Issue with setting the number of workers

[saliyari]

When I try to use dls = TextDataLoaders.from_folder(untar_data(URLs.IMDB), valid='test'), I get a Jupyter warning that I should set num_workers to 0, because multiprocessing is not currently supported on IPython and windows installation. Set num_workers to 0.

I tried this, which I found by searching, but I get an error.

dls.train_dl.new(num_workers=0)
dls.valid_dl.new(num_workers=0)

The log is below:

---

AttributeError Traceback (most recent call last)
Cell In[8], line 1
----> 1 dls.train_dl.new(num_workers=0)
2 dls.valid_dl.new(num_workers=0)

File C:\Program Files\Python311\Lib\site-packages\fastcore\basics.py:496, in GetAttr.getattr(self, k)
494 if self._component_attr_filter(k):
495 attr = getattr(self,self._default,None)
--> 496 if attr is not None: return getattr(attr,k)
497 raise AttributeError(k)

File C:\Program Files\Python311\Lib\site-packages\fastcore\basics.py:496, in GetAttr.getattr(self, k)
494 if self._component_attr_filter(k):
495 attr = getattr(self,self._default,None)
--> 496 if attr is not None: return getattr(attr,k)
497 raise AttributeError(k)

File C:\Program Files\Python311\Lib\site-packages\fastai\data\core.py:450, in Datasets.getattr(self, k)
--> 450 def getattr(self,k): return gather_attrs(self, k, 'tls')

File C:\Program Files\Python311\Lib\site-packages\fastcore\transform.py:173, in gather_attrs(o, k, nm)
171 att = getattr(o,nm)
172 res = [t for t in att.attrgot(k) if t is not None]
--> 173 if not res: raise AttributeError(k)
174 return res[0] if len(res)==1 else L(res)

AttributeError: train_dl