for when functools.partial is not enough (and you want to reinvent the sauce)

cur.py

# function:defaults code:argcount code:varnames can be used for precise curry

def vars(fun):
    defaults = fun.__defaults__
    argcount = fun.__code__.co_argcount
    varnames = fun.__code__.co_varnames
    return defaults, argcount, varnames

def cu(f):
    """
    TODO: return self..
    TODO: handle keywords
    """
    bindings = []
    _, _, varnames = vars(f)
    def satisfied():
        return len(varnames) <= len(bindings)
    def cur(*a,**k):
        if satisfied():
            return f(**dict(bindings))
        else:
            names = varnames[len(bindings):]
            fresh = list(zip(names, a))
            bindings.extend(fresh)
            if satisfied():
                return f(**dict(bindings))
    return cur