semck: use is_empty instead of len() == 0
semck: use is_empty instead of len() == 0

dinfuehr/dora,riginding/dora,riginding/dora,riginding/dora,dinfuehr/dora,dinfuehr/dora,dinfuehr/dora,riginding/dora,riginding/dora,dinfuehr/dora,riginding/dora,dinfuehr/dora,riginding/dora