How to match any one lowercase vowel in python using Regular Expression?

There are two ways to match any one lowercase vowel in python using Regular Expression. One is the general method and other is using the regular expression.

Using the general method

In the following code, we have matched all the lowercase vowels from the string 'TutRoIals POinT Is A GreAt PlaTfOrm to lEarN '. Here, we did not use regular expression to match. We used the general method to match the lowercase vowels.

Example

The following example is a program which shows the matching of any one lowercase vowel in python using the general method.

string='TutRoIals POinT Is A GreAt PlaTfOrm to lEarN'
lst = []
for i in string:
   if (i=='a' or i=='e' or i=='i' or i=='o' or i=='u'):
      lst.append(i)
print(lst)

Output

On executing the above program, the list of lowercase vowels is printed as output.

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

Using Regular Expression

A regular expression is a group of characters that allows you to use a search pattern to find a string or a set of strings. RegEx is another name for regular expressions. The re module in Python is used to work with regular expressions.

In this article we will match lowercase vowel in python using regular expression. To achieve this, we use r'[a,e,i,o,u]' regular expression. Here, we have used a set of lowercase vowels [a,e,i,o,u] as we need to match them.

Example

In the following code, let us see how to match lowercase vowels using regular expression. We begin by importing regular expression module.

import re

Then, we have used findall() function which is imported from the re module.

import re
string = 'Tutroials Point'
res = re.findall(r'[a,e,i,o,u]', string)
print(res)

The re.findall() function returns a list containing all matches.

Output

On executing the above program, the list of lowercase vowels is printed as output.

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