My intersection() method returns an error-CodePudding

I have tried to make a piece of code that shows me only the common values of user input as compared to a set list. I continue to get the error:

TypeError: unhashable type: 'list'

Here's what I've done:

    main_List = ["name", "job", "backstory", "all"]
    provided_List = []

 def main()
    resp = input("Do you need a name, job, backstory, or all?")
    provided_List.append(resp.split())
    update_Set = provided_List.intersection(main_List)
    print(update_Set)

 main()

Essentially, I'm trying to ignore everything but key words the user inputs. As far as I can tell I am doing everything exactly like the examples but it still isn't coming out the way I want. I'm not sure what I'm missing here.

CodePudding user response：

You are attempting to use set methods on list objects. You need to cast both main_list and provided_list as set objects:

main_options = {"name", "job", "backstory", "all"}
prompt = "Select any of name, job, backstory, or all: "
resp = main_options & set(input(prompt).split())

Usage:

Select any of name, job, backstory, or all: name
# resp: {'name'}

Select any of name, job, backstory, or all:
# resp: set()

Select any of name, job, backstory, or all: name backstory job
# resp: {'backstory', 'job', 'name'}