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Python: Reverse only the vowels of a given string

Python Basic - 1: Exercise-71 with Solution

Write a Python program to reverse only the vowels of a given string.

Sample Solution:

Python Code:

def reverse_vowels(str1):
	vowels = ""
	for char in str1:
		if char in "aeiouAEIOU":
			vowels += char
	result_string = ""
	for char in str1:
		if char in "aeiouAEIOU":
			result_string += vowels[-1]
			vowels = vowels[:-1]
		else:
			result_string += char
	return result_string
print(reverse_vowels("w3resource"))
print(reverse_vowels("Python"))
print(reverse_vowels("Perl"))
print(reverse_vowels("USA"))

Sample Output:

w3resuorce
Python
Perl
ASU

Pictorial Presentation:

Python: Reverse only the vowels of a given string
Python: Reverse only the vowels of a given string
Python: Reverse only the vowels of a given string

Flowchart:

Flowchart: Python - Reverse only the vowels of a given string

Python Code Editor:

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Previous: Write a Python program to find the longest common prefix string amongst an given array of strings. Return false If there is no common prefix.
Next: Write a Python program to check whether a given integer is a palindrome or not.

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Python: Tips of the Day

What is the difference between Python's list methods append and extend?

append: Appends object at the end.

x = [1, 2, 3]
x.append([4, 5])
print (x)

Output:

[1, 2, 3, [4, 5]]

extend: Extends list by appending elements from the iterable.

x = [1, 2, 3]
x.extend([4, 5])
print (x)

Output:

[1, 2, 3, 4, 5]

Ref: https://bit.ly/2AZ6ZFq