Re: [lojban] Consonant Clusters?

["fagricipni" <lojban707@fagricipni.com>]

OK, I've gone ahead and done all three, they are called:
is_lujvo_triple(), is_cmene_triple(), is_init_triple() .

Since the following functions are the fundamental core of my
consonant and consonant pair type quizzing programs, and will
serve the same function in my consonant triple type quizzing
program; I'm asking any programmers to look over this code and
make sure that I have not done anything stupid in these
functions.  I'll put up the full code on my web site when I am
done writing the triple _quizzing_ part; based on my experience
with writing the other quizzing parts that should be done by
Monday evening _at the very latest_.  If anyone wants to be
emailed the full Python code when the program is complete, send
a request to lojban707@fagricipni.com requesting the complete
program.

def is_unvoiced(letter):
    return (letter in ("c","f","k","p","s","t","x"))

def is_voiced(letter):
    return (letter in ("b","d","g","j","v","z"))

def is_syllabic(letter):
    return (letter in ("l","m","n","r"))

def is_permiss_pair(pair):
    if ( is_voiced(pair[0]) and is_unvoiced(pair[1]) ) or \
       ( is_unvoiced(pair[0]) and is_voiced(pair[1]) ):
        return False
    if pair[0]==pair[1]:
        return False
    if pair in ("cs","sc","jz","zj","cx","kx","xc","xk","mz"):
        return False
    return True

def is_init_pair(pair):
    return (pair in ("bl","br","cf","ck","cl","cm","cn","cp","cr",
                     "ct","dj","dr","dz","fl","fr","gl","gr","jb",
                     "jd","jg","jm","jv","kl","kr","ml","mr","pl",
                     "pr","sf","sk","sl","sm","sn","sp","sr","st",
                     "tc","tr","ts","vl","vr","xl","xr","zb","zd",
                     "zg","zm","zv"))

def is_lujvo_triple(triple):
    if triple in ("ndj","ndz","ntc","nts"):
        return False
    if is_permiss_pair(triple[:2]) and is_init_pair(triple[1:]):
        return True
    return False

def is_cmene_triple(triple):
    if is_permiss_pair(triple[:2]) and is_permiss_pair(triple[1:]):
        return True
    return False

def is_init_triple(triple):
    if is_init_pair(triple[:2]) and is_init_pair(triple[1:]):
        return True
    return False


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