I've installed pytorch and fastai via conda:
conda list
...
fastai 1.0.28 py_1 fastai
pytorch 1.0.0 py3.6_1 pytorch
torchtext 0.3.1 <pip>
torchvision 0.2.1 py_2 pytorch
I'm using one of the fastai models. The code to load the model is this ( the very last line is the one that fails):
import numpy as np
import torch
from fastai import untar_data, URLs
import pickle
from fastai.text import get_language_model
from torchtext import data
# puzzling the pieces together
# get weights and itos
model_path = untar_data(URLs.WT103, data=False)
fnames = [list(model_path.glob(f'*.{ext}'))[0] for ext in ['pth', 'pkl']]
wgts_fname, itos_fname = fnames
itos = pickle.load(open(itos_fname, 'rb'))
wgts = torch.load(wgts_fname, map_location=lambda storage, loc: storage)
It produces the error:
dyld: Symbol not found: _PySlice_Unpack
Referenced from: /anaconda3/envs/t1/lib/python3.6/site-packages/torch/lib/libtorch_python.dylib
Expected in: flat namespace
After browsing SO, I found this related question: dyld: Symbol not found: error how to resolve this issue
Apparently an error about dyld symbols is related to missing dependencies/broken paths to binaries.
In this case it looks like a pytorch internal problem to me. How can something like this happen when using a package manager like conda? My operating system is MacOS 10.14.2
