Im trying to differentiate the function with code but got error (Reloaded modules: netifaces)

```
from sympy import diff, cos
from sympy.abc import x,y
expr = x**2 +cos(x**3)
diff(expr,x)
```

Im trying to differentiate the function with code but got error (Reloaded modules: netifaces)

```
from sympy import diff, cos
from sympy.abc import x,y
expr = x**2 +cos(x**3)
diff(expr,x)
```

Works for me.

```
>>> import sympy
>>> from sympy import diff, cos
>>> from sympy.abc import x,y
>>> expr = x**2 +cos(x**3)
>>> diff(expr,x)
-3*x**2*sin(x**3) + 2*x
```

Please check your code, and if you are still having an error, copy and

paste the code you are running, the full traceback of the error, and

tell us the version of Python you are running.

1 Like

That’s a linter warning that it is useless to import `y`

from `sympy.abc`

. Indeed, you are not using `y`

. Just change that line to `from sympy.abc import x`

.

1 Like