python-3.x-基本数据类型

当前学习版本为: python-3.6-4

代码:

 """整型 NUMBER"""
 a = 2 ** 5
 b = a + 4
 c = a / 4
 d = a // 4
 e = a % 5
 f,g = 120,112
 h = 3 + 4j
 i = 4 + 8j
 j = h * i
 print(a,b,c,d,e,f,g,j)

 """字符串型String"""
 str = 'wo shi zhang san!'
 #str[0] = '1' #字符串单个字符不可被修改
 print(str[0:-3])
 print(str[0:1])
 print(str[1:5]) #输出下标为1至下标为4的字符子串,即第二个至第五个的字符子串
 print(str * 4)
 print(str + str )

 """"列表型list"""
 list = ["zhangsan","lisi","wangwu","zhaoliu","zhouqi"]
 list[4] = "xiaozhe" #元素可以被修改
 print(list)
 print(list[0:3])
 print(list + list)

 """tuple 元组型"""
 #ple = （"1",'2'）
 tuple = ( 1,2,3,4,5,6,7)
 #tuple[4] = 44 #元素不可以被修改否则报错
 etuple = () #空元组
 otuple = (1) #单元素元组

 print(tuple[0:2])
 print(tuple * 3)
 print(etuple)
 print(otuple)

 """set集合型"""
 set1 = {"zhangsan","lisi", "wangwu", 'lisi', "小七"}
 #per = set("nishi","woshi","tashi") #创建一个新的集合
 per = set("nishi") #创建一个新的集合
 print(set1,per)
 a = set('abracadabra')
 b = set('alacazam')

 print("set-a =",a)
 print("set-b =",b)

 print("a - b =",a - b)  # a和b的差集

 print("a | b =",a | b)  # a和b的并集

 print("a & b =",a & b)  # a和b的交集

 print("a ^ b =",a ^ b)  # a和b中不同时存在的元素

 """字典型"""
 #键值对的形式存储，类似Json个是中键值的表示
 dict = {} #必须步骤声明为一个字典类型
 dict[""] = "c++"
 dict[""] = "java"
 dict[""] = "c"
 dict[""] = "python"
 print(dict)
 print(dict[""])
 print(dict.keys())
 print(dict.values())

结果：