working with the Map Range Node in Blender's Geometry Nodes

blender_map_range_geonode.py

import bpy
import mathutils

def add_map_range(node_tree):
    map_range = node_tree.nodes.new(type="ShaderNodeMapRange")

    # Attributes
    map_range.interpolation_type = "LINEAR"
    map_range.clamp = True
    map_range.location = mathutils.Vector((0, 0))
    map_range.name = "Map Range"
    map_range.label = "<your label for Map Range>"

    # Input Socket
    map_range.inputs["Value"].default_value = 1.0
    map_range.inputs["From Min"].default_value = 1.0
    map_range.inputs["From Max"].default_value = 60.0
    map_range.inputs["To Min"].default_value = 0.0
    map_range.inputs["To Max"].default_value = -1.0
    map_range.inputs["Steps"].default_value = 4.0

    return map_range


# add cube
bpy.ops.mesh.primitive_cube_add()

# add geo nodes
bpy.ops.object.modifier_add(type="NODES")

node_tree = bpy.context.active_object.modifiers['GeometryNodes'].node_group
add_map_range(node_tree)