参考熊猫数据框替换XML中的元素

Question

我正在使用lxml读取带有以下内容的xml文件：

tree = etree.parse(r'C:\Users\xxx\Desktop\misc work\xmledit\SalesTransactionCustom.xml')

并获得一个类似的xml文件：

<?xml version="1.0" encoding="UTF-8"?>
<ProcessSalesTransactionCustom xmlns="http://schema.xxxx.com/xxxxx/2" releaseID="9.2">
  <ApplicationArea>
    <Sender>
      <LogicalID>xxxxxx.file.syncxxxxx5salesinvoice</LogicalID>
      <ComponentID>External</ComponentID>
      <ConfirmationCode>OnError</ConfirmationCode>
    </Sender>
    <CreationDateTime>2020-04-16T14:50:26.976Z</CreationDateTime>
    <BODID>xxxx-nid:xxxxx:1001::Default_1001#320000:?SalesTransactionCustom&amp;verb=Process</BODID>
  </ApplicationArea>
  <DataArea>
    <Process>
      <TenantID>infor</TenantID>
      <AccountingEntityID>4710</AccountingEntityID>
      <LocationID>S_4710</LocationID>
      <ActionCriteria>
        <ActionExpression actionCode="Add"/>
      </ActionCriteria>
    </Process>
    <SalesTransactionCustom>
      <FinancialBatch>
        <TransactionDate>2019-09-27T00:00:00</TransactionDate>
        <BatchReference>KUKS_20190928052427</BatchReference>
      </FinancialBatch>
      <TransactionHeader>
        <TransactionType>HEI</TransactionType>
        <SalesInvoice>
          <Invoice>19001160</Invoice>
          <BusinessPartner>417B00</BusinessPartner>
          <DocumentDate>2019-09-27T00:00:00</DocumentDate>
          <DueDate>2019-11-20T00:00:00</DueDate>
          <Amount>152248.80</Amount>
          <Currency>EUR</Currency>
          <TaxCountry>DK</TaxCountry>
          <TaxCode>BESIT</TaxCode>
          <NonFinalizedTransaction>
            <TransactionReference>417B00 PC210LCI-11</TransactionReference>
            <LedgerAccount>50000400</LedgerAccount>
            <Dimension1>100</Dimension1>
            <Dimension2>KUK</Dimension2>
            <Dimension3/>
            <Dimension4/>
            <Dimension5/>
            <Dimension6/>
            <Dimension7/>
            <Dimension8/>
            <TaxAmount>0.00</TaxAmount>
            <DebitCreditFlag>credit</DebitCreditFlag>
            <Amount>152248.80</Amount>
          </NonFinalizedTransaction>
        </SalesInvoice>
      </TransactionHeader>
      <TransactionHeader>
        <TransactionType>HEI</TransactionType>
        <SalesInvoice>
          <Invoice>19001161</Invoice>
          <BusinessPartner>412600</BusinessPartner>
          <DocumentDate>2019-09-27T00:00:00</DocumentDate>
          <DueDate>2019-11-20T00:00:00</DueDate>
          <Amount>113848.17</Amount>
          <Currency>EUR</Currency>
          <TaxCountry>AT</TaxCountry>
          <TaxCode>GBSI</TaxCode>
          <NonFinalizedTransaction>
            <TransactionReference>412600 PC210NLC-11</TransactionReference>
            <LedgerAccount>50000400</LedgerAccount>
            <Dimension1>100</Dimension1>
            <Dimension2>KUK</Dimension2>
            <Dimension3/>
            <Dimension4/>
            <Dimension5/>
            <Dimension6/>
            <Dimension7/>
            <Dimension8/>
            <TaxAmount>0.00</TaxAmount>
            <DebitCreditFlag>credit</DebitCreditFlag>
            <Amount>113848.17</Amount>
          </NonFinalizedTransaction>
        </SalesInvoice>
      </TransactionHeader>
    </SalesTransactionCustom>
  </DataArea>
</ProcessSalesTransactionCustom>

我有一个类似pandas的数据框（这里第一行是列名：]

Tag             Old Value   New Value
BusinessPartner 417B00      BPE000104
BusinessPartner 412600      BPE000153
LedgerAccount   50000400    108092200

我想参考此熊猫数据框替换xml中元素的属性。我希望能够找到标记和旧值的组合，并将属性替换为新值。我该如何使用lxml和pandas？

提前谢谢您

Answer 1

为什么不只将XML读取为字符串并执行str.replace？

tag = df.Tag; old = df.Old; new = df.New

for i in range(len(tag)):
   _str = _str.replace("<"+tag[i]+">"+old[i]+"</"+tag[i]+">","<"+tag[i]+">"+new[i]+"</"+tag[i]+">")