I want to pass multiple arguments to python script from bash script

Question

I have a python script that takes some inputs as arguments. I bash script I want to provide those inputs. here is the input syntax :

usage: 0ドル <virtualenv-dir>
 <cairo-dir>
 <file-path>
 [--server <es-server>]
 [--port <es-port>]
 [--fields <columns to be uploaded. Comma separated list of columns]
 [--filter <ES filter to use>]
 [--from-time <start time>]
 [--to-time <end time>]
 [--timestamp-field <name-of-timestamp-column>]
 <index-name> 
 <recipients-separated-by-comma>
 <output-file-name>

I want to learn how to assign these inputs to variable in a bash script and pass the variables to python script.

I tried these :

VIRTUAL_ENV=1ドル
CAIRO=2ドル
PYTHON_FILE_SCRIPT=3ドル
INDEX=4ドル
MAIL_LIST=5ドル
FILE_OUTPUT=6ドル
shift
shift
# Activate virtual environment
source $VIRTUAL_ENV/bin/activate
# Set PYTHONPATH
export PYTHONPATH=$UBUNTU
cd $UBUNTU
# a cronjob to collect the data from the device
python 3ドル 4ドル 5ドル 6ドル

• Amadan: As long as there are no spaces in variables this should be okay (though that is not to be relied upon, you should always quote variable use in bash scripts: VIRTUAL_ENV="1ドル", cd "$UBUNTU", python "3ドル" "4ドル" "5ドル" "6ドル"...). When you "tried these", what problem did you encounter?
• Smruti Sahoo: @Amadan whatever I give input for <recipients-separated-by-comma> give ing me error python: can't open file '[email protected]': [Errno 2] No such file or directory
• Adam Smith: Are you trying to parse your input for those optional fields? You seem to make no attempt to do that here.
• Smruti Sahoo: @AdamSmith How to do that?
• Adam Smith: @SmrutiSahoo I bet [email protected] is the second address in the list. Since you don't quote the input, there's no way of knowing that [email protected], [email protected] outputfile.txt is supposed to be two email addresses separated by a comma or one email address (ending in a comma) followed by an outputfile named [email protected] .

Answer 1

The python command seems incorrect: you already called shift, so 3ドル, which is the python script, is now 1ドル.

Replace the last line with

python "$PYTHON_FILE_SCRIPT" "$INDEX" "$MAIL_LIST" "$FILE_OUTPUT"

and you should be just fine.

If you want to perform options parsing, I would suggest you use a while loop and shift arguments while parsing. You can use a case to match options easily. Example:

VIRTUAL_ENV="1ドル"
CAIRO="2ドル"
PYTHON_FILE_SCRIPT="3ドル"
while true; do
 case "1ドル" in
 --server)
 SERVER="2ドル"
 shift 2
 ;;
 --port)
 PORT="2ドル"
 shift 2
 ;;
# add other cases
 *)
 break
 ;;
 esac
dome
INDEX=4ドル
MAIL_LIST=5ドル
FILE_OUTPUT=6ドル
# then do what you need to do