Given a string consisting of only lowercase characters, create two methods that remove all the consonants or vowels from the given word. They must retain the original order of the characters in the returned strings.

Here the code is given as follows,

Explanation:

Code:  

def filter_vowels(self):

   #create a list of vowels

   vowels=['a','e','i','o','u']

   string=''

   for ch in self:

       #every consonant in given string i.e self is concatinated to string

       if ch not in vowels:

           string=string+ch

   self=string

   return self

def filter_consonants(self):

   #create a list of vowels

   vowels=['a','e','i','o','u']

   string=''

   for ch in self:

       #every vowel in given string i.e self is concatinated to string

       if ch in vowels:

           string=string+ch

   self=string

   return self  

print(filter_vowels('consonants'))

print(filter_consonants('vowels'))