How to count number of instances of a class in Python?
Last Updated :
29 Dec, 2020
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Instances of a class mean the objects created for a particular class. A single class can have multiple objects of it. Here, we will find the count of the number of instances of a class in Python.
Approach:
- Whenever an object is created, the constructor of that particular class is called.
- Constructor is a function whose name is the same as that of class name and it doesn't have any return type. A constructor is used to initialize the variables of a class.
- Whenever a constructor is called which means a new object is created, we just have to increment a counter that will keep track of the no. of objects that particular class has.
Below is the implementation:
# code
class geeks:
# this is used to print the number
# of instances of a class
counter = 0
# constructor of geeks class
def __init__(self):
# increment
geeks.counter += 1
# object or instance of geeks class
g1 = geeks()
g2 = geeks()
g3 = geeks()
print(geeks.counter)
Output:
3
