import operator
import psutil

## output format: cpu_usage{process="cadvisor", pid="123"} 15.0
def process_list():
    procs = []
    procs_lists=[]
    procs_lists2=[]
    procs_status = {}
    cnt=False
    while True:
        for p in psutil.process_iter():
            try:
                p.dict = p.as_dict(['username', 'nice', 'memory_info',
                                    'memory_percent', 'cpu_percent',
                                    'cpu_times', 'name', 'status','pid'])
                try:
                    procs_status[p.dict['status']] += 1
                except KeyError:
                    procs_status[p.dict['status']] = 1
            except psutil.NoSuchProcess:
                pass
            else:
                procs.append(p)
        for a in procs:
            if a.dict['cpu_percent'] is not None and a.dict['cpu_percent'] != 0.0:
                cnt=True
                procs_lists.append({'process_name':a.dict['name'],'pid':a.dict['pid'],'cpu':float(a.dict['cpu_percent'])})
        if cnt is True:
            temp = {}
            for d in procs_lists:
                if d['process_name'] not in temp:
                    temp[d['process_name']] = {}
                temp_d = temp[d['process_name']]
                temp_d['cpu'] = temp_d.get('cpu', 0) + float(d['cpu'])

            for a,key in temp.items():
                procs_lists2.append({'process_name':a,'cpu_load':key['cpu']})
            procs_lists2.sort(key=operator.itemgetter('cpu_load'),reverse=True)
            for c in procs_lists2:
                print('cpu_usage{process_name="%s"} %1.1f'%(c['process_name'],c['cpu_load']))
            break
    return 0

if __name__ == '__main__':
    process_list()