擅长:python、mysql、java
<p>我认为对于布尔掩码和新列<a href="http://docs.scipy.org/doc/numpy-1.10.1/reference/generated/numpy.where.html" rel="nofollow noreferrer">^{<cd2>}</a>,您需要<a href="http://pandas.pydata.org/pandas-docs/stable/generated/pandas.Series.duplicated.html" rel="nofollow noreferrer">^{<cd1>}</a>:</p>
<pre><code>mask = df_picru['REF_INT'].duplicated(keep=False)
</code></pre>
<p>样品:</p>
^{pr2}$
<p>If need检查至少一个If <code>unique</code>值需要<a href="http://pandas.pydata.org/pandas-docs/stable/generated/pandas.Series.any.html" rel="nofollow noreferrer">^{<cd4>}</a>,以便将<code>boolean mask</code>-<code>array</code>转换为标量{<cd7>}或{<cd8>}:</p>
<pre><code>if mask.any():
print ('at least one unique')
at least one unique
</code></pre>