Python | Ways to initialize list with alphabets

Python | Ways to initialize list with alphabets

Initializing a list with alphabets can be useful for various tasks. Here's how you can initialize a list with the English alphabets in Python:

1. Using string module:

The string module provides constants ascii_lowercase and ascii_uppercase which represent the lowercase and uppercase English alphabets respectively.

import string lowercase_alphabets = list(string.ascii_lowercase) print(lowercase_alphabets) uppercase_alphabets = list(string.ascii_uppercase) print(uppercase_alphabets)

2. Using list comprehension with chr():

The ASCII values of lowercase alphabets are from 97 (a) to 122 (z). For uppercase, they are from 65 (A) to 90 (Z). You can use this information with the chr() function:

lowercase_alphabets = [chr(i) for i in range(97, 123)] print(lowercase_alphabets) uppercase_alphabets = [chr(i) for i in range(65, 91)] print(uppercase_alphabets)

3. Using direct assignment:

For short lists like alphabets, you can directly assign them:

lowercase_alphabets = ['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'] print(lowercase_alphabets) uppercase_alphabets = ['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'] print(uppercase_alphabets)

4. Using map():

You can combine map() with the chr() function:

lowercase_alphabets = list(map(chr, range(97, 123))) print(lowercase_alphabets) uppercase_alphabets = list(map(chr, range(65, 91))) print(uppercase_alphabets)

Tips:

  • If you're frequently going to use alphabets in this manner, the string module approach would be more readable and easier for others to understand your intent.
  • The direct assignment method is less dynamic and would not be suitable for longer sequences or for sequences that might change.

By using any of the above methods, you can easily initialize a list with English alphabets in Python.

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