中国大学MOOC·北京理工大学·大数据基础与应用——第四周单元测试答案

     m = [1, 2, [3]]
    
    2.     n = m[:] 
    
    3.     n[1] = 4 
    
    4.     n[2][0] = 5 
    
    5.     print(m)
    
    
      
      
      
      
      
      
      
      
      
    
    AI写代码

     n1 = { 'a':1, 'b':2 }
    
    2.     n2 = n1
    
    3.     n1['a'] = 5
    
    4.     s = n1['a'] + n2['a']
    
    5.     print(s)
    
    
      
      
      
      
      
      
      
      
      
    
    AI写代码

     import sqlite3
    
    2.     from faker import Faker
    
    3.     f=Faker("zh_cn")
    
    4.     conn=sqlite3.connect(":memory:")
    
    5.     c=conn.cursor()
    
    6.     c.execute("create table user (id varchar(10) primary key, name varchar(20))")
    
    7.     for i in range(0,100):
    
    8.               c.execute("insert into user (id, name) values ('{}','{}')".format(i,f.name()))
    
    9.     c.execute("select * from user")
    
    10.  result = c.fetchall()
    
    11.  print(len(result))
    
    
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
    
    AI写代码