Python Built-in function 默认dir()机制对不同类型的对象表现不同,因为它尝试生成最相关但非完整的信息。 如果对象是模块对象,则列表包含模块属性的名称。 如果对象是类型或类对象,则列表包含其属性的名称,并递归地包含其基础的属性。 #没有对象>>>dir()['__annotations__','__builtins__','__doc__','...
In python3 documentation page for built-in functions, in the section for dir() function, it describes that dir() function "only returns a list of valid attributes for that object". Why it doesn't say anything about returning methods as well since dir() function on object (for ex. class...
The dir function is a built-in function: it lives in the built-in namespace. Applying the LGB rule means that the function is always available, and that no import statement is needed to access it.[54] You’ve already encountered many of the built-in functions, such as len, open, type...
>>>dir() ['__builtins__','__doc__','__name__','__package__'] 可以看到有一个__builtins__的模块名称,这个模块本身定义了一个名称空间,即内建名称空间,我们不妨dir一下: 1 2 >>>dir(__builtins__) ['ArithmeticError','AssertionError','AttributeError','BaseException','BufferError',...
标签 统计 built-in ×10 python ×5 bash ×2 arrays ×1 dictionary ×1 dir ×1 file-extension ×1 function ×1 hex ×1 iteration ×1 linux ×1 ordereddictionary ×1 overriding ×1 padding ×1 php ×1 python-datamodel ×1 r ×1 ruby ×1 sum ×1 types ×1 zsh ×1...
1 """ 2 内置函数 Built-in Function 3 """ 4 5 # abs() 取绝对值 6 print(abs(-1)) 7 8 # all() 序列中每个元素进行bool运算 包含空以及0为 False 9 """ 10 Return True if bool(x) is True for all values x in the iterable. 11 If the iterable is empty, return True. 12 "...
dir() help() id() object() type() input() open() print() eval() exec() compile() vars() locals() globals() callable() __import__() 参考:https://docs.python.org/3.5/library/functions.html print(abs(-1)) # 绝对值 1print(divmod(5, 2)) # 取商和余数 (2, 1)# 四舍五入...
Python has a set of built-in functions. FunctionDescription abs()Returns the absolute value of a number all()Returns True if all items in an iterable object are true any()Returns True if any item in an iterable object is true ascii()Returns a readable version of an object. Replaces none...
'b': bytearray(b'dbc'), 'lamb': <function <lambda> at 0x00000000024E8730>, '__package__': None, 'st': frozenset({1, 2, 3, 4}), ... """ code = """ for i in range(5): print(i, end=" ") """ exec(code) # 运行代码 0 1 2 3 4 ...
1.查看内建函数通过在python交互模式下,键入相应的命令即可查看当前python版本的一些内建函数如上图,我们使用dir()内建函数查看当前python的一些内建的属性:包括... __builtin__ >>>dir(__builtin__)2.常用的内建函数1)内建函数-获取帮助 >>>dir(className) >>> ...