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Python 3: An interactive deep dive

Instantiating Classes

Understand how to create instances of classes in Python 3 by calling the class like a function with appropriate arguments. Learn to assign instances to variables and explore class metadata and docstrings within each object. This lesson clarifies the straightforward process of instantiating classes without using a separate operator.

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Instantiating classes in Python is straightforward. To instantiate a class, simply call the class as if it were a function, passing the arguments that the __init__() method requires. The return value will be the newly created object.

Python 3.5
import fibonacci2
fib = fibonacci2.Fib(100)          #①
print (fib)                        #②
#<fibonacci2.Fib object at 0x7f7594e75ba8>
print (fib.__class__)              #③
#<class 'fibonacci2.Fib'>
print (fib.__doc__ )               #④
#iterator that yields numbers in the Fibonacci sequence

① You are creating ...