擅长:python、mysql、java
<p>使用<a href="https://docs.scipy.org/doc/numpy/reference/generated/numpy.where.html" rel="nofollow noreferrer">^{<cd1>}</a>:</p>
<pre><code>df1['Exists']=np.where(df1['Player'].str.upper().isin(df2['Player Name'].str.upper()),'Exists','')
</code></pre>