Python reversed()

The reversed() function takes in an iterable object, such as a list, string, or a tuple and returns a reversed iterator object.

Syntax

reversed(iterator)

Example 1

Because the reversed() function returns an iterator object, in order to access the content, it is necessary to iterate over the object when printing:

counting = ["one", "two", "three"]

blast_off = reversed(counting)

for num in blast_off:
  print(num, end=" ")

# Output: three two one

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Example 2

The example below reverses the elements of a list.

Note: To simply reverse an existing list rather than return an iterator object, Python has a list.reverse() method:

counting = ["one", "two", "three"]

blast_off = reversed(counting)

print(blast_off) # Output: <list_reverseiterator object at 0x7ff4f6a1dfa0>

counting.reverse()

print(counting) # Output: ['three', 'two', 'one']

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Example 3

Because strings are also iterable objects, reversed() can also be used on strings.

new = reversed("stressed")

for letter in new:
  print(letter, end="")

# Output: desserts

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Codebyte Example

Tuples are iterable objects too, hence reversed() can be used on tuples as well.

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