import bpy
import random

x = random.randint(-6, 6)
y = random.randint(-6, 6)
z = random.randint(-6, 6)

bpy.ops.mesh.primitive_cube_add(radius=1, location=(x, y, z),)

import bpy


class GlobalScriptRunner(bpy.types.Operator):
    """Tooltip"""
    bl_idname = "view3d.global_script_runner"
    bl_label = "Global Script Runner"

    #@classmethod
    #def poll(cls, context):
    #    return context.active_object is not None

    def execute(self, context):
        print('i get called')
        textblock_name = 'generic_executor.py'
        textblock_as_string = bpy.data.texts[textblock_name].as_string()
        exec(textblock_as_string)
        return {'FINISHED'}


def register():
    bpy.utils.register_class(GlobalScriptRunner)


def unregister():
    bpy.utils.unregister_class(GlobalScriptRunner)


if __name__ == "__main__":
    register()