Python代码无法生成XML文件且print(count)无输出，是否与raise语句有关？

是的，无法创建XML文件完全是raise语句引发的问题

原因分析 #

• 执行流程被中断：当sample_function()里的raise Exception(...)触发后，异常会直接终止整个程序的执行流程——函数跳出后，程序不会继续运行后面的if count > 0:代码块，XML生成逻辑根本没机会执行。
• 关于print(count)的疑问：这段代码其实会执行，你看不到输出大概率是因为后续抛出的异常信息覆盖了它的输出，或者终端输出顺序导致它被忽略。

修复方案 #

要让XML文件正常生成，你需要阻止raise语句直接终止程序，有两种常见方式：

方式1：捕获函数抛出的异常

在调用sample_function()时，用try-except块捕获异常，这样程序会继续执行后续代码：

# 替换原有的sample_function()调用代码
try:
    sample_function()
except Exception as e:
    print(f"捕获到异常: {e}")

方式2：移除不必要的raise语句

如果不需要向外抛出这个自定义异常，直接删除raise Exception("An error occurred in the script.")这一行即可，函数执行完成后程序会自然走到XML生成逻辑。

修改后的完整代码示例 #

import os
import xml.etree.ElementTree as ET

error_messages = []
count = 0

def sample_function():
    try:
        result = 10 / 0  
    except Exception as e:
        print(f"An error occurred: {e}")
        error_messages.append(str(e))
        global count
        count += 1
        print(count)
        raise Exception("An error occurred in the script.")

# 捕获异常避免程序终止
try:
    sample_function()
except Exception as e:
    print(f"捕获到异常: {e}")

if count > 0:
    print("Creating XML...")
    root = ET.Element("errors")
    subject = ET.Element("subject")
    subject.text = "DS Interface-v2.2.1 - ERROR: Python Script"
    salutation = ET.Element("salutation")
    salutation.text = "Dear Sir/Madam,"
    body = ET.Element("body")
    logs_path = "${VMPROCESSES}\\TRUMPF\\DS-Interface-v2.2.1\\python\\logs"
    body.text = f"The Process has not been finished successfully. Having some issues regarding the Python script. Logfile can be found at location {logs_path}"
    root.append(subject)
    root.append(salutation)
    root.append(body)
    for error_message in error_messages:
        error_element = ET.Element("error")
        error_element.text = error_message
        root.append(error_element)

    output_directory = "c:/Users/PC/Desktop/gathering for ds/all-try python file/sample"
    
    os.makedirs(output_directory, exist_ok=True)
    
    xml_file_path = os.path.join(output_directory, "sample1_messages.xml")

    tree = ET.ElementTree(root)
    tree.write(xml_file_path)
    print(f"XML file created at {xml_file_path}")

内容的提问来源于stack exchange，提问作者Anjali Sinha