import sys
import yaml

if len(sys.argv)>1:
    infile=sys.argv[1]
    print(infile)

yfile='list.yaml'
with open(yfile) as f: c=yaml.load(f,Loader=yaml.FullLoader)

def jprint(s,t=''):
    for k,v in s.items():
        if type(v)==type({}):
            print(t+k+":")
            jprint(v,t+"    ")
        else:
            print(t+str(k)+":",v)

jprint(c)