CODEWITHSUNDEEP
python
Hitman47
Hitman47

Reputation: 25

How can I pass arguments to a python script being fed to the interpreter on stdin?

I have a bash script which exports two auxiliary python scripts, using heredoc with " ", and executes them from /tmp.

It works fine, but when i deployed this script on a server which has automatic /tmp cleanup, it will always delete the exported python scripts after a while.

Moreover, I can not manually copy the needed python scripts to the server, only this script executes.

an idea came to me

Right now I export the scripts like this

cat << "SCRIPT" > /tmp/script.py && chmod +x /tmp/script.py

And then execute them with an argument

I tried doing it like this

python << "SCRIPT"

The script runs, but it doesn't take arguemnts. I tried quoting and using xargs.

Is there any way to pass arguments to scripts executed like this?

Upvotes: 0

Views: 801

Answers (1)

Charles Duffy
Charles Duffy

Reputation: 295363

Pass the Python interpreter - as the filename you want it to read code from, when you want it to get code from stdin. Thus:

python - "argument one" "argument two" "argument three" <<'EOF'
import sys, pprint
pprint.pprint(sys.argv)
EOF

...properly emits:

['-', 'argument one', 'argument two', 'argument three']

Another way to pass code into a Python interpreter is on the command line:

pyscript=$(cat <<'EOF'
import sys, pprint
pprint.pprint(sys.argv)
EOF
)

python -c "$pyscript" "argument one" "argument two" "argument three"

...which will have slightly different output:

['-c', 'argument one', 'argument two', 'argument three']

Upvotes: 2

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