human
Solve the following python programming problem given the following code:
def besselsimp(expr) : 
    '
    Simplify bessel-type functions.

    This routine tries to simplify bessel-type functions. Currently it only
    works on the Bessel J and I functions, however. It works by looking at all
    such functions in turn, and eliminating factors of "I" and "-1" (actually
    their polar equivalents) in front of the argument. Then, functions of
    half-integer order are rewritten using strigonometric functions and
    functions of integer order (> 1) are rewritten using functions
    of low order.  Finally, if the expression was changed, compute
    factorization of the result with factor().

    >>> from sympy import besselj, besseli, besselsimp, polar_lift, I, S
    >>> from sympy.abc import z, nu
    >>> besselsimp(besselj(nu, z*polar_lift(-1)))
    exp(I*pi*nu)*besselj(nu, z)
    >>> besselsimp(besseli(nu, z*polar_lift(-I)))
    exp(-I*pi*nu/2)*besselj(nu, z)
    >>> besselsimp(besseli(S(-1)/2, z))
    sqrt(2)*cosh(z)/(sqrt(pi)*sqrt(z))
    >>> besselsimp(z*besseli(0, z) + z*(besseli(2, z))/2 + besseli(1, z))
    3*z*besseli(0, z)/2
    ' 
    def replacer(fro, to, factors) : 
        factors = set (factors) 
        def repl(nu, z) : 
            if factors.intersection (Mul.make_args (z)) : 
                return to (nu, z) 
return fro (nu, z) 
return repl 
def torewrite(fro, to) : 
        def tofunc(nu, z) : 
            return fro (nu, z).rewrite (to) 
return tofunc 
def tominus(fro) : 
        def tofunc(nu, z) : 
            return (exp (((I * pi) * nu)) * fro (nu, (exp_polar (((- I) * pi)) * z))) 
return tofunc 
orig_expr = expr 
    ifactors = [I, exp_polar (((I * pi) / 2)), exp_polar ((((- I) * pi) / 2))] 
    expr = expr.replace (besselj, replacer (besselj, torewrite (besselj, besseli), minusfactors)) 
    expr = expr.replace (besseli, replacer (besseli, torewrite (besseli, besselj), ifactors)) 
    minusfactors = [(- 1), exp_polar ((I * pi))] 
    expr = expr.replace (besselj, replacer (besselj, tominus (besselj), minusfactors)) 
    expr = expr.replace (besseli,...

    
    

    Fix the buggy line: expr = expr.replace (besselj, replacer (besselj, torewrite (besselj, besseli), minusfactors))
assistant
#Here is Python code to fix the buggy line: expr = expr.

expr = expr.replace (besselj, replacer (besselj, torewrite (besselj, besseli), ifactors))