`dict1={'name':'Lara','age':18}

判断键在不在字典中

for one in dict1:
if 'name' in dict1:#或dict1.keys()
print('key在字典中！')
break

判断值在不在字典中

for one in dict1:
if 'Lara' in dict1.values():
print('value在字典中！')
break`