擅长:python、mysql、java
<p>我认为需要<a href="http://pandas.pydata.org/pandas-docs/stable/generated/pandas.Series.isin.html" rel="nofollow noreferrer">^{<cd1>}</a>和<a href="http://pandas.pydata.org/pandas-docs/stable/indexing.html#boolean-indexing" rel="nofollow noreferrer">^{<cd2>}</a>:</p>
<pre><code>#for Series
s = master_df.loc[master_df['item'].isin(df['item']),'result']
print (s)
0 5
2 3
84376253 7
Name: result, dtype: int64
#for list
L = master_df.loc[master_df['item'].isin(df['item']),'result'].tolist()
print (L)
[5, 3, 7]
#for DataFrame
df1 = master_df[master_df['item'].isin(df['item'])]
print (df1)
result item
0 5 id13
2 3 id2832
84376253 7 id9632
</code></pre>