convertText.py

def convertText(text):
    words = word_tokenize(text)
    new_string = ''
    for msg in words:
        new_word = ''
        alpha_flag = False
        digit_flag = False
        for c in msg:
            if c.isalpha():
                alpha_flag = True
            elif c.isdigit():
                digit_flag = True
        
        if alpha_flag and digit_flag:
            msg = msg.lower()
            if msg[-4:] != 'ribu' and msg[-3:] != 'rbu' and msg[-2:] != 'rb':
                for c in msg:
                    if c == '1':
                        c = 'i'
                    elif c == '2':
                        c = 's'
                    elif c == '3':
                        c = 'e'
                    elif c == '4':
                        c = 'a'
                    elif c == '5':
                        c = 's'
                    elif c == '6':
                        c = 'g'
                    elif c == '7':
                        c = 't'
                    elif c == '8':
                        c = 'b'
                    elif c == '9':
                        c = 'g'
                    elif c == '0':
                        c = 'o'
                    new_word = new_word + c
        
        if new_word != '':
            new_string = new_string + new_word + ' '
        else:
            new_string = new_string + msg + ' '

    return new_string