aliasing use Image's resize().</span>
&lt;ImageDraw&gt;.arc((x1, y1, x2, y2), deg1, deg2) <span class="hljs-comment"># Always draws in clockwise direction.</span>
&lt;ImageDraw&gt;.rectangle((x1, y1, x2, y2)) <span class="hljs-comment"># To rotate use Image's rotate() and paste().</span>
&lt;ImageDraw&gt;.polygon((x1, y1, x2, y2, ...)) <span class="hljs-comment"># Last point gets connected to the first.</span>
&lt;ImageDraw&gt;.ellipse((x1, y1, x2, y2)) <span class="hljs-comment"># To rotate use Image's rotate() and paste().</span>
</code></pre>
<ul>
<li><strong>Use <code class="python hljs"><span class="hljs-string">'fill=&lt;color&gt;'</span></code> to set the primary color.</strong></li>
@ -2906,7 +2906,7 @@ $ pyinstaller script.py --add-data '&lt;path&gt;:.' <span class="hljs-comment">
<footer>
<aside>July 29, 2022</aside>
<aside>July 30, 2022</aside>
<a href="https://gto76.github.io" rel="author">Jure Šorn</a>
</footer>

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