CODEWITHSUNDEEP
pythonbashjenkinsboto3
Samuel Rodriguez
Samuel Rodriguez

Reputation: 51

Send a parameter from bash to a python script

I'm trying to send a parameter on jenkins and have the parameter recognized on the a python file.

Is there a command where I could do this on bash:

param = "Hello World"
param -> /usr/green/test.py

Also how does the py file know to grab the parameter?

Upvotes: 1

Views: 9598

Answers (4)

ntj
ntj

Reputation: 171

One solution would be to print the parameter and process through a pipe with python.

Like:

read.py:

#!/usr/bin/python

import sys

pythonparams = sys.stdin.read()

# do something

then

echo "$param"|./read.py

Upvotes: 0

Erich
Erich

Reputation: 36

You have to put the script's arguments after the file path separated by spaces, like this:

/usr/green/test.py arg1 arg2 arg3

to pass the value of a bash variable to the script, you have to prefix the variable name with a $ (dollar sign):

param="Hello world"
/usr/green/test.py "$param"

The list of arguments in the python script can be accessed with sys.argv. The first element in the list is the path to the script therefore the second element is the first argument.

Example /usr/green/test.py (Python 3):

import sys

print(sys.argv[1])

bash input:

param="Hello World"
python3 /usr/green/test.py "$param"

bash output:

Hello World

Note: You have to put the variable name in quotes or Hello and World will be passed as two separate arguments to test.py.

To execute the script without the python command, you can add a #! (shebang) line:

#!/usr/bin/python3

import sys

print(sys.argv[1])

Make the script executable by typing in bash:

chmod +x /usr/green/test.py

Upvotes: 0

Manmohan_singh
Manmohan_singh

Reputation: 1804

you can pass parameters from BASH to you python script via using sys egg in the python scripts. then pass on the environment variables in the command .

PyScript 

import sys

print 'Number of arguments:', len(sys.argv), 'arguments.'
print 'Argument List:', str(sys.argv)

command in BASH : 

$python test.py $BUILD_ID $BUILD_URL

output : 

Number of arguments: 2 arguments.
Argument List: ['test.py', '107', 'http://0.0.0.0:8080/artefact/builds/24']

Upvotes: 4

ryche
ryche

Reputation: 2094

You can access parameters passed to the script this way:

import sys

print sys.argv[1]

~ python test.py 'hello world'

Upvotes: 3

Related Questions