Function goal: taking a list of numbers & returning a list of each number converted to a string (in one line only!)

Question

Hi everyone! I need help with a function. 
My function, convert, takes a list of numbers as its only parameter. It should return a list of each number converted to a string.
For example, the call convert([1, 2, 3]) should return ["1", "2", "3"].
Here's the tricky thing: the function body must contain only one line of code.
This is what I have so far:
~~~python
def convert(listnums):
 return list("".join([str(x) for x in listnums]))
~~~
When I call the function like this:
~~~python
convert([1, 2, 3, 999])
~~~
.. and I print the result, I see this:
~~~python
['1', '2', '3', '9', '9', '9']
~~~
When it should look like this:
~~~python
['1', '2', '3', '999']
~~~
I am stumped on how I can manipulate the function to convert each number to a string, rather than each element of a number. Can anyone suggest how I might remedy this?
Thanks for reading!

Steven Parker · Accepted Answer

Your list comprehension already does what you want, but then the individual strings get joined into one big one, and then each character is made into a list item.
Just do the comprehension by itself:
python
def convert(list_nums):
  return [str(x) for x in list_nums]

Welcome to the Treehouse Community

Looking to learn something new?

Asher Orr

Asher Orr

Function goal: taking a list of numbers & returning a list of each number converted to a string (in one line only!)

1 Answer

Steven Parker

Steven Parker

Asher Orr

Asher Orr