Python – Index Frequency Alphabet List

Last Updated : 11 Sep, 2021

Create a String list with each character repeated as much as its position number.

Method #1 : Using ascii_lowercase + ord() + loop

In this, task of getting index is done using ord(), and ascii lowercase() is used for extracting alphabets. Loop is used to perform task for each letter.

Python3

# Python3 code to demonstrate working of
# Index Frequency Alphabet List
# Using ascii_lowercase + ord() + loop
from string import ascii_lowercase
 
# extracting start index
strt_idx = ord('a') - 1
 
res = []
for ele in ascii_lowercase:
     
    # multiplying Frequency
    res.append(ele * (ord(ele) - strt_idx))
 
# printing result
print("The constructed list : " + str(res))

Output

The constructed list : ['a', 'bb', 'ccc', 'dddd', 'eeeee', 'ffffff', 'ggggggg', 'hhhhhhhh', 'iiiiiiiii', 'jjjjjjjjjj', 'kkkkkkkkkkk', 'llllllllllll', 'mmmmmmmmmmmmm', 'nnnnnnnnnnnnnn', 'ooooooooooooooo', 'pppppppppppppppp', 'qqqqqqqqqqqqqqqqq', 'rrrrrrrrrrrrrrrrrr', 'sssssssssssssssssss', 'tttttttttttttttttttt', 'uuuuuuuuuuuuuuuuuuuuu', 'vvvvvvvvvvvvvvvvvvvvvv', 'wwwwwwwwwwwwwwwwwwwwwww', 'xxxxxxxxxxxxxxxxxxxxxxxx', 'yyyyyyyyyyyyyyyyyyyyyyyyy', 'zzzzzzzzzzzzzzzzzzzzzzzzzz']

Method #2 : Using list comprehension + ascii_lowercase + ord()

In this, list comprehension is used to solve this problem. This is shorthand of above method.

Python3

# Python3 code to demonstrate working of
# Index Frequency Alphabet List
# Using list comprehension + ascii_lowercase + ord()
from string import ascii_lowercase
 
# extracting start index
strt_idx = ord('a') - 1
 
# list comprehension to solve as one liner
res = [ele * (ord(ele) - strt_idx) for ele in ascii_lowercase]
 
# printing result
print("The constructed list : " + str(res))

Output

The constructed list : ['a', 'bb', 'ccc', 'dddd', 'eeeee', 'ffffff', 'ggggggg', 'hhhhhhhh', 'iiiiiiiii', 'jjjjjjjjjj', 'kkkkkkkkkkk', 'llllllllllll', 'mmmmmmmmmmmmm', 'nnnnnnnnnnnnnn', 'ooooooooooooooo', 'pppppppppppppppp', 'qqqqqqqqqqqqqqqqq', 'rrrrrrrrrrrrrrrrrr', 'sssssssssssssssssss', 'tttttttttttttttttttt', 'uuuuuuuuuuuuuuuuuuuuu', 'vvvvvvvvvvvvvvvvvvvvvv', 'wwwwwwwwwwwwwwwwwwwwwww', 'xxxxxxxxxxxxxxxxxxxxxxxx', 'yyyyyyyyyyyyyyyyyyyyyyyyy', 'zzzzzzzzzzzzzzzzzzzzzzzzzz']

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