How to convert a str to a single element list in python

Question

I have a str variable: var_1 = \"hello\" , and I want to convert it to a single element list, I try this:

>>>         


        

Answer 1

It can be useful to add a check before doing so, as such:

if not isinstance(var_1, list): var_1 = [var_1]

A use case for this code is in functions that can take either a string or a list of strings and want the functions to handle that silently. E.g.:

def dataframe_key_columns(dataframe, keys):
    if not isinstance(keys, list): keys = [keys]
    return [dataframe[key] for keys in keys]

Answer 2

Just do the following:

var_1 = ['hello']

Answer 3

Does var1 = [var1] accomplish what you're looking for?

Answer 4

Just put square brackets

>>> var_1 = "hello"
>>> [var_1]
['hello']

Answer 5

Let me provide you a much easier and authentic way to do it.

s='hello' L=[] L.append(s)

You will get a list with 'hello' as its element. And you can use the list L anyway you like.