Runtime error(UnboundNameException):name'curve' is not defined

Grasshopper
1

i am using this script to divide line to several points but get error when i try to compile.

import Rhino.Geometry as rg
import ghpythonlib.treehelpers as th

def divide_curve(curve, num_segments):
    if not curve or num_segments <= 0:
        return None  # Ensure valid input

    total_length = curve.GetLength()
    offset = 160  # Fixed offset from both ends
    
    if total_length <= 2 * offset:
        return None  # Avoid errors if the curve is too short

    remaining_length = total_length - 2 * offset
    segment_length = remaining_length / num_segments

    # Generate division points along the curve
    params = [curve.Domain.T0]  # Start point
    for i in range(1, num_segments):
        success, param_at_length = curve.LengthParameter(offset + i * segment_length)
        if success:  # Only append if the parameter is valid
            params.append(param_at_length)
    params.append(curve.Domain.T1)  # End point

    points = [curve.PointAt(param) for param in params]
    
    return th.list_to_tree(points)

# Ensure 'curve' is defined in Grasshopper inputs
division_points = divide_curve(curve, num_segments)