temp_list = [‘sun‘,‘sha‘,‘zhu‘]

name_list = []

name_list.extend(temp_list)

print(name_list)

temp_list = [‘sun‘,‘sha‘,‘zhu‘,‘sun‘]

name_list = []

name_list.extend(temp_list)

print(name_list.count(‘sun‘))

dic_xiaoming = {‘name‘:‘小明‘,"age":10}
# 1、统计键值对数量
print("字典长度为："+str(len(dic_xiaoming)))

# 2、合并字典
temp_dic = {‘height‘:1.75,‘age‘:18}
# 注意如果被合并的字典中包含已经存在的键值对，会覆盖原来的键值对
dic_xiaoming.update(temp_dic)
print("合并后的字典"+str(dic_xiaoming))

# 3、清除字典
dic_xiaoming.clear()
print("clear后的字典"+str(dic_xiaoming))

dic_xiaoming = {‘name‘:‘小明‘,"age":10,"qq":‘12221212‘}
‘‘‘
for循环取的是k,通过k获取value的值
‘‘‘
for k in  dic_xiaoming:
    print("%s ： %s"%(k,dic_xiaoming[k]))

a = 1
print(id(a))
print(id(1))

def test(num):
    print("在函数内部 %d 对应的内存地址是 %d"%(num,id(a)))
    pass
a = 10
print(‘a的内存地址是 %d‘%id(a))
test(a) # 调用函数时传递引用，字典的key不能是可变类型

‘‘‘
格式化字符串的%()后面本质上是一个元组
为了数据安全。元组不可修改
‘‘‘
info = ("长",18)
print("%s 的年龄是 %d"%info)

info_str = "%s 的年龄是 %d"%info
print(info_str)