Docker 내 Python version upgrade

1. apt-get update

-> error

W: GPG error: https://developer.download.nvidia.com/compute/cuda/repos/ubuntu1804/x86_64  InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY A4B469963BF863CC
E: The repository 'https://developer.download.nvidia.com/compute/cuda/repos/ubuntu1804/x86_64  InRelease' is not signed.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.

 

-> solution

apt-key del 7fa2af80
apt-key adv --fetch-keys http://developer.download.nvidia.com/compute/cuda/repos/ubuntu1604/x86_64/3bf863cc.pub

 

2. Download python

wget https://www.python.org/ftp/python/3.8.6/Python-3.8.6.tgz
tar -xvf Python-3.8.6.tgz
cd Python-3.8.6

 

3. configure

./configure --enable-optimizations
make install

 

4.link

//update-alternatives --install <prev python path> python <new python path> 1
update-alternatives --install /opt/conda/bin/python python /usr/local/bin/python3.8 1

 

5. update pip

python -m pip install --upgrade pip

 

6. Version check

which python
// which python3