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jello

A command-line JSON processor using Python syntax. More information: https://github.com/kellyjonbrazil/jello.

• Pretty-print JSON or JSON-Lines data from stdin to stdout:
   
  cat {{file.json}} | jello
   
• Output a schema of JSON or JSON Lines data from stdin to stdout (useful for grep):
   
  cat {{file.json}} | jello -s
   
• Output all elements from arrays (or all the values from objects) in JSON or JSON-Lines data from stdin to stdout:
   
  cat {{file.json}} | jello -l
   
• Output the first element in JSON or JSON-Lines data from stdin to stdout:
   
  cat {{file.json}} | jello _[0]
   
• Output the value of a given key of each element in JSON or JSON-Lines data from stdin to stdout:
   
  cat {{file.json}} | jello '[i.{{key_name}} for i in _]'
   
• Output the value of multiple keys as a new JSON object (assuming the input JSON has the keys key_name and other_key_name):
   
  cat {{file.json}} | jello '{"{{my_new_key}}": _.{{key_name}}, "{{my_other_key}}": _.{{other_key_name}}}'
   
• Output the value of a given key to a string (and disable JSON output):
   
  cat {{file.json}} | jello -r '"{{some text}}: " + _.{{key_name}}'