Python nested dictonaries

Question

{'140508921-1183337': {'COVERAGE_PILLAR': nan,
  'HARDWARE_PILLAR': nan,
  'SECURITY_PILLAR': nan,
  'SOFTWARE_PILLAR': nan},
 'PSS_13240-1451364': {'COVERAGE_PILLAR': 10.0,
  'HARDWARE_PILLAR': 25.0,
  'SECURITY_PILLAR': 55.0,
  'SOFTWARE_PILLAR': 10.0}
}

want to remove keys which has nan values . such as '140508921-1183337''should be removed as its keys/values pairs null

Answer 1

If a is the dictionary do this:

a={'140508921-1183337': {'COVERAGE_PILLAR': 'nan', 'HARDWARE_PILLAR': 'nan', 'SECURITY_PILLAR':'nan', 'SOFTWARE_PILLAR': 'nan'}, 'PSS_13240-1451364': {'COVERAGE_PILLAR': 10.0, 'HARDWARE_PILLAR': 25.0, 'SECURITY_PILLAR': 55.0, 'SOFTWARE_PILLAR': 10.0}}


def remove_keys_with_nan(item):
    if not hasattr(item, 'items'):
        return item
    else:
        d = {key: remove_keys_with_nan(value) for key, value in item.iteritems() if value is not 'nan'}
        return dict((k, v) for k, v in d.iteritems() if v)

a = remove_keys_with_nan(a)

print(a)

Result:

{'PSS_13240-1451364': {'COVERAGE_PILLAR': 10.0, 'HARDWARE_PILLAR': 25.0, 'SOFTWARE_PILLAR': 10.0, 'SECURITY_PILLAR': 55.0}}

EDIT-new answer to your new question

use:

import numpy as np

nan = np.nan

a={'140508921-1183337': {'COVERAGE_PILLAR': nan, 'HARDWARE_PILLAR': nan, 'SECURITY_PILLAR': nan, 'SOFTWARE_PILLAR': nan}, 'PSS_13240-1451364': {'COVERAGE_PILLAR': 10.0, 'HARDWARE_PILLAR': 25.0, 'SECURITY_PILLAR': 55.0, 'SOFTWARE_PILLAR': 10.0}}

and then the same code as previously.