import bpy

from math import radians

# create cube

bpy.ops.mesh.primitive_cube_add()

so = bpy.context.active_object

#so.location[0] = 5

# create modifier

so.modifiers.new("My modifier","SUBSURF")

# change modifier value

so.modifiers["My modifier"].levels = 3

# smooth

bpy.ops.object.shade_smooth()

#mesh = so.data

#for face in mesh.polygons:

#  face.use_smooth = True

# create displacement modifier

mod_displace = so.modifiers.new("My Displacement","DISPLACE")

# create the texture

new_tex = bpy.data.textures.new("My Texture","DISTORTED_NOISE")

# change tex setting

new_tex.noise_scale=2.0

# assign the texture to displacement modifier

mod_displace.texture = new_tex

# create the material

new_mat = bpy.data.materials.new(name="My Material")

so.data.materials.append(new_mat)

new_mat.use_nodes = True

nodes = new_mat.node_tree.nodes