Using subprocess module with curl command

Question

I'm getting the error: function' object is unsubscriptable when using the subprocess module with curl command.

cmd (subprocess.check_call ['curl -X POST -u "opt:gggguywqydfydwfh" ' + Url + 'job/%s/%s/promotion/' % (job, Num)]).

I am calling this using the function.

def cmd(sh):
  proc = subprocess.Popen(sh, shell=True, stderr=subprocess.PIPE, stdout=subprocess.PIPE).

Can anyone point out the problem?

Shelling out to curl instead of using a library like requests could be considered the problem. — chepner
– chepner, Commented Aug 16, 2015 at 18:22

Padraic Cunningham · Accepted Answer · 2015-08-19 08:43:06Z

4

You forgot the parens with check_call:

subprocess.check_call(["curl", "-X", "POST", "-u", "opt:gggguywqydfydwfh",Url + 'job/%s/%s/promotion/' % (job, Num)])

You are trying to subprocess.check_call[...

You are also passing it to your function, check_call returns the exit code so you are trying to pass 0 to your Popen call as sh which is going to fail.

If you actually want the output, forget the function and use check_output, you also need to pass a list of args:

out = subprocess.check_output(["curl", "-X", "POST", "-u", "opt:gggguywqydfydwfh", Url + 'job/%s/%s/promotion/' % (job, Num)])

Either way passing check_call to Popen is not the way to go

edited Aug 19, 2015 at 8:43

answered Aug 16, 2015 at 18:18

Padraic Cunningham

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3 Comments

augurar Over a year ago

Also, you should specify the command arguments as separate list elements: ['curl', '-X', 'POST', ... ].

Ben Beirut Over a year ago

typo: subprocess.check_output

Padraic Cunningham Over a year ago

@augurar, yes, did not realise they weren't.

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