Python - python a java

# python3

import sys

class Query:

    def __init__(self, query):

        self.type = query[0]

        self.number = int(query[1])

        if self.type == 'add':

            self.name = query[2]

def read_queries():

    n = int(input())

    return [Query(input().split()) for i in range(n)]

def write_responses(result):

    print('\n'.join(result))

def process_queries(queries):

    result = []

    contacts = [None] * (10**7)

    for cur_query in queries:

        if cur_query.type == 'add':

            contacts[cur_query.number] = cur_query.name

        elif cur_query.type == 'del':

            contacts[cur_query.number] = None

        else:

            response = 'not found'

            if contacts[cur_query.number] != None:

                response = contacts[cur_query.number]

            result.append(response)

    return result

if __name__ == '__main__':

    write_responses(process_queries(read_queries()))