Python

https://www.python.org/
1991 Guido Van Rossum
hacker's favorite language

basic

python 실행	python (py)
python 종료	ctrl + D or `exit()`
python file 실행	`python sample.py`, `py sample.py`
python 버전 확인	`python -V`, `py -V`

pip(legacy)

curl -O https://bootstrap.pypa.io/get-pip.py
sudo python get-pip.py

pip commands

pip --help
pip list
pip install virtualenv
pip uninstall virtualenv

uv

https://github.com/astral-sh/uv
An extremely fast Python package installer and resolver, written in Rust
10-100x faster than pip
Drop-in replacement for pip, pip-tools, and virtualenv

install

# macOS and Linux
curl -LsSf https://astral.sh/uv/install.sh | sh

# Windows
powershell -c "irm https://astral.sh/uv/install.ps1 | iex"

# With pip
pip install uv

# With brew (macOS)
brew install uv

uv commands

# Install packages
uv pip install requests
uv pip install -r requirements.txt

# Create virtual environment
uv venv
uv venv venv  # with custom name

# Activate virtual environment
source .venv/bin/activate  # macOS/Linux
.venv\Scripts\activate     # Windows

# Install packages in virtual environment
uv pip install pandas numpy

# Freeze dependencies
uv pip freeze > requirements.txt

# Uninstall packages
uv pip uninstall requests

# List installed packages
uv pip list

# Sync dependencies (like pip-sync)
uv pip sync requirements.txt

uv features

Speed: 10-100x faster than pip
Disk space: Global cache to avoid re-downloading packages
Reliability: Written in Rust for memory safety
Compatibility: Drop-in replacement for pip commands
Resolution: Advanced dependency resolver

virtualenv (legacy)

closed env
virtualenv venv
source venv/bin/activate
deactivate

python3 (mac)

install brew
- https://brew.sh
install python3

brew install python3
virtualenv -p python3 venv3
source venv3/bin/activate

python -V
deactivate

mac

Python is not installed as a framework issue?
vi ~/.matplotlib/matplotlibrc

backend: TkAgg

파일

파일 열어서 한 줄씩 출력하기
결과 파일 생성하기
참고: https://docs.python.org/3/tutorial/inputoutput.html#reading-and-writing-files

문자열(String)

문자열 포함
문자열 위치
문자열 추출

list(array)

배열

scipy on windows

Unofficial Windows Binaries for Python Extension Packages
- http://www.lfd.uci.edu/~gohlke/pythonlibs/#scipy

ref

Python Style Guide(PEP8)
- https://peps.python.org/pep-0008/
- https://okdevtv.com/mib/python/pep8
생활코딩 Python & Ruby
- https://opentutorials.org/course/1750
Tutoiral Point Python
- https://www.tutorialspoint.com/python/
Python 10 tasks
- 10 things possible with Python
jupyter
- https://okdevtv.com/mib/python/jupyter
jupyter-server
- https://okdevtv.com/mib/python/jupyter-server
pyenv
- https://okdevtv.com/mib/python/pyenv
pandas
- https://okdevtv.com/mib/python/pandas
matplotlib
- https://okdevtv.com/mib/python/matplotlib
datetime
- https://okdevtv.com/mib/python/datetime