Do it:

python -c "import moviepy; print(moviepy._version_)"

And if your version is:

2.1.1

Use:

from moviepy import (
    ImageClip, 
    TextClip, 
    CompositeVideoClip, 
    AudioFileClip,
    concatenate_videoclips,
    VideoFileClip
)
from moviepy.video.fx import Crop