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Python is it possible to call multiple functions from the same line depending on previous events?

R

richodude

New Coder
Python: 
import random

a = [1,2,3]
random.shuffle(a)

print(a)
print(a[0])

def fun1():
    print("I'm function 1!")
    
def fun2():
    print("I'm function 2!")
    
def fun3():
    print("I'm function 3!")
    
fun(a[0])

This is a simplified version of a deck of cards hence the odd random selection. Is there a way to modify the code above in order to get my expected outcome? (if a == 2 then fun2() would be called)

Python: 
def deal():
    global p_hand
    global d_hand
    p_hand = deck[0] + deck[1]
    d_hand = deck[2] + deck[3]
    print("player's" ,deck[0],deck[1], "vs dealer's" ,deck[2] )
    if d_hand == 21:
        elim()
    if deck[2] == 2:
        d2()
    if deck[2] == 3:
        d3()
    if deck[2] == 4:
        d4()
    if deck[2] == 5:
        d5()
    if deck[2] == 6:
        d6()
    if deck[2] == 7:
        d7()
    if deck[2] == 8:
        d8()
    if deck[2] == 9:
        d9()
    if deck[2] == 10:
        d10()
    if deck[2] == 11:
        d11()

This is my current solution which seems quite long and inelegant
 
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Could try using a dict. Would get rid of all the ifs.
Maybe something like this.

Python: 
from random import randint

# Define the functions
def func1():
    return 'This is function 1'

def func2():
    return 'This is function 2'

def func3():
    return 'This is function 3'

# Create a dict - numbers are key functions are values
functions = {
    1: func1(),
    2: func2(),
    3: func3()
}

# Create a random number from 1 to 4. If 4 is picked the else will fire.
number = randint(1, 4)

# Check the dict keys for the number and print
if number in functions.keys():
    print(functions[number])
else:
    print('That number does not exist in the dict.')

output

Code: 
This is function 1

On a side note: It is generally bad practice to put globals in a function. You should pass them as arguments or some other form to use them.
 
Last edited:
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You can also do this:
Python: 
from random import randint

# Define the functions
def func_1():
    return 'This is function 1'

def func_2():
    return 'This is function 2'

def func_3():
    return 'This is function 3'

# Create a random number from 1 to 4. If 4 is picked the else will fire.
num = randint(1, 4)

# Check the locals dict for the number and print
if f"func_{num}" in locals():
    print(locals()[f"func_{num}"]())
else:
    print('That number does not exist.')
 
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What you are asking for is dynamic functions. See this article for a number of ways to dynamically call a function. The first option is the easiest (if perhaps not the best in terms of security). Using this method you could replace your series of if statements on deck[2] by this code

Python: 
func = globals()["d"+str(deck[2])]
func()

which will dynamically call one of d2..d11 according to the value of deck[2].

But do you really need 10 different functions to handle the different values of deck[2] ? I have a hunch these functions will look very much alike, with a lot of redundancy between them. Would it not be better to have just one function with the number 2..11 as parameter ?
 
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Play Snayk 3+, higher dimensional snake game?
cbreemer said:
What you are asking for is dynamic functions. See this article for a number of ways to dynamically call a function. The first option is the easiest (if perhaps not the best in terms of security). Using this method you could replace your series of if statements on deck[2] by this code

Python: 
func = globals()["d"+str(deck[2])]
func()

which will dynamically call one of d2..d11 according to the value of deck[2].

But do you really need 10 different functions to handle the different values of deck[2] ? I have a hunch these functions will look very much alike, with a lot of redundancy between them. Would it not be better to have just one function with the number 2..11 as parameter ?
Click to expand...
Thanks! ill check that out. In my case d2() is the function that gets called when the dealer's upcard is a 2 (blackjack game) so I figured it's be much simpler to have 2-11 functions since strategy is determined by the dealer's upcard. I could make it all 1 function but it'd get very big and confusing quickly. If that would make my program considerably faster, then Ill have to figure it out. I attached the WIP below if you wanted to check it out
 

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richodude said:
Thanks! ill check that out. In my case d2() is the function that gets called when the dealer's upcard is a 2 (blackjack game) so I figured it's be much simpler to have 2-11 functions since strategy is determined by the dealer's upcard. I could make it all 1 function but it'd get very big and confusing quickly. If that would make my program considerably faster, then Ill have to figure it out. I attached the WIP below if you wanted to check it out
Click to expand...
Ok, if you expect the functions being significantly different then your approach is the way to go.
 
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