Question

我有以下问题：我有一个xml文件，我通过xml.etree.ElementTree解析它具有以下结构

<e3r>
<moreData>false</moreData>
<data>
<CashDividend Isin="IE00BYM8JD58" AdjustmentFactor="" Adjustment_Date="" Adjustment_Factor=""/>
<CashDividend Isin="IE00BZ163G84" AdjustmentFactor="" Adjustment_Date="" Adjustment_Factor="" Amount_Status=""/>
<CashDividend Isin="IE00BZ163H91" AdjustmentFactor="" Adjustment_Date="" Adjustment_Factor=""/>
<CashDividend Isin="IE00BZ163M45 " AdjustmentFactor="" Adjustment_Date="" Adjustment_Factor="" />
</data>
</e3r>

我通过API获取标签AdjustmentFactor的一些数据（我使用Isin获取数据），我想要实现的是将我用API获得的数据添加到AdjustmentFactor。（与伊辛有关）。我无论如何都无法解决这个问题。

这就是我获得每个ISIN的方式：

isins = []

 for child in tree.getroot().getchildren()[1].getchildren():
            isins.append(child.attrib['Isin'])

 for isin in isins:
    print isin

但我不知道如何使用列表isins中存储的数据向AdjustmentFactor添加数据。

有人可以协助吗？

Answer 1

问题中没有明确说明，但如果我理解正确，您希望更新AdjustmentFactor属性等于某个值的元素的Isin属性值。您可以使用类似.//element_name[@attribute_name='attribute_value']的XPath表达式按属性值查找元素。

工作演示示例：

from xml.etree import ElementTree as et

raw = '''<e3r>
<moreData>false</moreData>
<data>
<CashDividend Isin="IE00BYM8JD58" AdjustmentFactor="" Adjustment_Date="" Adjustment_Factor=""/>
<CashDividend Isin="IE00BZ163G84" AdjustmentFactor="" Adjustment_Date="" Adjustment_Factor="" Amount_Status=""/>
<CashDividend Isin="IE00BZ163H91" AdjustmentFactor="" Adjustment_Date="" Adjustment_Factor=""/>
<CashDividend Isin="IE00BZ163M45 " AdjustmentFactor="" Adjustment_Date="" Adjustment_Factor="" />
</data>
</e3r>'''

root = et.fromstring(raw)
isin = "IE00BYM8JD58"
adjustment_factor = "FOO"
element = root.find(".//CashDividend[@Isin='%s']" % isin)
element.set("AdjustmentFactor", adjustment_factor)

print et.tostring(root)

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输出

<e3r>
<moreData>false</moreData>
<data>
<CashDividend AdjustmentFactor="FOO" Adjustment_Date="" Adjustment_Factor="" Isin="IE00BYM8JD58" />
<CashDividend AdjustmentFactor="" Adjustment_Date="" Adjustment_Factor="" Amount_Status="" Isin="IE00BZ163G84" />
<CashDividend AdjustmentFactor="" Adjustment_Date="" Adjustment_Factor="" Isin="IE00BZ163H91" />
<CashDividend AdjustmentFactor="" Adjustment_Date="" Adjustment_Factor="" Isin="IE00BZ163M45 " />
</data>
</e3r>

为标记XML Python添加值

1 个答案: