How do I pass arguments to a script piped to the Python interpreter on stdin?

Question

I'm installing poetry using the get-poetry.py script, and I want to specify the version to install. To install the latest version I do

GET_POETRY_URL=https://raw.githubusercontent.com/python-poetry/poetry/master/get-poetry.py
curl -sSL $GET_POETRY_URL | python

The get-poetry.py script takes an argument --version, but how do I pass that through?

curl -sSL $GET_POETRY_URL | python --version 1.1.4

prints the installed python version, rather than passing the argument through to the get-poetry.py script. I could save the script to a file and call it that way, but I'm doing this in a docker image and I don't want to deal with cleaning it up afterwards.

Blaine Rogers · Accepted Answer · 2020-12-09 15:45:52Z

3

curl -sSL $GET_POETRY_URL | python - --version 1.1.4

Using - as the script location when you call python will cause it to read from stdin. As usual, any arguments after the script location are passed to the script:

$ echo "import sys; print(sys.argv)" | python - --version 1.1.4
['-', '--version', '1.1.4']

Using - to mean stdin also works for many other unix tools:

$ echo hello | cat -
hello

answered Dec 9, 2020 at 15:45

Blaine Rogers

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