np$.$pi

Make sure your $($Python$)$ code passes ALL test provided by the following code:

$"\text{'}"\text{'}$Check whether grodf is a function with a tuple output" $"\text{'}$

assert callable$($gradf$),$ "Sorry, you need gradf defined as a function"

assert isinstance$($grodf$(2$ np$.$pi$/4),$tuple$),$ "Sorry, your output is not a tuple."

assert len$($grgdf $(2,np.\frac{}{4}),$ "Sorry, the answer should be a tuple of length $2$

And

assert abs$($gradf$(2,$np$.$pie$-5,$ "Sorry, partial deriv. w$.$r$.$t$.$ x is wrong"

assert abs$($grgdf$(2$np$.$pie$-5,$ "Sorry, partial deriv. w$.$r$.$t$.$ y is wrong"

And

assert np$.$linglg:norm$($np$.$array$($gradf$(3,$np$.$pi$/6))-$np$.$arraye$-5,$ "Sorry, grodf$(5,$np$.$pi$/3)$ is wrong"

assert np$.$linglg:norm$($np$.$array$($gradf$(5.$np$.$pi$/3))-$np$.$arraye$-5,$ "Sorry, grodf$(5.$n$......$p$/3)$ is wrong"