python subprocess output to an array

Question

Can someone tell me how to get the output of the following command using subprocess to a list please?

curl --silent -u username:password http://localhost:55672/api/queues | sed 's/,/\n/g' | grep '"name"\:' | tr -d "name:" | tr -d -d \"

Tried "subprocess.popen", "subprocess.call" and "subprocess.popen" but to no avail. Below is one example i tried.

import json
import subprocess

HO=subprocess.check_output("curl --silent -u username:passwordhttp://localhost:55672/api/queues | sed 's/,/\n/g' | grep '"name"\:' | tr -d "name:" | tr -d -d \"", shell=True)

print HO

The error that is thrown at me when the latter is run

 File "./rb.py", line 10
    HO=subprocess.check_output("curl --silent -u username:password http://localhost:55672/api/queues | sed 's/,/\n/g' | grep '"name"\:' | tr -d "name:" | tr -d -d \"", shell=True)
                                                                                                                                     ^
SyntaxError: invalid syntax
[my_shell]bindo@test1:~/rbmq_test $

Please note that the command is working when it is run on the shell and generates an output in below format

line1
line2
line3

Please can someone help?

GiovaniSalazar · Accepted Answer · 2019-12-19 17:54:13Z

1

Probably is late , but this can be useful:

import subprocess

# cmd contains shell command
cmd="curl --silent -u username:passwordhttp://localhost:55672/api/queues | sed 's/,/\n/g' | grep '"name"\:' | tr -d "name:" | tr -d -d \""

process = subprocess.Popen(cmd,shell=True,stdin=None,stdout=subprocess.PIPE,stderr=subprocess.PIPE)
# The output from your shell command
result=process.stdout.readlines()
if len(result) >= 1:
    for line in result:
        print(line.decode("utf-8"))

answered Dec 19, 2019 at 17:54

GiovaniSalazar

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Comments

Hamuel · Accepted Answer · 2017-07-19 14:12:03Z

0

Look like the command have a lot of forbidden characters you need to escape maybe you can try the following

cmd = """
curl --silent -u username:password http://localhost:55672/api/queues | sed 's/,/\n/g' | grep '"name"\:' | tr -d "name:" | tr -d -d \"
"""
subprocess.check_output(cmd)

answered Jul 19, 2017 at 14:12

Hamuel

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2 Comments

JohanL Over a year ago

This requires shell=True in the check_output() call.

bindo Over a year ago

@Hamuel thanks but the said code didn't resolve my problem.

dfranca · Accepted Answer · 2017-07-19 14:14:35Z

0

You are quoting around the "name" seems to be wrong.

You are closing the double quoted string, that's why you are getting an invalid syntax, nothing related to the command itself.

Try adding an escape character before the quotes around name.

subprocess.check_output("curl --silent -u username:passwordhttp://localhost:55672/api/queues | sed 's/,/\n/g' | grep \"name\":' | tr -d \"name:\" | tr -d -d \"", shell=True)

Or replacing the double quote with single ones, this way you don't conflict with the command string:

subprocess.check_output("curl --silent -u username:passwordhttp://localhost:55672/api/queues | sed 's/,/\n/g' | grep 'name':' | tr -d 'name:' | tr -d -d \"", shell=True)

Based on the command line you posted first it seems that you need the double quoted one in the grep, so you need to escape it:

subprocess.check_output("curl --silent -u username:passwordhttp://localhost:55672/api/queues | sed 's/,/\n/g' | grep '\"name\"':' | tr -d 'name:' | tr -d -d \"", shell=True)

answered Jul 19, 2017 at 14:14

dfranca

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1 Comment

bindo Over a year ago

thanks but unfortunately still no luck with the suggested options. :(

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