모듈 일괄 설치
$pip freeze > {path}\{file_name}.txt
@ file 형태로 저장되는 경우
ex) conda-build @ file:///C:/b/abs_...
pip list --format=freeze > {path}\{file_name}.txt
$pip install -r {path}\{file_name}.txt
한 줄씩 설치
Get-Content requirements.txt | ForEach-Object { pip install $_ }
$pip install -r {path}\requirements.txt