phone directory

def extract_name(line):
    start = line.find('<')
    stop = line.find('>')
    return line[start + 1:stop], line[:start] + line[stop + 1:]
    
def extract_phone(line):
    """
    TA-1234123 +1-123-123-1233
    """
    plus_pos = line.find('+')
    first_dash_pos = line.find('-', plus_pos)
    phone = line[plus_pos + 1 : first_dash_pos] + line[first_dash_pos: first_dash_pos + 13]
    new_line = line[:plus_pos] + line[plus_pos + len(phone) + 1:]
    return phone, new_line    

WHITELIST = ['.','-']
def extract_address(line):
    cleaned = ['']
    prev = ''
    for i in range(len(line)):
        c = line[i]
        if c.isalpha() or c.isnumeric() or c in WHITELIST:
            cleaned.append(c)
        if c == '_':
            cleaned.append(' ')
        if c == ' ' and cleaned[-1] != ' ':
            cleaned.append(' ')
        
    jointed = ''.join(cleaned).strip()
    return jointed
        

def extract_data(line):
    name, new_line = extract_name(line)
    phone, new_line = extract_phone(new_line)
    address = extract_address(new_line)
    return phone, address, name

def search_number(notebook, num):
    results  = []
    for phone, name, address in notebook:
        if phone == num:
            results.append([phone,name,address])
    return results

def phone(notebook_raw, num):
    lines = notebook_raw.split('\n')
    notebook = []
    for line in lines:
        phone, address, name = extract_data(line)
        notebook.append([phone,name, address])
    results = search_number(notebook, num)
    
    if len(results) == 0:
        return "Error => Not found: " + num
    if len(results) > 1:
        return "Error => Too many people: " + num
    phone, name, address = results[0]
    return "Phone => %s, Name => %s, Address => %s" % (phone, name, address)