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python-cheatsheet
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A few fixes

pull/42/head
Jure Šorn 5 years ago
parent
d52aa6f0d6
commit
9d306ffd78
2 changed files with 15 additions and 13 deletions
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  1. 13
      README.md
  2. 15
      index.html

13
README.md
View File

@ -87,7 +87,7 @@ value = <dict>.setdefault(key, default=None) # Same, but also adds default to
```
```python
value = <dict>.pop(key) # Removes item from dictionary.
value = <dict>.pop(key) # Removes item or raises KeyError.
{k: v for k, v in <dict>.items() if k in keys} # Filters dictionary by keys.
```
@ -354,6 +354,7 @@ import re
<iter> = re.finditer(<regex>, text) # Returns all occurrences as match objects.
```
* **Search() and match() return None if there are no matches.**
* **Argument `'flags=re.IGNORECASE'` can be used with all functions.**
* **Argument `'flags=re.MULTILINE'` makes `'^'` and `'$'` match the start/end of each line.**
* **Argument `'flags=re.DOTALL'` makes dot also accept newline.**
@ -610,7 +611,7 @@ from dateutil.tz import UTC, tzlocal, gettz
```python
<tzinfo> = UTC # UTC timezone. London without DST.
<tzinfo> = tzlocal() # Local timezone. Also gettz().
<tzinfo> = gettz('<Cont.>/<City>') # Timezone from 'Continent/City_Name' str.
<tzinfo> = gettz('<Cont.>/<City>') # 'Continent/City_Name' timezone or None.
```
```python
@ -620,7 +621,7 @@ from dateutil.tz import UTC, tzlocal, gettz
### Encode
```python
<D/T/DT> = D/T/DT.fromisoformat('<iso>') # Object from ISO string.
<D/T/DT> = D/T/DT.fromisoformat('<iso>') # Object from ISO string. Raises ValueError.
<DT> = DT.strptime(<str>, '<format>') # Datetime from str, according to format.
<D/DTn> = D/DT.fromordinal(<int>) # D/DTn from days since Christ, at midnight.
<DTn> = DT.fromtimestamp(<real>) # Local time DTn from seconds since Epoch.
@ -1296,9 +1297,9 @@ class <enum_name>(Enum):
```python
<member> = <enum>.<member_name>
<member> = <enum>['<member_name>']
<member> = <enum>(<value>)
<member> = <enum>.<member_name> # Returns a member.
<member> = <enum>['<member_name>'] # Returns a member or raises KeyError.
<member> = <enum>(<value>) # Returns a member or raises ValueError.
name = <member>.name
value = <member>.value
```

15
index.html
View File

@ -271,7 +271,7 @@ value = &lt;dict&gt;.setdefault(key, default=<span class="hljs-keyword">None</s
&lt;dict&gt; = dict(zip(keys, values)) <span class="hljs-comment"># Creates a dict from two collections.</span>
&lt;dict&gt; = dict.fromkeys(keys [, value]) <span class="hljs-comment"># Creates a dict from collection of keys.</span>
</code></pre>
<pre><code class="python language-python hljs">value = &lt;dict&gt;.pop(key) <span class="hljs-comment"># Removes item from dictionary.</span>
<pre><code class="python language-python hljs">value = &lt;dict&gt;.pop(key) <span class="hljs-comment"># Removes item or raises KeyError.</span>
{k: v <span class="hljs-keyword">for</span> k, v <span class="hljs-keyword">in</span> &lt;dict&gt;.items() <span class="hljs-keyword">if</span> k <span class="hljs-keyword">in</span> keys} <span class="hljs-comment"># Filters dictionary by keys.</span>
</code></pre>
<div><h3 id="counter">Counter</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> Counter
@ -459,6 +459,7 @@ to_exclusive = &lt;range&gt;.stop
</code></pre></div>
<ul>
<li><strong>Search() and match() return None if there are no matches.</strong></li>
<li><strong>Argument <code class="python hljs"><span class="hljs-string">'flags=re.IGNORECASE'</span></code> can be used with all functions.</strong></li>
<li><strong>Argument <code class="python hljs"><span class="hljs-string">'flags=re.MULTILINE'</span></code> makes <code class="python hljs"><span class="hljs-string">'^'</span></code> and <code class="python hljs"><span class="hljs-string">'$'</span></code> match the start/end of each line.</strong></li>
<li><strong>Argument <code class="python hljs"><span class="hljs-string">'flags=re.DOTALL'</span></code> makes dot also accept newline.</strong></li>
@ -660,14 +661,14 @@ shuffle(&lt;list&gt;)
</ul>
<div><h3 id="timezone">Timezone</h3><pre><code class="python language-python hljs">&lt;tzinfo&gt; = UTC <span class="hljs-comment"># UTC timezone. London without DST.</span>
&lt;tzinfo&gt; = tzlocal() <span class="hljs-comment"># Local timezone. Also gettz().</span>
&lt;tzinfo&gt; = gettz(<span class="hljs-string">'&lt;Cont.&gt;/&lt;City&gt;'</span>) <span class="hljs-comment"># Timezone from 'Continent/City_Name' str.</span>
&lt;tzinfo&gt; = gettz(<span class="hljs-string">'&lt;Cont.&gt;/&lt;City&gt;'</span>) <span class="hljs-comment"># 'Continent/City_Name' timezone or None.</span>
</code></pre></div>
<pre><code class="python language-python apache hljs">&lt;DTa&gt; = &lt;DT&gt;.astimezone(&lt;tzinfo&gt;) <span class="hljs-comment"># Datetime, converted to passed timezone.</span>
&lt;Ta/DTa&gt; = &lt;T/DT&gt;.replace(tzinfo=&lt;tzinfo&gt;) <span class="hljs-comment"># Unconverted object with new timezone.</span>
</code></pre>
<div><h3 id="encode">Encode</h3><pre><code class="python language-python apache hljs">&lt;D/T/DT&gt; = D/T/DT.fromisoformat(<span class="hljs-string">'&lt;iso&gt;'</span>) <span class="hljs-comment"># Object from ISO string.</span>
&lt;DT&gt; = DT.strptime(&lt;str&gt;, <span class="hljs-string">'&lt;format&gt;'</span>) <span class="hljs-comment"># Datetime from str, according to format.</span>
<div><h3 id="encode">Encode</h3><pre><code class="python language-python apache hljs">&lt;D/T/DT&gt; = D/T/DT.fromisoformat(<span class="hljs-string">'&lt;iso&gt;'</span>) <span class="hljs-comment"># Object from ISO string. Raises ValueError.</span>
&lt;DT&gt; = DT.strptime(&lt;str&gt;, <span class="hljs-string">'&lt;format&gt;'</span>) <span class="hljs-comment"># Datetime from str, according to format. </span>
&lt;D/DTn&gt; = D/DT.fromordinal(&lt;int&gt;) <span class="hljs-comment"># D/DTn from days since Christ, at midnight.</span>
&lt;DTn&gt; = DT.fromtimestamp(&lt;real&gt;) <span class="hljs-comment"># Local time DTn from seconds since Epoch.</span>
&lt;DTa&gt; = DT.fromtimestamp(&lt;real&gt;, &lt;tz.&gt;) <span class="hljs-comment"># Aware datetime from seconds since Epoch.</span>
@ -1218,9 +1219,9 @@ lock = threading.RLock(); <span class="hljs-keyword">with</span> lock: ...
<li><strong>If there are no numeric values before auto(), it returns 1.</strong></li>
<li><strong>Otherwise it returns an increment of last numeric value.</strong></li>
</ul>
<pre><code class="python language-python hljs">&lt;member&gt; = &lt;enum&gt;.&lt;member_name&gt;
&lt;member&gt; = &lt;enum&gt;[<span class="hljs-string">'&lt;member_name&gt;'</span>]
&lt;member&gt; = &lt;enum&gt;(&lt;value&gt;)
<pre><code class="python language-python hljs">&lt;member&gt; = &lt;enum&gt;.&lt;member_name&gt; <span class="hljs-comment"># Returns a member.</span>
&lt;member&gt; = &lt;enum&gt;[<span class="hljs-string">'&lt;member_name&gt;'</span>] <span class="hljs-comment"># Returns a member or raises KeyError.</span>
&lt;member&gt; = &lt;enum&gt;(&lt;value&gt;) <span class="hljs-comment"># Returns a member or raises ValueError.</span>
name = &lt;member&gt;.name
value = &lt;member&gt;.value
</code></pre>

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