1.
Python
1

2.
5,6
pyenv virtualenv Python
pyenv-virtualenv
2

3.
3

4.
• SysML
• pyenv-virtualenv
• Python
4
@cocodrips

5.
Python 3STEP

6.
1. Python
2.
3.
6
Python 3STEP

7.
Python
•
‣ : ProjectA: Python >= 3.6
ProjectB: Python >= 3.5
• pyenv
7

8.
•
‣ :
ProjectA: Tensorflow == 1.15.0
ProjectB: Tensorflow >= 2.1.0
• app docker
8

9.
•
‣ pip
requirements.txt
‣ pip freeze
‣
requirements/dev.txt — autopep8 / flake8 …
requirements/tests.txt — pytest …
requirements/prod.txt
•
9

10.
Python

11.
pip
• PyPI Python
•
pip freeze > requirements.txt
11
O

12.
venv
• Python3.3
python3 -m venv /path/to/environment
• activate ( )
source /path/to/environment/bin/activate
12
O

13.
3rdParty

14.
pyenv
•
‣ — pyenv install 3.8.1
‣ — pyenv local 3.8.1
•
• (3.8.1)
14
O

15.
pipenv
•
• requirements.txt Pipfile / Pipfile.lock
‣ npm / bundler
‣ requirements.txt
• Pipfile Python (PEP)
15
O
O

16.
pipenv
•
‣ pipenv —python <python path>
• activate (shell )
‣ pipenv shell
16
O
O

17.
pipenv
• pipenv
‣ Pipfile
pipenv install requirements
‣
pipenv install —dev autopep8
‣ Pipfile.lock
pipenv sync
‣ pipfile
pipenv install
17
O
O

18.
poetry
• Python project.toml
• setup.py
• npm / bundler poetry.lock
•
18
O
O

19.
poetry
19
O
O

20.
poetry
• poetry
‣ ( ) — pyproject.toml
poetry new < >
• activate
‣ poetry shell
•
‣
pyenv local new, install ( pipenv )
20
O
O

21.
poetry
• poetry
‣ pyproject.toml
poetry add requirements
‣
poetry add —dev autopep8
‣ pyproject.tml
poetry install
‣
poetry build
21
O
O

22.
( ) Anaconda
• STEP
•
•
22
O
O
O

23.
( )
pyenv-virtualenv
• activate
•
pyenv virtualenv < > <env >
• activate
pyenv local <env >
23
O
O

24.
Python Before ——> After

25.
(before) pyenv-virtualenv + pip
• activate
( )
• (tf2), (tf1)
• …
25

26.
(after) pyenv + poetry
•
pyenv
•
‣ python
‣
• pipenv
•
pip pipenv / poetry
26

27.
28
2020 Python - Qiita

28.
• Pipfile → pipenv
• requirements.txt → pip + venv
• PyPI → poetry
• →
• — → pip+venv / pipenv
29