std.Expr with sin/cos (VS) #Bad idea#

ALWAYS SLOWER THAN STD.LUT
This should only really be used if you absolutely must use std.Expr

import math
from functools import partial

def trig_expr(acc=7, func='sin'):
    a = list(range(5, acc+1, 2))
    f = [math.factorial(x) for x in a]
    pm = {0: '+', 1: '-'}
    ds = {False: 'dup1', True: 'swap'}
    e = ' {} dup dup 3 pow 6 / - '.format('' if func=='sin' else ' {} 2 / + '.format(math.pi))
    for i in range(acc//2 - 1):
        e += ' {} {} pow {} / {} '.format(ds[i == acc//2 - 2], a[i], f[i], pm[i%2])
    return e

sin, cos = [partial(trig_expr, func=f) for f in ('sin', 'cos')]

"""
expr = 'x sin'.replace('sin', sin(7) )
core.std.Expr(clip32, expr)
"""