如何从Python调用使用ElementTree的Python脚本？

Question

我正在通过使C＃在外壳上运行来从C＃调用python脚本。 python代码更新XML。从外部从python shell运行时，它工作正常。但是，当通过c＃运行时，它确实会在脚本运行时进行更新，因为我可以通过打印语句看到XML中发生的更改，但是当代码完成后，XML文件仍然是完整的。

我从xml，更新前和更新后打印了值。并进行更新。但是，当我在编辑器中打开xml文件时，没有任何更改。该如何解决？

C＃：

    private static void doPython()
    {
        string fileName =@"I:\Python\XMLParser\BW_Config_ConfigureCode.py";
        Process p = new Process();
        p.StartInfo = new ProcessStartInfo(@"C:\Users\suddin\AppData\Local\Programs\Python\Python37-32\python.exe", fileName)
        {
            RedirectStandardOutput = true,
            UseShellExecute = false,
            CreateNoWindow = true
        };
        p.Start();

        string output = p.StandardOutput.ReadToEnd();
        p.WaitForExit();

        Console.WriteLine(output);

        Console.ReadLine();
    }

Python：     将xml.etree.ElementTree导入为ET

# Welcome! In this file, we configure all the tags of BW_Config.xml, which are there in the file BW_Config_Installer_Configurations.xml
# We parse 2 xml files in this code.
# First is the BW_Config.xml which we need to configure
# Second is the BW_Config_Installer_Configurtion.xml which contains the information about which tags are to be configured in the BW_Config.xml

BW_Config_tree = ET.parse('I:\Python\XMLParser\BW_Config_for_parsing_practice.xml')  # parsed BW_Config.xml
BW_Config_root = BW_Config_tree.getroot()

print(BW_Config_root.tag)

# parsed BW_Config_Installer_Configurations.xml
installer_config_tree =ET.parse('I:\Python\XMLParser\BW_Config_Installer_Configurations.xml')
installer_config_root = installer_config_tree.getroot()

print(installer_config_root.tag)

i = 0
# This loop will traverse all the tags which need to be cofigured, one by one
for configurable_tag in installer_config_root.findall("./BW_Config/"):
    # This variable will contain the name of the tag to be configured in each iteration
    configurable_tagname = configurable_tag.tag
    # This variable will contain the path of the tag inside BW_Config.xml, in each iteration
    configurable_tagpath = configurable_tag.attrib["xpath"]
    # This variable will contain the data about what is to be configure in the tag, in each iteration
    configurable_tagattribute = configurable_tag.attrib["property"]
    # This variable will be set to "yes", if the respective tag is to be changed, else "no"
    configurable_tagchoice = configurable_tag.attrib["configurable"]
    # This variable will contain the new value for the respective tag
    configurable_tagnewvalue = configurable_tag.attrib["value"]
    i = i + 1  # It is used just to maintain the number of iterations and for user friendly console display
    # Printing which tag we will be dealing with in this iteration
    print(i, configurable_tagname)
    print("\n")
    if configurable_tagchoice=="yes":
        if configurable_tagattribute != "text":
            for elem in BW_Config_root.findall(configurable_tagpath):
                for name, value in elem.attrib.items():
                    print(name, ":", value)
                elem.attrib[configurable_tagattribute] = configurable_tagnewvalue
                BW_Config_tree.write("BW_Config_for_parsing_practice.xml")
                print("-------\nUpdated\n-------")
                for name, value in elem.attrib.items():
                    print(name, ":", value)
                print("\n")
        else:
            print("Text is to be configured")
            for elem in BW_Config_root.findall(configurable_tagpath):
                if len(elem.attrib) == 0:
                    print("There are no attributes to the tag "+elem.tag)
                    print("Text inside the tag is \""+str(elem.text)+"\"")
                else:
                    for name, value in elem.attrib.items():
                        print(name, ":", value)
                elem.text=configurable_tagnewvalue
                BW_Config_tree.write("BW_Config_for_parsing_practice.xml")
                print("-------\nUpdated\n-------")
                print("New Text inside tag: "+elem.text)
    else:
            print("To Configure, set the attribute \"configurable\" to \"yes\"")

我收到此错误：