In [170]:

    

# Author: Jason Lu
import pymongo
from threading import Thread, Lock


class ManagerDBMongo(object):
    
    _instance_lock = Lock() # 定义锁
    _ip = ''
    _port = 27017
    _db = ''
    _col = ''
    _client = []
    
    def __new__(cls, *args, **kwargs):
        if not hasattr(ManagerDBMongo, "_instance"):
            with ManagerDBMongo._instance_lock:
                if not hasattr(ManagerDBMongo, "_instance"):
                    ManagerDBMongo._instance = object.__new__(cls)
                    
        return ManagerDBMongo._instance
        
    @classmethod
    def init_db(cls, ip='localhost', port=27017, db_name=None, db_collection=None):
        cls._ip = ip
        cls._port = port
        cls._client = pymongo.MongoClient(cls._ip, cls._port)
        
        print("1111")
        if db_name is None:
            return False
        
        if db_collection is None:
            return False
        
        cls._db = cls._client[db_name]
        cls._col = cls._db[db_collection]
            
        print(">>:finish init database")
        return True

    
    @classmethod
    def get_collection(cls, col):
        return cls._db[col]


    

In [171]:

    

ManagerDBMongo.init_db(db_name="mydatabase", db_collection="users")
collection_users = ManagerDBMongo.get_collection("users")
print(collection_users)

# obj1 = ManagerDBMongo.init_ip_port()

# print(ManagerDBMongo.get_ip_port())
# ManagerDBMongo.init_db_collection(ManagerDBMongo, "mydatabase", "users")


    

    




1111
>>:finish init database
Collection(Database(MongoClient(host=['localhost:27017'], document_class=dict, tz_aware=False, connect=True), 'mydatabase'), 'users')

In [5]:

    

a = list(map(int, input().split()))
b = int(input())
sum = 0

for i in a:
    if b+30 >= i:
        sum+=1

print(sum)


    

    




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100
2

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