Python 数据类型
Python基础 2022-06-06 12:52:26小码哥的IT人生shichen
Python 数据类型
内置数据类型
在编程中,数据类型是一个重要的概念。
变量可以存储不同类型的数据,并且不同类型可以执行不同的操作。
在这些类别中,Python 默认拥有以下内置数据类型:
文本类型: | str |
数值类型: | int , float , complex |
序列类型: | list , tuple , range |
映射类型: | dict |
集合类型: | set , frozenset |
布尔类型: | bool |
二进制类型: | bytes , bytearray , memoryview |
获取数据类型
您可以使用 type() 函数获取任何对象的数据类型:
示例代码:
打印变量 x 的数据类型:
x = 10
print(type(x))
完整实例:
x = 10
print(type(x))
设置数据类型
在 Python 中,当您为变量赋值时,会设置数据类型:
示例 | 数据类型 | 试一试 |
---|---|---|
x = "Hello World" | str | 试一试 |
x = 29 | int | 试一试 |
x = 29.5 | float | 试一试 |
x = 1j | complex | 试一试 |
x = ["apple", "banana", "cherry"] | list | 试一试 |
x = ("apple", "banana", "cherry") | tuple | 试一试 |
x = range(6) | range | 试一试 |
x = {"name" : "Bill", "age" : 63} | dict | 试一试 |
x = {"apple", "banana", "cherry"} | set | 试一试 |
x = frozenset({"apple", "banana", "cherry"}) | frozenset | 试一试 |
x = True | bool | 试一试 |
x = b"Hello" | bytes | 试一试 |
x = bytearray(5) | bytearray | 试一试 |
x = memoryview(bytes(5)) | memoryview | 试一试 |
设定特定的数据类型
如果希望指定数据类型,则您可以使用以下构造函数:
示例 | 数据类型 | 试一试 |
---|---|---|
x = str("Hello World") | str | 试一试 |
x = int(29) | int | 试一试 |
x = float(29.5) | float | 试一试 |
x = complex(1j) | complex | 试一试 |
x = list(("apple", "banana", "cherry")) | list | 试一试 |
x = tuple(("apple", "banana", "cherry")) | tuple | 试一试 |
x = range(6) | range | 试一试 |
x = dict(name="Bill", age=36) | dict | 试一试 |
x = set(("apple", "banana", "cherry")) | set | 试一试 |
x = frozenset(("apple", "banana", "cherry")) | frozenset | 试一试 |
x = bool(5) | bool | 试一试 |
x = bytes(5) | bytes | 试一试 |
x = bytearray(5) | bytearray | 试一试 |
x = memoryview(bytes(5)) | memoryview | 试一试 |
完整实例1:
x = "Hello World"
#display x:
print(x)
#display the data type of x:
print(type(x))
完整实例2:
x = 20
#display x:
print(x)
#display the data type of x:
print(type(x))
完整实例3:
x = 20.5
#display x:
print(x)
#display the data type of x:
print(type(x))
完整实例4:
x = 1j
#display x:
print(x)
#display the data type of x:
print(type(x))
完整实例5:
x = ["apple", "banana", "cherry"]
#display x:
print(x)
#display the data type of x:
print(type(x))
完整实例6:
x = ("apple", "banana", "cherry")
#display x:
print(x)
#display the data type of x:
print(type(x))
完整实例7:
x = range(6)
#display x:
print(x)
#display the data type of x:
print(type(x))
完整实例8:
x = {"name" : "Bill", "age" : 63}
#display x:
print(x)
#display the data type of x:
print(type(x))
完整实例9:
x = {"apple", "banana", "cherry"}
#display x:
print(x)
#display the data type of x:
print(type(x))
完整实例10:
x = frozenset({"apple", "banana", "cherry"})
#display x:
print(x)
#display the data type of x:
print(type(x))
完整实例11:
x = True
#display x:
print(x)
#display the data type of x:
print(type(x))
完整实例12:
x = b"Hello"
#display x:
print(x)
#display the data type of x:
print(type(x))
完整实例13:
x = bytearray(5)
#display x:
print(x)
#display the data type of x:
print(type(x))
完整实例14:
x = memoryview(bytes(5))
#display x:
print(x)
#display the data type of x:
print(type(x))
完整实例15:
x = str("Hello World")
#display x:
print(x)
#display the data type of x:
print(type(x))
完整实例16:
x = int(20)
#display x:
print(x)
#display the data type of x:
print(type(x))
完整实例17:
x = float(20.5)
#display x:
print(x)
#display the data type of x:
print(type(x))
完整实例18:
x = complex(1j)
#display x:
print(x)
#display the data type of x:
print(type(x))
完整实例19:
x = list(("apple", "banana", "cherry"))
#display x:
print(x)
#display the data type of x:
print(type(x))
完整实例20:
x = tuple(("apple", "banana", "cherry"))
#display x:
print(x)
#display the data type of x:
print(type(x))
完整实例21:
x = range(6)
#display x:
print(x)
#display the data type of x:
print(type(x))
完整实例22:
x = dict(name="John", age=36)
#display x:
print(x)
#display the data type of x:
print(type(x))
完整实例23:
x = set(("apple", "banana", "cherry"))
#display x:
print(x)
#display the data type of x:
print(type(x))
完整实例24:
x = frozenset(("apple", "banana", "cherry"))
#display x:
print(x)
#display the data type of x:
print(type(x))
完整实例25:
x = bool(5)
#display x:
print(x)
#display the data type of x:
print(type(x))
完整实例26:
x = bytes(5)
#display x:
print(x)
#display the data type of x:
print(type(x))
完整实例27:
x = bytearray(5)
#display x:
print(x)
#display the data type of x:
print(type(x))
完整实例28:
x = memoryview(bytes(5))
#display x:
print(x)
#display the data type of x:
print(type(x))