i found some bug in you code.

[JackJessada]

embedder.py line 116

embeddings.append(embedding.numpy))

it shoud be

embeddings.append((embedding.numpy))

and in hypersum.py

line 27 - 28

embeddings, sentence_index = self.embedder.embed(sentences)
distances = pairwise_distances(embeddings, metric="cosine")

it error float() argument must be a string or a real number, not 'builtin_function_or_method' because

embeddings, sentence_index = self.embedder.embed(sentences)

embeddings is a list of numpy.

but

pairwise_distances(embeddings, metric="cosine")

require real number or string

[seongminp]

Line 116 in embedder.py should be embeddings.append(embedding.numpy())

Also there is a suspicious trailing ( at the end of embedder.py. Probably some shenanigans during copy paste.