65.'str', 字节转换成字符串.第一个传入参数是要转换的字节,第二个参数是按什么编码转换成字符串 class str(object) | str(object='') -> str | str(bytes_or_buffer[, encoding[, errors]]) -> str | | Create a new string object from the given object. If encoding or | errors is specified, then the ob…

25.'float', 用于将整数和字符串转换成浮点数. class float(object) | float(x) -> floating point number | | Convert a string or number to a floating point number, if possible. | | Methods defined here: | | __abs__(self, /) | abs(self) | | __add__(self, value, /) | Retu…

6.'bool',  函数用于将给定参数转换为布尔类型,如果没有参数,返回 False. class bool(int) # 继承于int类型 | bool(x) -> bool # 创建bool类型的对象 | | Returns True when the argument x is true, False otherwise. # 参数x为真返回True,否则返回False. | The builtins True and False are the only two instances o…

64.'staticmethod', 返回静态方法 class staticmethod(object) | staticmethod(function) -> method | | Convert a function to be a static method. | | A static method does not receive an implicit first argument. | To declare a static method, use this idiom: | | c…

46.'memoryview',  返回给定参数的内存查看对象(Momory view).所谓内存查看对象,是指对支持缓冲区协议的数据进行包装,在不需要复制对象基础上允许Python代码访问. class memoryview(object) | Create a new memoryview object which references the given object. | | Methods defined here: | | __delitem__(self, key, /) | De…

36.'int', 用于将一个字符串或数字转换为整型 class int(object) | int(x=0) -> integer | int(x, base=10) -> integer | | Convert a number or string to an integer, or return 0 if no arguments | are given. If x is a number, return x.__int__(). For floating point | numbers…

32.'help', 接收对象作为参数,更详细地返回该对象的所有属性和方法 class _Helper(builtins.object) | Define the builtin 'help'. | | This is a wrapper around pydoc.help that provides a helpful message | when 'help' is typed at the Python interactive prompt. | | Calling help() at t…

13.'complex', 函数用于创建一个值为 real + imag * j 的复数或者转化一个字符串或数为复数.如果第一个参数为字符串,则不需要指定第二个参数. class complex(object) | complex(real[, imag]) -> complex number | | Create a complex number from a real part and an optional imaginary part. | This is equivalent to (…

11.'classmethod', 修饰符对应的函数不需要实例化,不需要 self 参数,但第一个参数需要是表示自身类的 cls 参数,可以来调用类的属性,类的方法,实例化对象等. class classmethod(object) | classmethod(function) -> method | | Convert a function to be a class method. # 将一个函数转换成类方法 | | A class method receives the class as…

8.'bytes', 字符串转换成字节流.第一个传入参数是要转换的字符串,第二个参数按什么编码转换为字节. class bytes(object) | bytes(iterable_of_ints) -> bytes # bytes([1, 2, 3, 4]) bytes must be in range(0, 256) | bytes(string, encoding[, errors]) -> bytes # bytes('你妈嗨', encoding='utf-8') | bytes(b…