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Python program to generate a list of alphabets in lexical order

  • Last Updated : 11 Oct, 2020

Prerequisite: chr()

The following methods explain how a python list with alphabets in lexical(alphabetic) order can be generated dynamically using chr() method.

Approach:

The core of the concept in both methods is almost same, they only differ in implementation:

  1. Validate size of alphabet list(size=26).
  2. If size>26, change to 26.
  3. If sizeā‰¤0, no meaning left to the function and to make it meaningful set size to 26.
  4. Use chr() to produce the list using any of following methods.

Method 1: Using loop

Python3




# function to get the list of alphabets
def generateAlphabetListDynamically(size = 26):
  size = 26 if (size > 26 or size <= 0) else size
    
  # Empty list 
  alphabetList = []
    
  # Looping from 0 to required size 
  for i in range(size):
    alphabetList.append(chr(65 + i))
    
  # return the generated list
  return alphabetList
  
  
alphabetList = generateAlphabetListDynamically()
print('The alphabets in the list are:', *alphabetList)

Output:

The alphabets in the list are: A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

Method 2: using list comprehension

Python3




def generateAlphabetListDynamically(size=26):
    size = 26 if (size > 26 or size <= 0) else size
  
    # Here we are looping from 0 to upto specified size
    # 65 is added because it is ascii equivalent of 'A'
    alphabetList = [chr(i+65) for i in range(size)]
  
    # returning the list
    return alphabetList
  
  
# Calling the function to get the alphabets
alphabetList = generateAlphabetListDynamically()
print('The alphabets in the list are:', *alphabetList)

Output:

The alphabets in the list are: A B C D E F G H I J K L M N O P Q R S T U V W X Y Z


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