'Tensor' object has no attribute 'ndim' in lesson2-sgd

[aseedb]

While running

a = nn.Parameter(tensor(-1.,1))

fig = plt.figure()
plt.scatter(x[:,0], y, c='orange')
with torch.no_grad():
    line, = plt.plot(x[:,0], x@a)
plt.close()

def animate(i):
    update()
    with torch.no_grad():
        line.set_ydata(x@a)
    return line,

animation.FuncAnimation(fig, animate, np.arange(0, 100), interval=20)

I am getting this exception:

AttributeError: 'Tensor' object has no attribute 'ndim'

forplt.plot(x[:,0], x@a)

my conda installation is

packages in environment at /home/paperspace/anaconda3:

Name Version Build Channel

_anaconda_depends 2019.03 py37_0
_ipyw_jlab_nb_ext_conf 0.1.0 py37_0
_libgcc_mutex 0.1 main
_pytorch_select 0.1 cpu_0
alabaster 0.7.12 py37_0
anaconda custom py37_1
anaconda-client 1.7.2 py37_0
anaconda-navigator 1.9.7 py37_0
anaconda-project 0.8.4 py_0
asn1crypto 1.3.0 py37_0
astroid 2.3.3 py37_0
astropy 4.0 py37h7b6447c_0
atomicwrites 1.3.0 py37_1
attrs 19.3.0 py_0
babel 2.8.0 py_0
backcall 0.1.0 py37_0
backports 1.0 py_2
backports.functools_lru_cache 1.6.1 py_0
backports.os 0.1.1 py37_0
backports.shutil_get_terminal_size 1.0.0 py37_2
backports.tempfile 1.0 py_1
backports.weakref 1.0.post1 py_1
beautifulsoup4 4.8.2 py37_0
bitarray 1.2.1 py37h7b6447c_0
bkcharts 0.2 py37_0
blas 1.0 mkl
bleach 3.1.0 py37_0
blosc 1.16.3 hd408876_0
bokeh 1.4.0 py37_0
boto 2.49.0 py37_0
bottleneck 1.3.2 py37heb32a55_0
bzip2 1.0.8 h7b6447c_0
ca-certificates 2020.1.1 0
cairo 1.14.12 h8948797_3
certifi 2019.11.28 py37_0
cffi 1.14.0 py37h2e261b9_0
chardet 3.0.4 py37_1003
click 7.0 py37_0
cloudpickle 1.3.0 py_0
clyent 1.2.2 py37_1
colorama 0.4.3 py_0
conda 4.8.2 py37_0
conda-build 3.18.11 py37_0
conda-env 2.6.0 1
conda-package-handling 1.6.0 py37h7b6447c_0
conda-verify 3.4.2 py_1
contextlib2 0.6.0.post1 py_0
cryptography 2.8 py37h1ba5d50_0
cuda92 1.0 0 pytorch
cudatoolkit 10.2.89 hfd86e86_0
curl 7.68.0 hbc83047_0
cycler 0.10.0 py37_0
cymem 2.0.2 py37hfd86e86_0
cython 0.29.15 py37he6710b0_0
cython-blis 0.2.4 py37h516909a_1 fastai
cytoolz 0.10.1 py37h7b6447c_0
dask 2.11.0 py_0
dask-core 2.11.0 py_0
dataclasses 0.7 py37_0
dbus 1.13.12 h746ee38_0
decorator 4.4.1 py_0
defusedxml 0.6.0 py_0
distributed 2.11.0 py37_0
docutils 0.16 py37_0
entrypoints 0.3 py37_0
et_xmlfile 1.0.1 py37_0
expat 2.2.6 he6710b0_0
fastai 1.0.60 1 fastai
fastcache 1.1.0 py37h7b6447c_0
fastprogress 0.2.2 py_0 fastai
filelock 3.0.12 py_0
flask 1.1.1 py_0
fontconfig 2.13.0 h9420a91_0
freetype 2.9.1 h8a8886c_1
fribidi 1.0.5 h7b6447c_0
fsspec 0.6.2 py_0
future 0.18.2 py37_0
get_terminal_size 1.0.0 haa9412d_0
gevent 1.4.0 py37h7b6447c_0
glib 2.63.1 h5a9c865_0
glob2 0.7 py_0
gmp 6.1.2 h6c8ec71_1
gmpy2 2.0.8 py37h10f8cd9_2
graphite2 1.3.13 h23475e2_0
greenlet 0.4.15 py37h7b6447c_0
gst-plugins-base 1.14.0 hbbd80ab_1
gstreamer 1.14.0 hb453b48_1
h5py 2.10.0 py37h7918eee_0
harfbuzz 1.8.8 hffaf4a1_0
hdf5 1.10.4 hb1b8bf9_0
heapdict 1.0.1 py_0
html5lib 1.0.1 py37_0
hypothesis 5.5.4 py_0
icu 58.2 h9c2bf20_1
idna 2.8 py37_0
imageio 2.6.1 py37_0
imagesize 1.2.0 py_0
importlib_metadata 1.5.0 py37_0
intel-openmp 2020.0 166
ipykernel 5.1.4 py37h39e3cac_0
ipython 7.12.0 py37h5ca1d4c_0
ipython_genutils 0.2.0 py37_0
ipywidgets 7.5.1 py_0
isort 4.3.21 py37_0
itsdangerous 1.1.0 py37_0
jbig 2.1 hdba287a_0
jdcal 1.4.1 py_0
jedi 0.16.0 py37_0
jeepney 0.4.2 py_0
jinja2 2.11.1 py_0
joblib 0.14.1 py_0
jpeg 9b h024ee3a_2
json5 0.9.1 py_0
jsonschema 3.2.0 py37_0
jupyter 1.0.0 py37_7
jupyter_client 5.3.4 py37_0
jupyter_console 6.1.0 py_0
jupyter_core 4.6.1 py37_0
jupyterlab 1.2.6 pyhf63ae98_0
jupyterlab_server 1.0.6 py_0
keyring 21.1.0 py37_0
kiwisolver 1.1.0 py37he6710b0_0
krb5 1.17.1 h173b8e3_0
lazy-object-proxy 1.4.3 py37h7b6447c_0
ld_impl_linux-64 2.33.1 h53a641e_7
libarchive 3.3.3 h5d8350f_5
libcurl 7.68.0 h20c2e04_0
libedit 3.1.20181209 hc058e9b_0
libffi 3.2.1 hd88cf55_4
libgcc-ng 9.1.0 hdf63c60_0
libgfortran-ng 7.3.0 hdf63c60_0
liblief 0.9.0 h7725739_2
libpng 1.6.37 hbc83047_0
libsodium 1.0.16 h1bed415_0
libssh2 1.8.2 h1ba5d50_0
libstdcxx-ng 9.1.0 hdf63c60_0
libtiff 4.1.0 h2733197_0
libtool 2.4.6 h7b6447c_5
libuuid 1.0.3 h1bed415_2
libxcb 1.13 h1bed415_1
libxml2 2.9.9 hea5a465_1
libxslt 1.1.33 h7d1a2b0_0
llvmlite 0.31.0 py37hd408876_0
locket 0.2.0 py37_1
lxml 4.5.0 py37hefd8a0e_0
lz4-c 1.8.1.2 h14c3975_0
lzo 2.10 h49e0be7_2
markupsafe 1.1.1 py37h7b6447c_0
matplotlib 3.1.3 py37_0
matplotlib-base 3.1.3 py37hef1b27d_0
mccabe 0.6.1 py37_1
mistune 0.8.4 py37h7b6447c_0
mkl 2020.0 166
mkl-service 2.3.0 py37he904b0f_0
mkl_fft 1.0.15 py37ha843d7b_0
mkl_random 1.1.0 py37hd6b4f25_0
mock 4.0.1 py_0
more-itertools 8.2.0 py_0
mpc 1.1.0 h10f8cd9_1
mpfr 4.0.1 hdf1c602_3
mpmath 1.1.0 py37_0
msgpack-python 0.6.1 py37hfd86e86_1
multipledispatch 0.6.0 py37_0
murmurhash 1.0.2 py37he6710b0_0
navigator-updater 0.2.1 py37_0
nbconvert 5.6.1 py37_0
nbformat 5.0.4 py_0
ncurses 6.2 he6710b0_0
networkx 2.4 py_0
ninja 1.9.0 py37hfd86e86_0
nltk 3.4.5 py37_0
nose 1.3.7 py37_2
notebook 6.0.3 py37_0
numba 0.48.0 py37h0573a6f_0
numexpr 2.7.1 py37h423224d_0
numpy 1.18.1 py37h4f9e942_0
numpy-base 1.18.1 py37hde5b4d6_1
numpydoc 0.9.2 py_0
nvidia-ml-py3 7.352.0 py_0 fastai
olefile 0.46 py37_0
openpyxl 3.0.3 py_0
openssl 1.1.1d h7b6447c_4
packaging 20.1 py_0
pandas 1.0.1 py37h0573a6f_0
pandoc 2.2.3.2 0
pandocfilters 1.4.2 py37_1
pango 1.42.4 h049681c_0
parso 0.6.1 py_0
partd 1.1.0 py_0
patchelf 0.10 he6710b0_0
path 13.1.0 py37_0
path.py 12.4.0 0
pathlib2 2.3.5 py37_0
patsy 0.5.1 py37_0
pcre 8.43 he6710b0_0
pep8 1.7.1 py37_0
pexpect 4.8.0 py37_0
pickleshare 0.7.5 py37_0
pillow 7.0.0 py37hb39fc2d_0
pip 20.0.2 py37_1
pixman 0.38.0 h7b6447c_0
pkginfo 1.5.0.1 py37_0
plac 0.9.6 py37_0
pluggy 0.13.1 py37_0
ply 3.11 py37_0
preshed 2.0.1 py37he6710b0_0
prometheus_client 0.7.1 py_0
prompt_toolkit 3.0.3 py_0
psutil 5.6.7 py37h7b6447c_0
ptyprocess 0.6.0 py37_0
py 1.8.1 py_0
py-lief 0.9.0 py37h7725739_2
pycodestyle 2.5.0 py37_0
pycosat 0.6.3 py37h7b6447c_0
pycparser 2.19 py37_0
pycrypto 2.6.1 py37h14c3975_9
pycurl 7.43.0.5 py37h1ba5d50_0
pyflakes 2.1.1 py37_0
pygments 2.5.2 py_0
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pyodbc 4.0.30 py37he6710b0_0
pyopenssl 19.1.0 py37_0
pyparsing 2.4.6 py_0
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pyrsistent 0.15.7 py37h7b6447c_0
pysocks 1.7.1 py37_0
pytables 3.6.1 py37h71ec239_0
pytest 5.3.5 py37_0
pytest-arraydiff 0.3 py37h39e3cac_0
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pytest-openfiles 0.4.0 py_0
pytest-remotedata 0.3.2 py37_0
python 3.7.6 h0371630_2
python-dateutil 2.8.1 py_0
python-libarchive-c 2.8 py37_13
pytorch 1.3.1 cpu_py37h62f834f_0
pytz 2019.3 py_0
pywavelets 1.1.1 py37h7b6447c_0
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readline 7.0 h7b6447c_5
requests 2.22.0 py37_1
ripgrep 11.0.2 he32d670_0
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ruamel_yaml 0.15.87 py37h7b6447c_0
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secretstorage 3.1.2 py37_0
send2trash 1.5.0 py37_0
setuptools 45.2.0 py37_0
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singledispatch 3.4.0.3 py37_0
sip 4.19.8 py37hf484d3e_0
six 1.14.0 py37_0
snappy 1.1.7 hbae5bb6_3
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sortedcollections 1.1.2 py37_0
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soupsieve 1.9.5 py37_0
spacy 2.1.8 py37hc9558a2_0 fastai
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sphinxcontrib 1.0 py37_1
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sphinxcontrib-devhelp 1.0.1 py_0
sphinxcontrib-htmlhelp 1.0.2 py_0
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sqlite 3.31.1 h7b6447c_0
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