import bpy
import math

# This will remove all the objects.  Did we really need to?
# It's handy if we're going to run this a bunch of times
bpy.ops.object.select_all(action='SELECT') # Default action is TOGGLE
bpy.ops.object.delete()

def make_panel(c_level=2.0, res=1000, size=200):
    bpy.ops.mesh.primitive_grid_add(x_subdivisions=res, y_subdivisions=1, size=size)
    plane = bpy.context.active_object

    for i in range(len(plane.data.vertices)):
        plane.data.vertices[i].co.z += c_level * math.sin(plane.data.vertices[i].co.x)
        
    return plane
        
p = make_panel(c_level = 3.0, res=500)
p.rotation_euler[0] += math.pi/4