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#!/usr/bin/env python
# -*- coding: utf-8 -*-

from subprocess import Popen, PIPE
from collections import defaultdict

SENSORS_CMD = 'sensors'
SENSORS_ARGS = ['-u']

def parse_sensors(sensors_cmd=SENSORS_CMD, sensors_args=None):
    '''opens a sensors process with subprocess and returns
    a dict with the parsed stdout.
    sensors_args must be None or a list, which contains the
    arguments for the sensors process.'''
    if sensors_args is None:
        sensors_args = SENSORS_ARGS
    elif not '-u' in sensors_args:
        sensors_args.append('-u')
    stdout, stderr = Popen([sensors_cmd] + sensors_args, stdout=PIPE,
                           universal_newlines=True).communicate()
    return parse_sensors_stdout(stdout)
                           

def parse_sensors_stdout(sensors_stdout):
    '''parses the stdout of a sensors process called with the
    -u argument'''
    parsed_stdout = [b.splitlines() for b in
                     sensors_stdout.strip().split('\n\n')]
    pd = defaultdict(lambda:defaultdict(dict))
    
    for block in parsed_stdout:
        key = block.pop(0)
        for line in block:
            if not ':' in line:
                pass
            elif line.endswith(':'):
                name = line[:-1]
            elif not line.startswith(' '):
                name, value = line.split(': ')
                pd[key][name] = value
            else:
                type_, value = line.strip().split(': ')
                pd[key][name][type_.partition('_')[2]] = value

    return dict([(k, dict(v)) for k, v in pd.iteritems()])

if __name__ == '__main__':
    from pprint import pprint
    pprint(parse_sensors())