def h1vp(v,z,n=<NUM_LIT:1>):
if not isinstance(n,int) or (n < <NUM_LIT:0>):<EOL><INDENT>raise ValueError("<STR_LIT>")<EOL><DEDENT>if n == <NUM_LIT:0>:<EOL><INDENT>return hankel1(v,z)<EOL><DEDENT>else:<EOL><INDENT>return _bessel_diff_formula(v, z, n, hankel1, -<NUM_LIT:1>)<EOL><DEDENT>
Return the nth derivative of H1v(z) with respect to z.