support python 3+ on learn_embedding method.

[ghost]

learn_embeddings needs minor modification to accept the python3+ 's map function. implemented below

def learn_embeddings(walks):
'''
Learn embeddings by optimizing the Skipgram objective using SGD.
'''
#print(type(walks))
#walks = [map(str, walk) for walk in walks]
walks= [str(j) for i in walks for j in i]

[ghost]

Actually that alone does not fix the issue with Python3 implementation. Above solution I offered has to be changed to the following.

def learn_embeddings(walks):
'''
Learn embeddings by optimizing the Skipgram objective using SGD.
'''
walks = [str(walk) for walk in walks]

model = Word2Vec([walks], size=args.dimensions, window=args.window_size, min_count=1, sg=1, workers=args.workers, iter=args.iter) 	
model.wv.save_word2vec_format(args.output)

print('vocalublary', list(model.wv.vocab), 'length', len(list(model.wv.vocab)))

return

[wen-fei]

why you add '[]' for variable 'walks' again? this mean get walk list embedding instead of node in walks?

[wen-fei]

fix at #35

[liun-online]

hi, thanks your modification! But in my try, walks = [str(walk) for walk in walks] doesn't work, and the final embeddings are of random walks rather than nodes. In my opinion, only list() is needed. Maybe, you can try this walks = [list(map(str, walk)) for walk in walks]. Meanwhile, '[]' can be removed.

[RuYunW]

can change this sentence to
walks = np.array(walks, dtype=str).tolist()

the origin map function aims to change the type of each element into str

[shoegazerstella]

The following works fine on python3:

def learn_embeddings(walks):
	'''
	Learn embeddings by optimizing the Skipgram objective using SGD.
	'''
	walks = [list(map(str, walk)) for walk in walks]
	model = Word2Vec(walks, size=args.dimensions, window=args.window_size, min_count=0, sg=1, workers=args.workers, iter=args.iter)
	model.wv.save_word2vec_format(args.output)

	print('vocalublary', list(model.wv.vocab), 'length', len(list(model.wv.vocab)))
	
	return