Python next() Built in Function

The next() function in Python returns the next item from an iterator. An iterator is an object that can be iterated over, such as a list, tuple, string, etc. The next() function can also take a default value as a second argument, which is returned if the iterator has no more items.

Here are some examples of using next() function in Python:

Using next() with a list iterator

# This example creates an iterator from a list and prints its items one by one
mylist = iter(["apple" ,"banana" ,"cherry"])
x = next(mylist)
print(x) # Output: apple
x = next(mylist)
print(x) # Output: banana
x = next(mylist)
print(x) # Output: cherry

Using next() with a default value

# This example returns a default value when the iterator has reached its end
mylist = iter(["apple" ,"banana" ,"cherry"])
while True:
    item = next(mylist ,"end")
    if item == "end":
        break
    print(item)
# Output: apple banana cherry

Using next() with a generator

# This example creates a generator that yields odd numbers and prints them using next()
def odd_numbers():
    n = 1
    while True:
        yield n
        n += 2

gen = odd_numbers()
print(next(gen)) # Output: 1
print(next(gen)) # Output: 3
print(next(gen)) # Output: 5

If you have any questions about this code, you can drop a line in comment.

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