擅长:python、mysql、java
<p><a href="https://pandas.pydata.org/pandas-docs/stable/generated/pandas.factorize.html" rel="nofollow noreferrer">^{<cd1>}</a>是一种方法:</p>
<pre><code>import pandas as pd
lst = [2, 3, 4, 5, 4, 3]
res = pd.factorize(lst, sort=True)[0]
# [0 1 2 3 2 1]
</code></pre>
<p><strong>注意</strong>:这将返回一个列表,而<code>np.unique</code>将始终返回一个<code>np.ndarray</code>。在</p>