Can a function be called by user input?

Question

I want to create an interactive python app allowing the user to create commands and play a song or something along those lines so I was wondering if functions can be called whith the user input so far it hasent worked i used this coad
def lool():
print ("i like fish")

input ()
so if the user typed lool it would print "i like fish"

Answer 1

def lool():
print ("i like fish")

user=input ()
if user=='lool':
lool()

Answer 2

Here you go:

def lool():
print("i like fish")

x = input()
x = x + "()"

exec(x)

The exec() function is useful when you want to treat strings like executable code. Not sure if it's the most elegant solution but it works.

Answer 3

I guess you can switch depending on the input and in the cases do the different functions

Answer 4

exec really is a security risk... really a bad idea to use it without proper thought beforehand

Answer 5

What you are looking for is introspection. Look for function getattr. in python docs.
Introspection is about self information included in classes.

Here is an example:

class Functions:
@classmethod
def lol(cls):
print("I like fish")
@classmethod
def dosomething(cls,something):
print(something)

def process(functionName, args):
try:
f = getattr(Functions, functionName)
except AttributeError:
print ("Function '{0}' do not exist".format(functionName))
else:
try:
if (args == ""):
f()
else:
f(args)
except TypeError:
print ("Wrong argument '{0}' to function {1}".format(args, functionName))

while True:
print()
fname = input("Print function name: " )
fargs = input("Print function args: " )
print()
if (fname == ''):
print ("Exit")
break;
else:
process(fname, fargs)

To add more options you only need to add class methods to Functions class.

Answer 6

yes if you use a dictionary like that :
d={"lool":lol} #I am not sure about the syntax
d[input()]()

Answer 7

thanks for answering my question it helps allot

Answer 8

*cough* Python is an _interpreter_ :)
=====================
def lool():
print('i like fish')
eval(input('Type lool!') + "()")
=====================
Output:
Type lool! (you type function name)
i like fish

Security issue's similar to exec() : trusting user input with NO filter...except it's for one statement (exec's for a batch).

Answer 9

you can make an if statement so if user inputs "this", it will call "that".

Answer 10

Everything is possible if you are creative enough.

Answer 11

def lool() :
print("i like fish")
inp = input ("Please enter a callable keyword :")
if inp == "lool" :
lool()
else :
print ("oohhh , you do not like fish")
#sorry for bad english
#add and subscribe 😁:3

Answer 12

def a():
print ("a" *10)

def b():
print ("b" *10)

def c():
print ("c" *10)

x = input('command:')

if x in ['a', 'b', 'c']:
exec(x+'()')
else:
print ('not defined')

Answer 13

of course it can be called by the user

Answer 14

a=input('If you type \'lool\', I will tell you something.')
if a=='lool': print('I like fish')
else: print('Good bye!')
#I don't know this is right or not.

Answer 15

in python 3 you could use

X = input ("are you happy or sad")
if X == "happy":
print ("OK")

your input would be happy.

Answer 16

can't be a function like that, but u can do this:

X = input("are you happy or sad")
if X == "happy":
print ("that is good")

Answer 17

asds yu, your program does work

Answer 18

def lool():
print("I like fish")

user_input = input()

temp = globals().copy()
temp.update(locals())
user_input = temp.get(user_input)

user_input()

Answer 19

said=input()
if said=='lool':
print("I like fish\n")

Answer 20

yes definately
def printf(inp):
print(inp)
prinf("lets code")