Attempt at efficient funciton composition on Python

compose.py

from functools import lru_cache

def identity(x):
    return x

@lru_cache(None)
def _make_compose(n):
    if n == 0:
        return lambda: identity
    elif n == 1:
        return identity
    else:
        funcnames = ["f{}".format(i) for i in range(n)]
        code = "(".join(funcnames) + "(*args, **kws" + (")" * n)
        code = "lambda *args, **kws:" + code
        code = "lambda " + ", ".join(funcnames) + ":" + code
        return eval(code)

def compose(*funcs):
    return _make_compose(len(funcs))(*funcs)