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<p>一个数据帧作为</p>
<pre class="lang-py prettyprint-override"><code>first = pd.DataFrame({'Code': [1,2,3,4],'Value': ['Apple','Ornage','Bannana', 'Graps']})
</code></pre>
<p><a href="https://i.stack.imgur.com/xTPOa.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/xTPOa.png" alt="enter image description here"/></a></p>
<p>另一个数据帧是</p>
<pre class="lang-py prettyprint-override"><code>second= pd.DataFrame({'Code': ['1','2','1','2,4','3'],'Product id': ['A','B','C', 'D','E']})
</code></pre>
<p><a href="https://i.stack.imgur.com/3UAHN.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/3UAHN.png" alt="enter image description here"/></a></p>
<p>在python编码中,我要求用第三个表列<code>'Required field'</code>中的值替换代码。作为数据帧</p>
<pre class="lang-py prettyprint-override"><code>third= pd.DataFrame({'Code': ['1','2','1','2,4','3'],'Product id': ['A','B','C', 'D','E'],'Required Field':['Apple(1)','Orange(2)','Apple(1)','Orange(2),Graps(4)','Bannana(3)']})
</code></pre>
<p><a href="https://i.stack.imgur.com/jNyu3.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/jNyu3.png" alt="enter image description here"/></a></p>