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python-cheatsheet
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Datetime, Pandas

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Jure Šorn 2 weeks ago
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2 changed files with 6 additions and 6 deletions
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  1. 4
      README.md
  2. 8
      index.html

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README.md
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@ -632,7 +632,7 @@ import zoneinfo, dateutil.tz
### Encode
```python
<D/T/DT> = D/T/DT.fromisoformat(<str>) # Object from ISO string. Raises ValueError.
<DT> = DT.strptime(<str>, '<format>') # Datetime from str, according to format.
<DT> = DT.strptime(<str>, '<format>') # Datetime from custom string. See Format.
<D/DTn> = D/DT.fromordinal(<int>) # D/DT from days since the Gregorian NYE 1.
<DTn> = DT.fromtimestamp(<float>) # Local naive DT from seconds since the Epoch.
<DTa> = DT.fromtimestamp(<float>, <tz>) # Aware datetime from seconds since the Epoch.
@ -3349,7 +3349,7 @@ c 6 7
<DF> = pd.read_csv/excel(<path/url/file>) # Also `header/index_col/dtype/usecols/…=<obj>`.
<list> = pd.read_html(<path/url/file>) # Raises ImportError if webpage has zero tables.
<S/DF> = pd.read_parquet/feather/hdf(<path…>) # Function read_hdf() accepts `key=<s/df_name>`.
<DF> = pd.read_sql('<table/query>', <conn>) # Pass SQLite3/Alchemy connection (see #SQLite).
<DF> = pd.read_sql('<table/query>', <conn>) # Pass SQLite3/Alchemy connection. See #SQLite.
```
```python

8
index.html
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@ -56,7 +56,7 @@
<body>
<header>
<aside>March 29, 2025</aside>
<aside>March 30, 2025</aside>
<a href="https://gto76.github.io" rel="author">Jure Šorn</a>
</header>
@ -562,7 +562,7 @@ shuffle(&lt;list&gt;) <span class="hljs-commen
<li><strong>To get ZoneInfo() to work on Windows run <code class="python hljs"><span class="hljs-string">'&gt; pip3 install tzdata'</span></code>.</strong></li>
</ul>
<div><h3 id="encode">Encode</h3><pre><code class="python language-python apache hljs">&lt;D/T/DT&gt; = D/T/DT.fromisoformat(&lt;str&gt;) <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;DT&gt; = DT.strptime(&lt;str&gt;, <span class="hljs-string">'&lt;format&gt;'</span>) <span class="hljs-comment"># Datetime from custom string. See Format.</span>
&lt;D/DTn&gt; = D/DT.fromordinal(&lt;int&gt;) <span class="hljs-comment"># D/DT from days since the Gregorian NYE 1.</span>
&lt;DTn&gt; = DT.fromtimestamp(&lt;float&gt;) <span class="hljs-comment"># Local naive DT from seconds since the Epoch.</span>
&lt;DTa&gt; = DT.fromtimestamp(&lt;float&gt;, &lt;tz&gt;) <span class="hljs-comment"># Aware datetime from seconds since the Epoch.</span>
@ -2744,7 +2744,7 @@ c <span class="hljs-number">6</span> <span class="hljs-number">7</span>
&lt;DF&gt; = pd.read_csv/excel(&lt;path/url/file&gt;) <span class="hljs-comment"># Also `header/index_col/dtype/usecols/…=&lt;obj&gt;`.</span>
&lt;list&gt; = pd.read_html(&lt;path/url/file&gt;) <span class="hljs-comment"># Raises ImportError if webpage has zero tables.</span>
&lt;S/DF&gt; = pd.read_parquet/feather/hdf(&lt;path…&gt;) <span class="hljs-comment"># Function read_hdf() accepts `key=&lt;s/df_name&gt;`.</span>
&lt;DF&gt; = pd.read_sql(<span class="hljs-string">'&lt;table/query&gt;'</span>, &lt;conn&gt;) <span class="hljs-comment"># Pass SQLite3/Alchemy connection (see #SQLite).</span>
&lt;DF&gt; = pd.read_sql(<span class="hljs-string">'&lt;table/query&gt;'</span>, &lt;conn&gt;) <span class="hljs-comment"># Pass SQLite3/Alchemy connection. See #SQLite.</span>
</code></pre></div>
<pre><code class="python language-python hljs">&lt;DF&gt;.to_json/csv/html/parquet/latex(&lt;path&gt;) <span class="hljs-comment"># Returns a string/bytes if path is omitted.</span>
@ -2944,7 +2944,7 @@ $ deactivate <span class="hljs-comment"># Deactivates the active
<footer>
<aside>March 29, 2025</aside>
<aside>March 30, 2025</aside>
<a href="https://gto76.github.io" rel="author">Jure Šorn</a>
</footer>

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