擅长:python、mysql、java
<p>从<a href="https://scikit-learn.org/stable/modules/generated/sklearn.pipeline.Pipeline.html" rel="nofollow noreferrer">the documentation</a>到<code>Pipeline</code>:</p>
<blockquote>
<p>A step’s estimator may be replaced entirely by setting the parameter with its name to another estimator, or a transformer removed by setting it to ‘passthrough’ or <code>None</code>.</p>
</blockquote>
<p>例如:</p>
<pre class="lang-py prettyprint-override"><code>pipe = Pipeline([
('scale', StandardScaler()),
('mnl', mnl),
])
params = {
'scale': ['passthrough', StandardScaler()],
'mnl__solver': ['newton-cg', 'lbfgs', 'liblinear', 'sag', 'saga'],
'mnl__max_iter': [500, 1000, 2000, 3000],
}
</code></pre>