Python解析XML数据为字符串而非整数及运行异常问题咨询

Hey Ericka, let's break down your XML parsing issues one by one to get everything sorted out!

First, let's look at your XML structure:

90 7 7

When you run myroot = file_name.getroot(), myroot refers to the root <settings> element. Your code uses for i in myroot[0] — but myroot[0] is the first <standard> element, not the list of all <standard> elements.

The <standard> element only contains text content (like "90") and no child elements. So when you loop over myroot[0], you're trying to iterate over child elements of that single <standard> tag, which don't exist. That's why you get no output.

To fix this, iterate over the direct children of myroot (which are the three <standard> elements):

import xml.etree.ElementTree as ET

file_name = ET.parse('imports.xml')
myroot = file_name.getroot()
# Iterate over all <standard> elements under <settings>
for standard in myroot:
    print(standard.text)  # This will output 90, 7, 7

Here's the key thing about XML: it doesn't have built-in data types. Every piece of text inside an element is treated as a string by default, regardless of what it looks like (numbers, dates, etc.).

Python's xml.etree.ElementTree library doesn't automatically convert these strings to integers or other types — it just returns the raw text content. If you need integer values, you'll have to convert them manually using int():

for standard in myroot:
    value_str = standard.text
    value_int = int(value_str)  # Convert string to integer
    print(f"String value: {value_str}, Integer value: {value_int}")

Since your code worked one day but broke the next, here are the most likely culprits:

• Missing import statement: If you rewrote the code and forgot to add import xml.etree.ElementTree as ET, Python won't recognize ET and throw an undefined error.
• File path issue: The imports.xml file might have moved, or your script's working directory changed (e.g., you opened the script from a different folder the next day). ET.parse() looks for the file in the current working directory by default.
• Typos in code: A small mistake like misspelling getroot() as getRoot() (case matters in Python) or using an incorrect variable name could trigger an undefined error.

内容的提问来源于stack exchange，提问作者Ericka