字典转字符串

笨方法！

l = []
dic = {'宝马': {'price': '120000', 'num': '3'},
       '奔驰': {'price': '150000', 'num': '7'},
       '奥迪': {'price': '100000', 'num': '8'}}
for i in dic:
    l_test = list(dic[i].keys())
    x = '%s %s %s' % (i, dic[i][l_test[0]], dic[i][l_test[1]])
    l.append(x)
x1 = '
'.join(l)
print(x1)
run==>

宝马 120000 3
奔驰 150000 7
奥迪 100000 8

聪明方法！

dic = {'宝马': {'price': '120000', 'num': '3'},
       '奔驰': {'price': '150000', 'num': '7'},
       '奥迪': {'price': '100000', 'num': '8'}}

for k, v in dic.items():
       line = k + ' '
       line += v['price'] + ' '
       line += v['num'] + '
'
       print(line)

run==>
宝马 120000 3
奔驰 150000 7
奥迪 100000 8