Задача с текстовым файлом, с применением словаря

def remove_last_symbol(line):
    if line[-1:] == "\n":
        line = line[:-1]
    return line
 
 
def Save_num(line):
    line = remove_last_symbol(line)
    num = int(line)
    return num
 
 
def Save_first_word(line, i=0):
    while line[i] != ' ':
        i = i + 1
    first_word = line[:i]
    return first_word
 
 
def If_fem_del(word):
    if word[-1] == 'а':
        word = word[:-1]
 
 
def Read_file_proc(name_file, count=0):
    my_dict = {}
    file = open(name_file, 'r')
    one_line = file.readline()
    numbers = Save_num(one_line)
    one_line = file.readline()
    for i in range(numbers):
        one_line = remove_last_symbol(one_line)
        if len(one_line) > 0:
            surname = Save_first_word(one_line)
            If_fem_del(surname)
            one_line = file.readline()
            one_line = remove_last_symbol(one_line)
            if not (one_line in my_dict):
                my_dict[one_line] = surname
            else:
                count = count + 1
        one_line = file.readline()
    file.close()
    return count
 
input_name = 'telephone.txt'
count_famile = Read_file_proc(input_name)
print(count_famile)

fname = 'telefone.txt'
with open(fname) as f:
    n = int(f.readline().strip())
    my_list = f.read().splitlines()
 
telefone_book = {}
for i in range(n):
    k = my_list[2*i+1].strip()
    surname = my_list[2*i].strip().split()[0]
    if surname.endswith('а'):
        surname = surname[:-1]
    telefone_book.setdefault(k, set()).add(surname)
print(telefone_book)
 
cnt = 0
for k, v in telefone_book.items():
    cnt += len(v)
    
print(cnt)