#t9 #keyboard #phone #converter #python3 #python #py

t9.py

#!/usr/bin/env python3

"""
1 = abc
2 = def
3 = ghi
4 = jkl
5 = mno
6 = pqr
7 = stu
8 = vwx
9 = yz
0 = ' .,' # space dot comma
"""

alphabet = " .,abcdefghijklmnopqrstuvwxyz"
#          |^--^--^--^--^--^--^--^--^--^-|
#          |  0  1  2  3  4  5  6  7  8 9|
index = lambda char: alphabet.index(char)
lookup = lambda char: str(index(char)//3) * (1+index(char)%3)
resolve = lambda string: " ".join(lookup(char) for char in string)

resolve("space latte")
#> '7 6 1 111 22 0 444 1 77 77 22'