cURL command with parameters returned by python -c "python code here" command

Question

I have this command

curl http://localhost:6800/schedule.json | python -c "import json; print (' '.join(['-d '+key+'='+word for key,word in json.load(open('cron_parameters_testing.json')).items() ] ))"

actually the python command reads parameters from JSON file like this

{ 'project' : 'default' }

and returns the output as -d project=default

I have separately tested python -c "import json; print (' '.join(['-d '+key+'='+word for key,word in json.load(open('cron_parameters_testing.json')).items() ] )) command it works perfectly but it does work with the cURL

my final command that I want to run is

curl http://localhost:6800/schedule.json -d project=default

of course I want -d project=default to be generated from command I mentioned

Alex Hall · Accepted Answer · 2016-12-22 11:38:03Z

1

| is a pipe, in your case it sends standard output from curl to become the standard input to python. This seems unrelated to your task. Try:

curl http://localhost:6800/schedule.json `python -c "import json; print (' '.join(['-d '+key+'='+word for key,word in json.load(open('cron_parameters_testing.json')).items() ] ))"`

The backticks (`...`) evaluate the command inside and get substituted with the output of the command. Alternatively you can use $(...), especially if you need to nest commands like this.

answered Dec 22, 2016 at 11:38

Alex Hall

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3 Comments

Umair Ayub Over a year ago

in my Ubuntu 14 in VMWare that command works ... but I have a live server with same Ubuntu 14 it does not work ... gives error TypeError: coercing to Unicode: need string or buffer, bool found

Alex Hall Over a year ago

@Umair That's purely a python error, thought I can't see what would cause it. What are the outputs of python --version on both machines? Are the JSON files exactly the same? Are there any non-strings in the JSON file(s)?

Umair Ayub Over a year ago

Yeah, file's content was different

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