Soundex is a phonetic algorithm for indexing names by sound, as pronounced in English

pySoundex.py

'''
Python implementation of the American Soundex algorithm to match English homophones
Refrence: https://en.wikipedia.org/wiki/Soundex
'''

import regex as re

# Define the Soundex consonant mappings
soundex_mappings = {'1': ['b', 'f', 'p', 'v'], 
                    '2': ['c', 'g', 'j', 'k', 'q', 's', 'x', 'z'], 
                    '3': ['d', 't'], 
                    '4': ['l'], 
                    '5': ['m', 'n'], 
                    '6': ['r']}
   
# Transpose the mappings to create a lookup table for convenience   
soundex_mapping_table = {}
for val,ch_list in soundex_mappings.iteritems():
    for ch in ch_list:
        soundex_mapping_table[ch] = val
        
def get_soundex_code(word):
    '''
    Generates the Soundex code for a given word
    Parameters:
      word (string): word for which the Soundex code is to be generated
    Returns: Soundex code
    '''
    # Convert the word to lower case for consistent lookups
    word = word.lower()
    # Save the first letter of the word
    first_letter = word[0]
    # Remove all occurrences of 'h' and 'w' except first letter
    code = first_letter + re.sub(r'[hw]*', '', word[1:])
    # Replace all consonants (include the first letter) with digits based on Soundex mapping table
    code = ''.join([soundex_mapping_table.get(ch, ch) for ch in code])
    # Replace all adjacent same digits with one digit
    code = re.sub(r'([1-6])\1+', r'\1', code)
    # Remove all occurrences of a, e, i, o, u, y except first letter
    code = code[0] + re.sub(r'[aeiouy]*', '', code[1:])
    # If first symbol is a digit replace it with the saved first letter
    code = re.sub(r'[1-6]', first_letter, code[0]) + code[1:]
    # Append 3 zeros if result contains less than 3 digits
    code = code + '000' if len(code) <= 3 else code
    # Retain the first 4 characters
    code = code[:4]
    # Convert to upper case and return
    return code.upper()
    
##
# Testing
##

test = {'Robert': 'R163', 'Rupert': 'R163', 'Rubin': 'R150', 'Ashcraft': 'A261', 'Ashcroft': 'A261', 'Tymczak': 'T522', 'Pfister': 'P236'}

for word, actual_code in test.iteritems():
    code = get_soundex_code(word)
    print word, code, actual_code, actual_code == code
    
'''
OUTPUT:

Ashcraft A261 A261 True
Robert R163 R163 True
Ashcroft A261 A261 True
Rubin R150 R150 True
Tymczak T522 T522 True
Rupert R163 R163 True
Pfister P236 P236 True

'''

Can you elaborate more? I don't understand the request