Hi, I am working through some fastai example code and have encountered an error. I ran the following code (that I copied and pasted from the fastai website):
from fastai.vision.all import *
from fastai.text.all import *
from fastai.collab import *
from fastai.tabular.all import *
path = untar_data(URLs.PETS)/'images'
def is_cat(x): return x[0].isupper()
dls = ImageDataLoaders.from_name_func(
path, get_image_files(path), valid_pct=0.2, seed=42,
label_func=is_cat, item_tfms=Resize(224))
learn = vision_learner(dls, resnet34, metrics=error_rate)
learn.fine_tune(1)
I got the following error message from the call to from_name_func:
PS C:\Users\XXXX\Documents\Code\fastbook> & 'C:\Python310\python.exe' 'c:\Users\XXXX\.vscode\extensions\ms-python.python-2022.20.1\pythonFiles\lib\python\debugpy\adapter/../..\debugpy\launcher' '64021' '--' 'c:\Users\XXXX\Documents\Code\fastbook\fastaitest.py'
Could not do one pass in your dataloader, there is something wrong in it. Please see the stack trace below:
Backend TkAgg is interactive backend. Turning interactive mode on.
Traceback (most recent call last):
File "C:\Python310\lib\runpy.py", line 196, in _run_module_as_main
return _run_code(code, main_globals, None,
File "C:\Python310\lib\runpy.py", line 86, in _run_code
exec(code, run_globals)
File "c:\Users\XXXX\.vscode\extensions\ms-python.python-2022.20.1\pythonFiles\lib\python\debugpy\__main__.py", line 39, in <module>
cli.main()
File "c:\Users\XXXX\.vscode\extensions\ms-python.python-2022.20.1\pythonFiles\lib\python\debugpy/..\debugpy\server\cli.py", line 430, in main
run()
File "c:\Users\XXXX\.vscode\extensions\ms-python.python-2022.20.1\pythonFiles\lib\python\debugpy/..\debugpy\server\cli.py", line 284, in run_file
runpy.run_path(target, run_name="__main__")
File "c:\Users\XXXX\.vscode\extensions\ms-python.python-2022.20.1\pythonFiles\lib\python\debugpy\_vendored\pydevd\_pydevd_bundle\pydevd_runpy.py", line 321, in run_path
return _run_module_code(code, init_globals, run_name,
File "c:\Users\XXXX\.vscode\extensions\ms-python.python-2022.20.1\pythonFiles\lib\python\debugpy\_vendored\pydevd\_pydevd_bundle\pydevd_runpy.py", line 135, in _run_module_code
_run_code(code, mod_globals, init_globals,
File "c:\Users\XXXX\.vscode\extensions\ms-python.python-2022.20.1\pythonFiles\lib\python\debugpy\_vendored\pydevd\_pydevd_bundle\pydevd_runpy.py", line 124, in _run_code
exec(code, run_globals)
File "c:\Users\XXXX\Documents\Code\fastbook\fastaitest.py", line 9, in <module>
dls = ImageDataLoaders.from_name_func(
File "C:\Python310\lib\site-packages\fastai\vision\data.py", line 149, in from_name_func
return cls.from_path_func(path, fnames, f, **kwargs)
File "C:\Python310\lib\site-packages\fastai\vision\data.py", line 135, in from_path_func
return cls.from_dblock(dblock, fnames, path=path, **kwargs)
File "C:\Python310\lib\site-packages\fastai\data\core.py", line 281, in from_dblock
return dblock.dataloaders(source, path=path, bs=bs, val_bs=val_bs, shuffle=shuffle, device=device, **kwargs)
File "C:\Python310\lib\site-packages\fastai\data\block.py", line 157, in dataloaders
return dsets.dataloaders(path=path, after_item=self.item_tfms, after_batch=self.batch_tfms, **kwargs)
File "C:\Python310\lib\site-packages\fastai\data\core.py", line 334, in dataloaders
dls = [dl] + [dl.new(self.subset(i), **merge(kwargs,def_kwargs,val_kwargs,dl_kwargs[i]))
File "C:\Python310\lib\site-packages\fastai\data\core.py", line 334, in <listcomp>
dls = [dl] + [dl.new(self.subset(i), **merge(kwargs,def_kwargs,val_kwargs,dl_kwargs[i]))
File "C:\Python310\lib\site-packages\fastai\data\core.py", line 97, in new
self._one_pass()
File "C:\Python310\lib\site-packages\fastai\data\core.py", line 78, in _one_pass
b = self.do_batch([self.do_item(None)])
File "C:\Python310\lib\site-packages\fastai\data\load.py", line 153, in do_item
try: return self.after_item(self.create_item(s))
File "C:\Python310\lib\site-packages\fastcore\transform.py", line 208, in __call__
def __call__(self, o): return compose_tfms(o, tfms=self.fs, split_idx=self.split_idx)
File "C:\Python310\lib\site-packages\fastcore\transform.py", line 158, in compose_tfms
x = f(x, **kwargs)
File "C:\Python310\lib\site-packages\fastcore\transform.py", line 81, in __call__
def __call__(self, x, **kwargs): return self._call('encodes', x, **kwargs)
File "C:\Python310\lib\site-packages\fastcore\transform.py", line 91, in _call
return self._do_call(getattr(self, fn), x, **kwargs)
File "C:\Python310\lib\site-packages\fastcore\transform.py", line 98, in _do_call
res = tuple(self._do_call(f, x_, **kwargs) for x_ in x)
File "C:\Python310\lib\site-packages\fastcore\transform.py", line 98, in <genexpr>
res = tuple(self._do_call(f, x_, **kwargs) for x_ in x)
File "C:\Python310\lib\site-packages\fastcore\transform.py", line 97, in _do_call
return retain_type(f(x, **kwargs), x, ret)
File "C:\Python310\lib\site-packages\fastcore\dispatch.py", line 120, in __call__
return f(*args, **kwargs)
File "C:\Python310\lib\site-packages\fastai\vision\core.py", line 236, in encodes
def encodes(self, o:PILBase): return o._tensor_cls(image2tensor(o))
File "C:\Python310\lib\site-packages\fastai\vision\core.py", line 106, in image2tensor
res = tensor(img)
File "C:\Python310\lib\site-packages\fastai\torch_core.py", line 154, in tensor
else _array2tensor(array(x), **kwargs))
File "C:\Python310\lib\site-packages\fastai\torch_core.py", line 136, in _array2tensor
if sys.platform == "win32" and x.dtype==np.int: x = x.astype(np.int64)
File "C:\Python310\lib\site-packages\numpy\__init__.py", line 284, in __getattr__
raise AttributeError("module {!r} has no attribute "
AttributeError: module 'numpy' has no attribute 'int'. Did you mean: 'inf'?
I had a look at torch_core.py and according to intellisense np has no member called int. So it looks like numpy has changed and has broken fastai?
I got my code running by changing torch_core.py line 136 to:
if sys.platform == "win32" and x.dtype==np.int32: x = x.astype(np.int64)
Pip package versions:
- numpy 1.24.0
- fastai 2.7.10
- torch 1.13.1
Python version is 3.10.7