How to append user input to an item in a list in Python3

Question

I want user input to be joined to an item in an existing list

I tried formating the string in the list using %s

from random import randint
user_name = input("Name: ")

I want the %s to be the name the user input

my_list = ["Hello %s, nice to meet u",  
        "%s! what a wonderful name",
        "welcome %s"]
for m in my_list:
    print(randint(my_list)% user_name)

my output should be any of the items in the list accompanied by the user input i.e output: #Hello Mike, nice to meet u

where "Mike" is the user input

What do you think randint(my_list) does? You should try choice from the random module instead. — mkrieger1
– mkrieger1, Commented Jan 14, 2019 at 22:43

Tim Klein · Accepted Answer · 2019-01-14 23:00:16Z

3

I am not sure what the logic your code is exhibiting is intended to do, however, here is my interpretation of what you want done.

from random import randint

user_name = input("Name: ")

my_list = ["Hello %s, nice to meet u",
        "%s! what a wonderful name",
        "welcome %s"]

print(choice(my_list) % user_name)

This will print one of the items from the list (at random) with the input appended in the desired location.

Examples:

Name: Tim
Hello Tim, nice to meet u

Name: Pam
Pam! what a wonderful name

Name: Jen
welcome Jen

Edit

Utilize choice instead of randint for clarity/ease/etc.

edited Jan 14, 2019 at 23:00

answered Jan 14, 2019 at 22:46

Tim Klein

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1 Comment

fill_J Over a year ago

Thanks a lot @TimKlein

WayToDoor · Accepted Answer · 2019-01-14 22:44:33Z

2

I'm more used to using long format strings.

from random import choice
user_name = input("Name: ")
my_list = ["Hello {name}, nice to meet u",  
        "{name}! what a wonderful name",
        "welcome {name}"]
for m in my_list:
    print(choice(my_list).format(name=user_name))

But changing your randint to choice should also work in your case.

randint return a random number between min and max
choice randomly choose an element in a list

answered Jan 14, 2019 at 22:44

WayToDoor

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1 Comment

Aaron D. Rodriguez Over a year ago

@fill_J Make sure to select this as the correct answer if it helped you.

Regressor · Accepted Answer · 2019-01-14 22:55:19Z

0

I think other answers are better but I did the same thing by converting the list to string and then again to list.

from random import randint
user_name = input("Name: ")

my_list = ["Hello %s, nice to meet u",  "%s! what a wonderful name", "welcome %s"]

# convert/flatten the list to string
list_to_string =  "::".join(str(x) for x in my_list)

# Replace %s with the username
replaced_string = list_to_string.replace("%s",user_name )

# convert string to list 
string_to_list = replaced_string.split("::")

print(string_to_list)

answered Jan 14, 2019 at 22:55

Regressor

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2 Comments

WayToDoor Over a year ago

What is the OP add a string with :: inside? That sounds like a dangerous method. At least, use list comphrensions to do something like [s.replace("%s", user_name) for s in my_list]

Regressor Over a year ago

:: is just a place holder so that I can convert the string back to list. But, your answer is much better with the computation.

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