can you call a function from a list?

[KEYS]

What i am trying to do:
create a inventory item that uses a function.
The code doesn't work but i will include it as it shows the function i am trying to call on as a list item.

def hall():
    inv=[]
    name=''
    name=input('enter name')
    print('you found an item')
    inv+=trophy(name)
    return name,inv

def show(inv):
        print(inv)

def trophy(name):
  sym='.'
  for i in range(1, len(name)+5, 1):
        print (sym, end="")
  print("\n.."+str(name)+"..")
  for i in range(1, len(name)+5, 1):
        print (sym, end="")

def main():
        name,inv=hall()
        show(inv)
        trophy(name)
main()

[deanhystad]

What are you trying to do? Describe using terms you know and don't worry about translating to Python.

[KEYS]

What are you trying to do? Describe using terms you know and don't worry about translating to Python.

I would like to have a function callable from a list.

I am tasked with having to create an obtainable item that prints a decoration around a users name. The code for that is in the trophy function. If at all possible i am looking for a way to have a list or tuple that holds callable functions. I feel i have to be able to hold the actual function in the list because i cant think of any other way to be able to select and print(see) the item as is through a list.

[Larz60+]

yes example:

def ziggy(name):
    print(f"Hello, I'm {name}")

mylist = ['abc', 'def', ziggy, 'fff']

mylist[2]('Alfie')

Output:
Hello, I'm Alfie

[deanhystad]

In Python a variable is a reference to a thing.

x=5     # x is a reference to the integer object 5
y=print # y is a reference to the print function
y(x)    # This is the same as print(5)

Output:
5

Since a collection is just a variable that can reference multiple things, you can do the same kind of things with a list, tuple or dictionary.

alist = [print, 1]
alist[0](alist[1])

atuple = (print, 2)
atuple[0](atuple[1])

adict = {'func':print, 'value':3}
adict['func'](adict['value'])

Output:
1
2
3

There is nothing special about the print function. Any function can be referenced by a variable or a list or a dictionary. You could make a list of functions if you want. One of my favorite examples of a collection of functions is this simple calculator. This time around I defined the operations as lambdas. I could also use the functions defined in the operator library

calc = {
    '+': lambda a, b: float(a)+float(b),
    '-': lambda a, b: float(a)-float(b),
    '*': lambda a, b: float(a)*float(b),
    '/': lambda a, b: float(a)/float(b)
}

while True:
    equation= input('Enter Equation: ')
    if equation:
        a, op, b = equation.split()
        print(f'{a} {op} {b} = {calc[op](a, b)}')
    else:
        break

Output:
Enter Equation: 3 + 4
3 + 4 = 7.0
Enter Equation: 6 / 3
6 / 3 = 2.0
Enter Equation: 

[KEYS]

Thank you for that reply.
I can see you are able to index a single value from the examples but what about the entire iteration of the function. I may be missing something but i dont see a way to store a function such as below into a list

def trophy():
  name='KEYS'
  sym='.'
  for i in range(1, len(name)+5, 1):
        print (sym, end="")
  print("\n.."+str(name)+"..")
  for i in range(1, len(name)+5, 1):
        print (sym, end="")
trophy()

and later reference it from the list and get the functions entire output.

also what syntax would be used to add the function to the list. I tried list+=function() but that wasnt right.

[buran]

I feel i have to be able to hold the actual function in the list because i cant think of any other way to be able to select and print(see) the item as is through a list.

You can iterate over items in a list and apply a fucntion on each item, no need to have the function in a/the list
e.g.

for item in some_list:
    some_function(item)

or using list comprehension (e.g. if you have a list and want to create new list with elements being the result, i.e. value returned by some function)

[perfringo]

I have no idea why or what but I can address this 'adding to list' / 'getting entire function output' part:

>>> def my_func():
...     print('Hello world')
...
>>> list_ = []
>>> list_.append(my_func)
>>> list_[0]()
Hello world

[deanhystad]

I still don't see where a list comes into play. What makes you think you need a list of functions? Are you basing this on your trophy function using multiple print()'s? Or is it that you have multiple items in the inventory and will need multiple trophy's? I don't understand what you are asking.

If you can help us understand the problem you are trying to solve I am sure we can provide better answers.

[KEYS]

I still don't see where a list comes into play. What makes you think you need a list of functions? Are you basing this on your trophy function using multiple print()'s?

yes in a way.
Picture the function as an obtainable object called trophy. I need to be able to have a list of objects like an inventory that can be called on and shown. I will need to have a few other functions that print out a type of art representing an item and have those items stored in a list so they can later be individually selected to view and or view them all.