python function call with variable

Question

def test():
    print 'test'

def test2():
    print 'test2'

test = {'test':'blabla','test2':'blabla2'}
for key, val in test.items():
    key() # Here i want to call the function with the key name, how can i do so?

possible duplicate of Calling a function of a module from a string with the function's name in Python — cfi
– cfi, Commented Sep 14, 2015 at 9:44

John Kugelman · Accepted Answer · 2010-12-13 16:53:35Z

42

You could use the actual function objects themselves as keys, rather than the names of the functions. Functions are first class objects in Python, so it's cleaner and more elegant to use them directly rather than their names.

test = {test:'blabla', test2:'blabla2'}

for key, val in test.items():
    key()

answered Dec 13, 2010 at 16:53

John Kugelman

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Comments

chrisaycock · Accepted Answer · 2010-12-13 17:00:52Z

9

John has a good solution. Here's another way, using eval():

def test():
        print 'test'

def test2():
        print 'test2'

mydict = {'test':'blabla','test2':'blabla2'}
for key, val in mydict.items():
        eval(key+'()')

Note that I changed the name of the dictionary to prevent a clash with the name of the test() function.

answered Dec 13, 2010 at 17:00

chrisaycock

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4 Comments

Daniel DiPaolo Over a year ago

Oof, not sure why you'd ever use this over the "function objects as keys themselves" method. If anything, you may be introspecting using something like hasattr, but never ever eval

chrisaycock Over a year ago

@Daniel I didn't say it was pretty! :D

martineau Over a year ago

This works, but eval() has a lot of overhead to use it just calling a function. There's other better, way more "Pythonic" ways...

Karl Knechtel Over a year ago

... like, for example, looking up the name in globals() and/or locals() perhaps? :)

3 revs, 2 users 80% · Accepted Answer · 2018-08-07 06:42:49Z

0

def test():
    print 'test'

def test2():
    print 'test2'

assign_list=[test,test2]

for i in assign_list:
    i()

edited Aug 7, 2018 at 6:42

community wiki

3 revs, 2 users 80%
Surya

2 Comments

Surya Over a year ago

in assign_list test,test2 give to direct way i.e [test,test2]

Surya Over a year ago

for i in assign_list: this next line i()

Tangy_leprechaun · Accepted Answer · 2023-02-10 16:06:37Z

-2

def test():
    print 'test'

def test2():
    print 'test2'

func_dict = {
    "test":test,
    "test2":test2
}


test = {'test':'blabla','test2':'blabla2'}
for key, val in test.items():
    func_dict[key]()

edited Feb 10, 2023 at 16:06

answered Feb 10, 2023 at 16:05

Tangy_leprechaun

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