Is it possible to change string into class with some function or command?

Question

As in title. I want to know if is it possible to change string into class and link it with it. Example of what I have in mind:

class Example:
    def __init__(self, name, variable):
        self.n = name
        self.v = variable

tempclass = Example("tempclass", 1)
class1 = Example("class1", 2)
inpt = raw_input()
inpt()
stringtoclass = None

def function1():
    stringtoclass = "%s" % (inpt)
    ## function that change string into link to specific class and gives 
    print stringtoclass.v

tempclass does not represent a class: it is a variable/binding. Example is a class. So what is really desired? — user2864740
– user2864740, Commented Sep 7, 2015 at 5:23
do you want to get the instance of class or the class itself? Can you explain what you want a bit more? — Anand S Kumar
– Anand S Kumar, Commented Sep 7, 2015 at 5:28
@Gunnm You should ask us how to help with what you actually wanna do, not how to write the solution you think you need. What are you using this code for? Edit: In this case. Since you're clearly not sure what you should do — Mahi
– Mahi, Commented Sep 7, 2015 at 5:49

Anand S Kumar · Accepted Answer · 2015-09-07 06:22:50Z

2

I believe you can use dictionary for this. Dictionary are key:value based data structures. You can use the string as the key and the class object as the value. Example -

class Example:
    def __init__(self, name, variable):
        self.n = name
        self.v = variable

obj_dict = {}
obj_dict['tempclass'] = Example("tempclass", 1)
obj_dict['class1'] = Example("class1", 2)

def function1(obj_dict, stringforobj):
    obj = obj_dict.get(stringforobj)
    if obj is not None:
        print obj.v
    else:
        print "Notfound"

inpt = raw_input()
function1(obj_dict, inpt)

answered Sep 7, 2015 at 6:22

Anand S Kumar

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1 Comment

Gunnm Over a year ago

Thank you this is the answer I was looking for.

Sivir · Accepted Answer · 2015-09-07 06:53:43Z

1

Anand S Kumar's answer is better, but if you anyway want to get global variable by it's name, you can use globals() function.

In your example it would be:

class Example:
        def __init__(self, name, variable):
        self.n = name
        self.v = variable

tempclass = Example("tempclass", 1)
class1 = Example("class1", 2)

inpt = raw_input()

stringtoclass = globals()[inpt]
print stringtoclass.v

answered Sep 7, 2015 at 6:53

Sivir

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