key value 2

import argparse,os,json,tempfile

def wd(my_dict, key, val):
    if key in my_dict:
        try:
            my_dict[key].append(val)
        except AttributeError:
            my_dict[key]= [my_dict[key],val]
    else:
        my_dict[key] = val

parser = argparse.ArgumentParser()
parser.add_argument("-key","--key",   help = ' random text')
parser.add_argument("-val","--val",required=False,  help = 'random_text')
args = parser.parse_args()

storage_path = os.path.join(tempfile.gettempdir(), 'storage.data')

if os.path.isfile('/tmp/storage.data') == True:
    #print ('file  exsist!')

    if args.val:
        with open('/tmp/storage.data', 'r') as f:
            m = json.load(f)
            wd(m,args.key,args.val)
        with open('/tmp/storage.data', 'w') as f:
            json.dump(m, f)

    else:
        try:
            with open('/tmp/storage.data', 'r') as f:
                #print('only key')
                m = json.load(f)
                if m[args.key] is not list:
                    #print('val is list',type(m[args.key]))
                    print(', '.join(m[args.key]))
                else:
                    #print('val is not list',type(m[args.key]))
                    print(m[args.key])
        except:
            print(None)
else:
    dicti = {}
    with open('/tmp/storage.data', 'w') as f:
        json.dump(dicti,f)
    #print('create clear dict')
    with open('/tmp/storage.data', 'r') as f:
        m = json.load(f)
        wd(m, args.key, args.val)
    #print('read file')
    with open('/tmp/storage.data', 'w') as f:
        json.dump(m, f)
    #print('dump done')
    if args.val is None:
        print(None)