What is the use of the "next" method in Python?

The **next** method in Python is used to retrieve the next item from an iterator. It is typically used in combination with the **iter** method. The **next** method is called automatically by Python's for loop, but can also be called explicitly to retrieve the next item from an iterator.

The **next** method takes an optional argument, which is used as the default value when there are no more items in the iterator. If there are no more items and no default value is provided, a **StopIteration** exception is raised.

Here is an example of using the **next** method with a built-in Python iterator, the **range** function:

# Create an iterator from the range function
my_iterator = iter(range(3))

# Retrieve the first item from the iterator
first_item = next(my_iterator)
print(first_item)  # Output: 0

# Retrieve the second item from the iterator
second_item = next(my_iterator)
print(second_item)  # Output: 1

# Retrieve the third item from the iterator
third_item = next(my_iterator)
print(third_item)  # Output: 2

# Try to retrieve another item from the iterator
# This will raise a StopIteration exception
fourth_item = next(my_iterator)
print(fourth_item)  # Raises StopIteration exception

Related Questions You Might Be Interested