Get T9 text words from string of phone-entered digits.

get_t9.py

#!/usr/bin/env python3

str_one = "444333 99966688 277733 7773323444664 84433 22244474433777, 99966688 277733 666552999. 99966688777 777744277733 666333 84433 443344477778 4447777 44466 99966688777 4466688777733. 84433 5533999 8666 84433 55566622255 4447777 22335556669. 4666 8666 727774447777."
str_two = "47777888 995559888 4555 47777888 44999988 666555997 : 8555444888477744488866888648833369!!"

t9_text = {
    "2": "a",
    "22": "b",
    "222": "c",
    "3": "d",
    "33": "e",
    "333": "f",
    "4": "g",
    "44": "h",
    "444": "i",
    "5": "j",
    "55": "k",
    "555": "l",
    "6": "m",
    "66": "n",
    "666": "o",
    "7": "p",
    "77": "q",
    "777": "r",
    "7777": "s",
    "8": "t",
    "88": "u",
    "888": "v",
    "9": "w",
    "99": "x",
    "999": "y",
    "9999": "z"
}

def getsinglenumbergroup(num_message):
    char_str = num_message[0]
    for char in num_message[1:]:
        if char == char_str[-1]:
            char_str += char
        else:
            break
    return char_str

def getnumbergroups(num_message):
    number_groups = []
    while True:
        try:
            num_string = getsinglenumbergroup(num_message)
            number_groups.append(num_string)
            num_message = num_message[len(num_string):]
        except:
            break
    return number_groups

def numberstowords(num_str_list, t9_text):
    decoded_str = ""
    for number in num_str_list:
        decoded_str += t9_text[number]
    return decoded_str

def getsentence(num_sentence):
    decoded_sentence = ""
    num_sentence = num_sentence.replace(".", "").replace(",", "").replace(":", "").replace("!","")
    for word in num_sentence.split(" "):
        word_groups = getnumbergroups(word)
        decoded_sentence += numberstowords(word_groups, t9_text)
        decoded_sentence += " "
    return decoded_sentence.upper()


print(getsentence(str_one))
print()
print(print(getsentence(str_two)))


# https://cryptii.com/
# Reverse alphabetical substitution
# gsv xlwv gl gsv hzu olxp : tlivgrivnvmgufmw !!
# THE CODE TO THE SAF LOCK : GORETIREMENTFUND !!