How to take user input and put it in a new array within an array in python?

Question

I'm trying to put user input (just a list of ints) into a list that already exists with one element in it. I'm not sure if it's possible to have a list running off of one element in an already existing list. Might eventually add more elements to already existing list.

Code below:

days = ["Monday"]
days[0] = [int(x) for x in input("Please enter your schedule: ").split()]
print(days)

I expected the results to give me a list within a list, but the actual result was:

days[0] = [int(x) for x in input("Please enter your schedule: ").split()]
ValueError: invalid literal for int() with base 10: '1000,'

• zedfoxus: When you were asked to enter your schedule, what did you type? If you typed commas, don't type that. Just type 1000 2000 3000 or such with spaces.
• khuang: So I did take out the commas from the input but I'm also trying to have Monday included in the array when it's printed out, so I changed days[0] to days[1] but now it's throwing me this error: IndexError: list assignment index out of range I could try appending things, but I'm not sure how this works.
• zedfoxus: What do you want days to contain after you provide information like 1000 2000 3000 at command prompt?
• khuang: I want days to look like ["Monday" [1000, 2000, 3000]] if that's even possible?
• zedfoxus: You will get ["Monday", [1000, 2000, 3000]] - notice the comma after "Monday". That works for you?

Answer 1

You can do this:

days = ["Monday"] 
days.append( [int(x) for x in input("Please enter your schedule: ").split()] )
print(days)

That'll give you ["Monday", [1000, 2000, 3000]] if you provided 1000 2000 3000 from command prompt.

If you do this:

days = ["Monday"]
input_data = input("Please enter your schedule: ")
split_data = input_data.split()
for item in split_data:
 days.append(item)
print(days)

You will get ["Monday", 1000, 2000, 3000]

Or you can use dictionary like so:

days = {}
days["Monday"] = [int(x) for x in input("Please enter your schedule: ").split()]
print(days)

to get {'Monday': [1000, 2000, 3000]}

• khuang: Thank you! I believe the last one is more optimal and closer to what I was looking for.