如何将for循环的输出保存到Python中的列表？

Question

I have a for loop that generates strings associated with the number in the numbers list by searching through an XML file.

tree = parse("demo.xml")
root = tree.getroot()

fields = {int(child.attrib["number"]): child.attrib["name"] for child in root}

numbers [1, 4, 5, 8, 9, 45, 78]

for number in numbers:
    print(fields.get(number, f"{number} does not exist in XML"))

so the output is like:

Account
Name
ID
Time

I want to save this output to a list, and separate each text by a comma, so it should save this to a list that should look like:

myList: [Account, Name, ID, Time]

How can I do this?

Answer 1

您可以使用列表理解

myList = [fields.get(number, f"{number} does not exist in XML") for number in numbers]

Answer 2

Create a new empty list before starting the loop and add elements to it inside the loop body.

Replace

for number in numbers:
   print(fields.get(number, f"{number} does not exist in XML"))

with

myList = []
for number in numbers:
    myList.append(fields.get(number, f"{number} does not exist in XML")))

You can then use myList to get the output in the format you like. From your question, it seems you may need one of these

print("myList:", myList)
print("myList: [", ",".join(myList), "]")