How to save output from for loop to a List in Python?

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?

MyList format isn't right for string, I mean the items in the list should have quotes around them too — luchad95
– luchad95, Commented Sep 30, 2020 at 10:44

Chandral · Accepted Answer · 2020-09-30 10:46:03Z

1

You can use list comprehension

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

answered Sep 30, 2020 at 10:46

Chandral

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Varun Vora · Accepted Answer · 2020-09-30 10:53:25Z

1

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), "]")

answered Sep 30, 2020 at 10:53

Varun Vora

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