Question

In python dictionary, can function and instances of the class stored as the key value pair? I tried to store function and instances of classes as dictionary value but it won’t work. Are there work-around methods around it or is it that dictionary is not meant for storing the instances of classes and function?

Just for the verification,

# I created a dictionary
 diction = {'god': 'greed', 'hero': 'zero', 'human': 'pain'} 

# and a simple class
class checker:
    def __init__(self):
        pass 

# and created a instance of that class
obTry = checker() 

# and when I try to add this as
diction['new':obTry]

it gave me TypeError.

Just realized that I was the one doing silly mistake, I should have added it like

diction['new'] = obTry

My mistake for not paying attention to syntax.

Answer 1

Both instances and functions can be keys:

In [151]: def foo(): pass

In [152]: {foo:1}
Out[152]: {<function __main__.foo>: 1}

In [153]: {foo:1, Fake(): 2}
Out[153]: {<__main__.Fake at 0x3e04160>: 2, <function __main__.foo>: 1}

In [154]: Fake
Out[154]: __main__.Fake

In [155]: type(Fake)
Out[155]: type