Am I missing something?

micro:bit
1

Am I being “not smart”.

why is the split function not working

It just returns an empty list.

1 Like
2

It looks like it’s giving an error from a place you can’t control, since you’re not using “length” in your program.

Cannot read property ‘length’ of undefined
at (main.ts:1:1)

3

It works in JavaScript…

4

Yes I know but it should work in python
.split(" ") works the same in both languages,
but in python for some reason it is returning []
which the obviously
test[1]
returns an error
can this be fixed?

5

Yeah, it should. If it still doesn’t work on Monday, I’ll check in with the team.

6

The split is still not working. What’s wrong with using it?

7

I don’t think Python currently supports split() on strings. I’ve opened an “issue” on GitHub to report the error. See here: https://github.com/microsoft/pxt/issues/8752

In the meantime, you could use a function to split strings by a single character. Here’s an example (I’ve tested it in the simulator, but not on a micro:bit):

words = "this is a test"

def simpleSplit(string, char):
    array = []
    current = ""
    for c in string:
        if c==char: 
            array.push(current)
            current = ""
        else:
            current = current + c 
    if current != "":
        array.push(current)
    return array

splitBySpace = simpleSplit(words, " ")
serial.write_number(len(splitBySpace))
serial.write_line("")
for w in splitBySpace:
    serial.write_line(w)
8

The GitHub issue has been closed. It looks like split() in Python may now work: https://github.com/microsoft/pxt/issues/8752#issuecomment-1198700037 .