如何使用python创建用户可修改的XML文档？

Question

我想创建此xml文件并使其创建，以便我可以通过终端对其进行修改，并在以后添加新的“ log”条目。

这是修改后我想要的结果：

<?xml version="1.0" encoding="UTF-8"?>
<?xml-stylesheet type="text/xsl" href="hwlog.xslt"?>
<logroot>
  <log>
    <subject>Maths</subject>
    <timestart>12:00</timestart>
    <timeend>13:00</timeend>
    <timespent>1H</timespent>
    <worktype>Exercises</worktype>
    <workplace>home</workplace>
  </log>
  <log>
    <subject>Geo</subject>
    <timestart>14:00</timestart>
    <timeend>15:00</timeend>
    <timespent>1H</timespent>
    <worktype>Exercises</worktype>
    <workplace>home</workplace>
  </log>
</logroot>

到目前为止，这是我的python脚本：

from lxml import etree

doc = etree.parse('hwlog.xml')

log = etree.Element("log")

subject = etree.SubElement(log, "subject")
timestart = etree.SubElement(log, "timestart")
timeend = etree.SubElement(log, "timeend")
timespent = etree.SubElement(log, "timespent")
worktype = etree.SubElement(log, "worktype")
workplace = etree.SubElement(log, "workplace")

titlesubjectinput = input("Subject : ")
titletimestartinput = input("Time Started : ")
titletimeendinput = input("Time Ended : ")
titletimespentinput = input("Time Spent [time ended - time started] : ")
titleworktypeinput = input("Work Type : ")
titleworkplaceinput = input("Work Place : ")

subject.text = titlesubjectinput
timestart.text = titletimestartinput
timeend.text = titletimeendinput
timespent.text = titletimespentinput
worktype.text = titleworktypeinput
workplace.text = titleworkplaceinput

outfile = open("hwlog.xml", "wb")
doc.write(outfile)

尽管在运行此命令并输入例如（按提示顺序）：Geo，14：00、15：00、1H，Practices时，XML文件的首页显示为：

<?xml-stylesheet type="text/xsl" href="hwlog.xslt"?><logroot>
  <log>
    <subject>Maths</subject>
    <timestart>12:00</timestart>
    <timeend>13:00</timeend>
    <timespent>1H</timespent>
    <worktype>Exercises</worktype>
    <workplace>home</workplace>
  </log>
</logroot>

这显然不是我想要的。 我怎样才能使它像我想要的那样出现（第一个XML示例）？

请原谅我糟糕的编程技巧，我是个“菜鸟”。

Answer 1

您必须附加新的log-Element：

from lxml import etree

doc = etree.parse('hwlog.xml')

log = etree.SubElement("log")
etree.SubElement(log, "subject").text = input("Subject : ")
etree.SubElement(log, "timestart").text = input("Time Started : ")
etree.SubElement(log, "timeend").text = input("Time Ended : ")
etree.SubElement(log, "timespent").text = input("Time Spent [time ended - time started] : ")
etree.SubElement(log, "worktype").text = input("Work Type : ")
etree.SubElement(log, "workplace").text = input("Work Place : ")

doc.getroot().append(log)
with open("hwlog.xml", "wb") as outfile:
    doc.write(outfile)