<li><strong>Use <codeclass="python hljs"><spanclass="hljs-string">'<D/DT>.weekday()'</span></code> to get the day of the week (Mon == 0).</strong></li>
<li><strong><codeclass="python hljs"><spanclass="hljs-string">'fold=1'</span></code> means the second pass in case of time jumping back for one hour.</strong></li>
<li><strong><codeclass="python hljs"><spanclass="hljs-string">'<DTa> = resolve_imaginary(<DTa>)'</span></code> fixes DTs that fall into the missing hour.</strong></li>
<li><strong><codeclass="python hljs"><spanclass="hljs-string">'<DTa> = resolve_imaginary(<DTa>)'</span></code> fixes DTs that fall into missing hour.</strong></li>
</ul>
<div><h3id="now">Now</h3><pre><codeclass="python language-python hljs"><D/DTn> = D/DT.today() <spanclass="hljs-comment"># Current local date or naive datetime.</span>
<DTn> = DT.utcnow() <spanclass="hljs-comment"># Naive datetime from current UTC time.</span>
<li><strong>File must be opened with <codeclass="python hljs"><spanclass="hljs-string">'newline=""'</span></code> argument, or newlines embedded inside quoted fields will not be interpreted correctly!</strong></li>
<li><strong>File must be opened with a <codeclass="python hljs"><spanclass="hljs-string">'newline=""'</span></code> argument, or newlines embedded inside quoted fields will not be interpreted correctly!</strong></li>
<li><strong>File must be opened with <codeclass="python hljs"><spanclass="hljs-string">'newline=""'</span></code> argument, or '\r' will be added in front of every '\n' on platforms that use '\r\n' line endings!</strong></li>
<li><strong>File must be opened with a <codeclass="python hljs"><spanclass="hljs-string">'newline=""'</span></code> argument, or '\r' will be added in front of every '\n' on platforms that use '\r\n' line endings!</strong></li>
</ul>
<div><h3id="parameters">Parameters</h3><ul>
<li><strong><codeclass="python hljs"><spanclass="hljs-string">'dialect'</span></code> - Master parameter that sets the default values.</strong></li>
<li><strong><codeclass="python hljs"><spanclass="hljs-string">'quoting'</span></code> - Controls the amount of quoting: 0 - as necessary, 1 - all.</strong></li>
<li><strong><codeclass="python hljs"><spanclass="hljs-string">'escapechar'</span></code> - Character for escaping 'quotechar' if 'doublequote' is False.</strong></li>
<div><h3id="example">Example</h3><p><strong>In this example values are not actually saved because <codeclass="python hljs"><spanclass="hljs-string">'conn.commit()'</span></code> is omitted!</strong></p><pre><codeclass="python language-python hljs"><spanclass="hljs-meta">>>></span>conn = sqlite3.connect(<spanclass="hljs-string">'test.db'</span>)
<spanclass="hljs-meta">>>></span>conn.execute(<spanclass="hljs-string">'create table person (person_id integer primary key, name, height)'</span>)
<spanclass="hljs-meta">>>></span>conn.execute(<spanclass="hljs-string">'insert into person values (null, ?, ?)'</span>, (<spanclass="hljs-string">'Jean-Luc'</span>, <spanclass="hljs-number">187</span>)).lastrowid
<spanclass="hljs-meta">>>></span>conn.execute(<spanclass="hljs-string">'CREATE TABLE person (person_id INTEGER PRIMARY KEY, name, height)'</span>)
<spanclass="hljs-meta">>>></span>conn.execute(<spanclass="hljs-string">'INSERT INTO person VALUES (NULL, ?, ?)'</span>, (<spanclass="hljs-string">'Jean-Luc'</span>, <spanclass="hljs-number">187</span>)).lastrowid
<spanclass="hljs-number">1</span>
<spanclass="hljs-meta">>>></span>conn.execute(<spanclass="hljs-string">'select * from person'</span>).fetchall()
<spanclass="hljs-meta">>>></span>conn.execute(<spanclass="hljs-string">'SELECT * FROM person'</span>).fetchall()
<li><strong>If row and column indexes differ in shape, they are combined with broadcasting.</strong></li>
</ul>
<div><h3id="broadcasting">Broadcasting</h3><p><strong>Broadcasting is a set of rules by which NumPy functions operate on arrays of different sizes and/or dimensions.</strong></p><pre><codeclass="python language-python hljs">left = [[<spanclass="hljs-number">0.1</span>], [<spanclass="hljs-number">0.6</span>], [<spanclass="hljs-number">0.8</span>]] <spanclass="hljs-comment"># Shape: (3, 1)</span>
Jure Šorn
4 years ago