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pyenv の導入の巻

Last updated at Posted at 2018-07-18

#目的
Pythonの2系と3系を使って開発を進めたい

#目標
pyenv を導入して、2系と3系を切り替えて使う
今回は、GCP CentOS7 にはデフォルトでpython2 系が入っているため、pyenv へ python 3 を導入する

#作業
##ライブラリの更新
sudo yum -y update

##git と pyenv 前提ソフトの導入
sudo yum -y install gcc wget curl-devel expat-devel gettext-devel openssl-devel zlib-devel perl-ExtUtils-MakeMaker autoconf bzip2 bzip2-devel libbz2-dev openssl openssl-devel readline readline-devel

##git を導入
下のサイトを参照
https://qiita.com/hatakkkk/items/c06dd493d0fc96f7468d

これを入力するんだ
wget https://www.kernel.org/pub/software/scm/git/git-2.9.5.tar.gz

tar vfx git-2.9.5.tar.gz

cd git-2.9.5

make configure

./configure --prefix=/usr

make all

sudo make install

##pyenv の導入
https://github.com/pyenv/pyenv-installer

下のコマンドを入力するんだ
curl -L https://github.com/pyenv/pyenv-installer/raw/master/bin/pyenv-installer | bash
echo 'export PATH="$HOME/.pyenv/bin:$PATH"' >> ~/.bashrc
echo 'eval "$(pyenv init -)"' >> ~/.bashrc
echo 'eval "$(pyenv virtualenv-init -)"' >> ~/.bashrc
source .bash_profile

導入できたか確認する
pyenv -v

pyenv 1.2.6

pyenv を更新する
pyenv update

一旦、VM の再起動
sodo reboot

python の導入可能ver を確認する
pyenv install --list

今回は、3.6.6 を導入
pyenv install 3.6.6

pyenv のリフレッシュ
pyenv rehash

現行のpython ver を表示
python --version

Python 2.7.5

3.代を使いたいので、導入した python 3.6.6 へ変更する。
pyenv global 3.6.6

再度、python ver を確認
python --version

Python 3.6.6

これで完了!
お疲れ様でした。

#Tips

warning 出た

Downloading Python-3.6.6.tar.xz...
-> https://www.python.org/ftp/python/3.6.6/Python-3.6.6.tar.xz
Installing Python-3.6.6...
WARNING: The Python bz2 extension was not compiled. Missing the bzip2 lib?
WARNING: The Python readline extension was not compiled. Missing the GNU readline lib?
WARNING: The Python sqlite3 extension was not compiled. Missing the SQLite3 lib?
Installed Python-3.6.6 to /home/h1d34h4t/.pyenv/versions/3.6.6

必要なものをインストールして完了。
sudo yum -y install bzip2 bzip2-devel libbz2-dev openssl openssl-devel readline readline-devel

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