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python-cheatsheet
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Jure Šorn 4 years ago
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  1. 26
      README.md
  2. 24
      index.html

26
README.md
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@ -1572,9 +1572,9 @@ from glob import glob
```
```python
<bool> = path.exists('<path>')
<bool> = path.isfile('<path>')
<bool> = path.isdir('<path>')
<str> = path.basename('<path>') # Returns final component.
<str> = path.dirname('<path>') # Returns path without final component.
<tup.> = path.splitext('<path>') # Splits on last period of final component.
```
```python
@ -1582,20 +1582,14 @@ from glob import glob
<list> = glob('<pattern>') # Returns paths matching the wildcard pattern.
```
```python
<str> = path.basename('<path>') # Returns final component.
<str> = path.dirname('<path>') # Returns path without final component.
<str> = path.splitext('<path>')[1] # Returns final component's extension.
```
### Pathlib
### Path Object
```python
from pathlib import Path
```
```python
<Path> = Path('<path>' [, '<path>', <Path>, ...])
<Path> = <Path> / '<dir>' / '<file>'
<Path> = Path(<path> [, ...]) # Accepts strings, Paths and DirEntry objects.
<Path> = <path> / <path> [/ ...] # One of the paths must be a Path object.
```
```python
@ -1606,9 +1600,9 @@ from pathlib import Path
```
```python
<bool> = <Path>.exists()
<bool> = <Path>.is_file()
<bool> = <Path>.is_dir()
<bool> = <Path>.exists() # Or: path.exists('<path>')
<bool> = <Path>.is_file() # Or: path.isfile('<path>')
<bool> = <Path>.is_dir() # Or: path.isdir('<path>')
```
```python
@ -1629,7 +1623,7 @@ from pathlib import Path
```
### DirEntry
**Using scandir() instead of listdir() can significantly increase the performance of code that also needs file type or file attribute information.**
**Using scandir() instead of listdir() or iterdir() can significantly increase the performance of code that also needs file type or file attribute information.**
```python
<iter> = os.scandir(path='.') # Returns DirEntry objects located at path.
```

24
index.html
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@ -1451,31 +1451,27 @@ value = args.&lt;name&gt;
&lt;str&gt; = path.join(<span class="hljs-string">'&lt;path&gt;'</span>, ...) <span class="hljs-comment"># Joins two or more pathname components.</span>
&lt;str&gt; = path.abspath(<span class="hljs-string">'&lt;path&gt;'</span>) <span class="hljs-comment"># Return an absolute path.</span>
</code></pre>
<pre><code class="python language-python hljs">&lt;bool&gt; = path.exists(<span class="hljs-string">'&lt;path&gt;'</span>)
&lt;bool&gt; = path.isfile(<span class="hljs-string">'&lt;path&gt;'</span>)
&lt;bool&gt; = path.isdir(<span class="hljs-string">'&lt;path&gt;'</span>)
<pre><code class="python language-python hljs">&lt;str&gt; = path.basename(<span class="hljs-string">'&lt;path&gt;'</span>) <span class="hljs-comment"># Returns final component.</span>
&lt;str&gt; = path.dirname(<span class="hljs-string">'&lt;path&gt;'</span>) <span class="hljs-comment"># Returns path without final component.</span>
&lt;tup.&gt; = path.splitext(<span class="hljs-string">'&lt;path&gt;'</span>) <span class="hljs-comment"># Splits on last period of final component.</span>
</code></pre>
<pre><code class="python language-python hljs">&lt;list&gt; = listdir(<span class="hljs-string">'&lt;path&gt;'</span>) <span class="hljs-comment"># Returns filenames located at path.</span>
&lt;list&gt; = glob(<span class="hljs-string">'&lt;pattern&gt;'</span>) <span class="hljs-comment"># Returns paths matching the wildcard pattern.</span>
</code></pre>
<pre><code class="python language-python hljs">&lt;str&gt; = path.basename(<span class="hljs-string">'&lt;path&gt;'</span>) <span class="hljs-comment"># Returns final component.</span>
&lt;str&gt; = path.dirname(<span class="hljs-string">'&lt;path&gt;'</span>) <span class="hljs-comment"># Returns path without final component.</span>
&lt;str&gt; = path.splitext(<span class="hljs-string">'&lt;path&gt;'</span>)[<span class="hljs-number">1</span>] <span class="hljs-comment"># Returns final component's extension.</span>
</code></pre>
<div><h3 id="pathlib">Pathlib</h3><pre><code class="python language-python hljs"><span class="hljs-keyword">from</span> pathlib <span class="hljs-keyword">import</span> Path
<div><h3 id="pathobject">Path Object</h3><pre><code class="python language-python hljs"><span class="hljs-keyword">from</span> pathlib <span class="hljs-keyword">import</span> Path
</code></pre></div>
<pre><code class="python language-python hljs">&lt;Path&gt; = Path(<span class="hljs-string">'&lt;path&gt;'</span> [, <span class="hljs-string">'&lt;path&gt;'</span>, &lt;Path&gt;, ...])
&lt;Path&gt; = &lt;Path&gt; / <span class="hljs-string">'&lt;dir&gt;'</span> / <span class="hljs-string">'&lt;file&gt;'</span>
<pre><code class="python language-python hljs">&lt;Path&gt; = Path(&lt;path&gt; [, ...]) <span class="hljs-comment"># Accepts strings, Paths and DirEntry objects.</span>
&lt;Path&gt; = &lt;path&gt; / &lt;path&gt; [/ ...] <span class="hljs-comment"># One of the paths must be a Path object.</span>
</code></pre>
<pre><code class="python language-python hljs">&lt;Path&gt; = Path() <span class="hljs-comment"># Or: Path('.')</span>
&lt;Path&gt; = Path.cwd() <span class="hljs-comment"># Returns absolute cwd. Or: Path().resolve()</span>
&lt;Path&gt; = &lt;Path&gt;.resolve() <span class="hljs-comment"># Returns absolute Path without symlinks.</span>
&lt;Path&gt; = &lt;Path&gt;.parent <span class="hljs-comment"># Returns Path without final component.</span>
</code></pre>
<pre><code class="python language-python hljs">&lt;bool&gt; = &lt;Path&gt;.exists()
&lt;bool&gt; = &lt;Path&gt;.is_file()
&lt;bool&gt; = &lt;Path&gt;.is_dir()
<pre><code class="python language-python hljs">&lt;bool&gt; = &lt;Path&gt;.exists() <span class="hljs-comment"># Or: path.exists('&lt;path&gt;')</span>
&lt;bool&gt; = &lt;Path&gt;.is_file() <span class="hljs-comment"># Or: path.isfile('&lt;path&gt;')</span>
&lt;bool&gt; = &lt;Path&gt;.is_dir() <span class="hljs-comment"># Or: path.isdir('&lt;path&gt;')</span>
</code></pre>
<pre><code class="python language-python hljs">&lt;iter&gt; = &lt;Path&gt;.iterdir() <span class="hljs-comment"># Returns dir contents as relative (not true) Path objects.</span>
&lt;iter&gt; = &lt;Path&gt;.glob(<span class="hljs-string">'&lt;pattern&gt;'</span>) <span class="hljs-comment"># Returns relative Paths matching the wildcard pattern.</span>
@ -1488,7 +1484,7 @@ value = args.&lt;name&gt;
</code></pre>
<pre><code class="python language-python hljs">&lt;file&gt; = open(&lt;Path&gt;) <span class="hljs-comment"># Opens the file and returns a file object.</span>
</code></pre>
<div><h3 id="direntry">DirEntry</h3><p><strong>Using scandir() instead of listdir() can significantly increase the performance of code that also needs file type or file attribute information.</strong></p><pre><code class="python language-python hljs">&lt;iter&gt; = os.scandir(path=<span class="hljs-string">'.'</span>) <span class="hljs-comment"># Returns DirEntry objects located at path.</span>
<div><h3 id="direntry">DirEntry</h3><p><strong>Using scandir() instead of listdir() or iterdir() can significantly increase the performance of code that also needs file type or file attribute information.</strong></p><pre><code class="python language-python hljs">&lt;iter&gt; = os.scandir(path=<span class="hljs-string">'.'</span>) <span class="hljs-comment"># Returns DirEntry objects located at path.</span>
</code></pre></div>

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