python human readable large numbers [duplicate]

Answer 1

From here:

def commify(n):
    if n is None: return None
    if type(n) is StringType:
        sepdec = localenv['mon_decimal_point']
    else:
        #if n is python float number we use everytime the dot
        sepdec = '.'
    n = str(n)
    if sepdec in n:
        dollars, cents = n.split(sepdec)
    else:
        dollars, cents = n, None

    r = []
    for i, c in enumerate(reversed(str(dollars))):
        if i and (not (i % 3)):
            r.insert(0, localenv['mon_thousands_sep'])
        r.insert(0, c)
    out = ''.join(r)
    if cents:
        out += localenv['mon_decimal_point'] + cents
    return out