Import object from python I create some small my own primitives. Is possible import it from blender file?

For example in blender file my1.blend I have object caled "my1". I prefer working on small files with one object in one file and next join it together and put location/scale in specyfic way.

I need import this object into my current blender project (other than my1, for example all.blend) in specyfic x,y,z location, and scaling to 1.5 factor. My object have some modyficators, materials etc.

I need only read object, materials, color etc. No scenes, lights etc.
You'll want to look at bpy.data.libraries.load(), which allows you to open a Blendfile and select which datablocks (objects, meshes, materials, etc.) you want to append or link. The API documentation also has examples.