dict1={"name":"howhy","age":12,"gender":"man"}
newdict=dict1.setdefault("name","ssss")
print(newdict,dict1)##howhy {'name': 'howhy', 'age': 12, 'gender': 'man'}
newdict=dict1.setdefault("email","ssss")
print(newdict,dict1)##ssss {'name': 'howhy', 'age': 12, 'gender': 'man', 'email': 'ssss'}
dict1.update({"email":"492342@qq.com"})
dict1.update(addr="广东深圳")
dict1.update([("qq","343243244"),])
dict1.update((("phone","13534545334344"),))
print(dict1)##{'name': 'howhy', 'age': 12, 'gender': 'man', 'email': '492342@qq.com', 'addr': '广东深圳', 'qq': '343243244', 'phone': '13534545334344'}