EXAMPLES.rst

Examples

This file enumerates some common patterns for working with jsonpipe output. The examples here use the file example.json, which can be found in the root of this repo. Basic familiarity with the UNIX shell, common utilities and regular expressions is assumed.

Simple Selection

In Python:

>>> json[12]['user']['screen_name']
u"ManiacasCarlos"

On the command-line, just grep for the specific path you're looking for:

$ jsonpipe < example.json | grep -P '^/12/user/screen_name\t'
/12/user/screen_name        "ManiacasCarlos"

The pattern used here is terminated with \t, because otherwise we'd get sub-components of the screen_name path if it were an object, and we'd also pick up any keys which started with the string screen_name (so we might get screen_name_123 and screen_name_abc if those keys existed).

Extracting Entire Objects

In Python:

>>> json[12]['user']
{... u'screen_name': u'ManiacasCarlos', ...}

On the command-line, grep for the path again but terminate with / instead of \t:

$ jsonpipe < example.json | grep -P '^/12/user/'
...
/12/user/profile_use_background_image       true
/12/user/protected  false
/12/user/screen_name        "ManiacasCarlos"
/12/user/show_all_inline_media      false
...

You can also filter for either a simple value or an entire object by terminating the pattern with a character range:

$ jsonpipe < example.json | grep -P '^/12/user[/\t]'
/12/user    {}
/12/user/contributors_enabled       false
/12/user/created_at "Mon Jan 31 20:42:31 +0000 2011"
/12/user/default_profile    false
...

Searching Based on Equality or Patterns

Find users with a screen name beginning with a lowercase 'm':

$ jsonpipe < example.json | grep -P '/user/screen_name\t"m'
/0/user/screen_name "milenemagnus_"
/11/user/screen_name        "mommiepreneur"
/14/user/screen_name        "mantegavoadora"