I have runned: pip install pytorch-lightning, but get error: No module named pytorch_lightning

[muyuuuu]

python: 3.8.8
pytorch: 1.7.0
pytorch-lightning: 1.5.8
windows 10 and anaconda 4.11.0

[akihironitta]

Duplicate of #11498.
Duplicate of #11499.

[rohitgr7]

maybe your pip is not referencing to the python installed on your system.
Either try using an env like conda or virtualenv
or install lightning using

python -m pip install pytorch-lightning
python train.py

[muyuuuu]

Some error: D:\users\anaconda3\python.exe: No module named pip.main; pip is a package and cannot be directly executed.

[rohitgr7]

yes, that means pip isn't installed for your python which you are using to execute the script and pip installation you used to install must be referring to something else.

can you post?

which pip
which python

also try to reinstall python or better I'd recommend using envs.

[muyuuuu]

emmm, I use conda to create a new virtual env, and pip install in env, this problem has been solved. thank you.

[saju8652]

@muyuuuu can you tell me how your problem got solved?

[muyuuuu]

here is pip list