How to add User Input (String) into a list?-CodePudding

For some reason any user input isn't appended to the empty list. I'm not sure where I'm going wrong. This is an example to a larger issue I'm having. Any help would be appreciated. Thanks

list = []

print("Who wrote War and Peace?: ")
book1 = input()

for i in list:
    list.append(book1)
    print(f"Author: "   i)

CodePudding user response：

I see that you are trying to add an item to an empty list and using a for loop to access it but you are doing the opposite.

Another thing is you are using a formatted string to print the author's name. Remember when doing a formatted string, you use {} and just put the variable inside it instead of doing variable

my_list = []

print("Who wrote War and Peace?: ")
book1 = input('')

my_list.append(book1)

for i in my_list:
    print(f"Author: {i}")

CodePudding user response：

When you print out the value of list, Python interprets this as the list data-types. You can fix your issue by changing the variable name to something like l or my_list.

EDIT: On further notice, you are looping for every item in the list, but the list is empty, so the for-loop won't run.

CodePudding user response：

Welcome to StackOverFlow!

From my reproduction, there is no "i" value in list (its empty). Therefor the for loop is not triggering, nothing to loop over.

Reproduction:

user_input=(input("\nWhat is the airspeed velocity of a (European) unladen swallow?: "))
a=False
list = []
for i in list:
    a=True #if For Loop is triggered a is True and prints pass
    list.append(user_input)
    print(list)
if a is not True: #if For loop is not triggered then fail will be printed
    print('fail')
else:
    print('pass')

Results

What is the airspeed velocity of a (European) unladen swallow?: 24 mph
fail

In order to append to the list. Remove the for loop for the initial input.

user_input1=(input("\nWhat is the airspeed velocity of a (European) unladen swallow?: \n"))
list_ = []
list_.append(user_input1)

user_input2=(input("We are the Knights who say?: \n"))
for i in range(len(list_)):
    list_.append(user_input2)
    print(list_)

Results

What is the airspeed velocity of a (European) unladen swallow?: 
24 mph
We are the Knights who say?: 
Ni
['24 mph', 'Ni']

As Neurotricity said dont use list as a variable for a list (I usually put a "_" at the end). (see their comment for more detail)

Cheers!