Creating objects in bulk and prining the names of the objects

Question

I wanted to make a 100 objects from the same class and print the names of the objects each time they were created. Something like this:

class Human():
        def __init__(self):
            #print the name of the object

human1 = Human()
human2 = Human()
human3 = Human()
human4 = Human()
human5 = Human()
.......

I was able to come this far:

class Human():
    def __init__(self):
        #print the name of the object

for i in range(1,101):
    #'human' + str(i) = Human()

But I got stuck since in python you cannot define objects as the way I tried to and I couldn’t find a way to print the name of the object. Anything that could help?

Asked By: xemeds

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Source

Answer 1

class Human():
    def __init__(self, name="default name"):
        self.name = name

    def __str__(self):
        return self.name


# print the name of the object

human1 = Human(name="sanjay")
print(human1)

if you pass name parametr then it will print it other wise default name would get printed.

Answered By: Sanjay

Answer 2

You can form variable names out of strings using the exec function:

for i in range(0,101):
  exec("human"+str(i)+"=Human()")
  print("human"+str(i))

But if you want to access those class instances later without manually referencing them, you’ll have to build the same string and put it inside another exec (or eval) function.

A less cumbersome alternative might be to keep all your instances in a data structure like a list or a dict:

human_list = []
human_dict = {}
for i in range(0,101):
  human_list.append(Human())
  human_dict[i] = Human()

And then reference them like

human_list[i]
human_dict[i]

Answered By: Andy Durden

Creating objects in bulk and prining the names of the objects

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