The Reversed ()() Function in Python

This updated guide examines The Reversed ()() Function in Python and organizes the essential facts, background, and practical takeaways in clear American English.

The syntax of the reversed () function in Python

reversed(seq)

Parameters of the reversed () function:

Reversed () has only one parameter:

• seq: the string you want to reverse.

Strings are objects that support string protocols like __len __ () and __getitem __ () methods. For example: tuple, string, list, range.

Can use reversed () with any object implementing __reverse __ ()

Return value from (reversed)

The reversed () function allows us to process the items in the reverse order of the original string, receive the string and return an iterator with the reversed value of the original string passed.

Example 1: Using reversed () with string, tuple, list and range

print( reversed([44, 11, -90, 55, 3]) ) # v?i string seq_string = 'Python' print(list(reversed(seq_string))) # v?i tuple seq_tuple = ('P', 'y', 't', 'h', 'o', 'n') print(list(reversed(seq_tuple))) # v?i range seq_range = range(5, 9) print(list(reversed(seq_range))) # v?i list seq_list = [1, 2, 4, 3, 5] print(list(reversed(seq_list)))

Running the program, the result is returned:

['n', 'o', 'h', 't', 'y', 'P'] ['n', 'o', 'h', 't', 'y', 'P'] [8, 7, 6, 5] [5, 3, 4, 2, 1]

In the above example, we are converting the result of reversed () to list using the list () function.

Example 2: reversed () with custom objects

class Vowels: vowels = ['a', 'e', 'i', 'o', 'u'] def __reversed__(self): return reversed(self.vowels) v = Vowels() print(list(reversed(v)))

Running the program, the result is returned:

['u', 'o', 'i', 'e', 'a']

See also: Python built-in functions.