解释python中的help()和dir()函数【面试题详解】

今天爱分享给大家带来解释python中的help()和dir()函数【面试题详解】，希望能够帮助到大家。
Help()函数是一个内置函数，用于查看函数或模块用途的详细说明

>>> import copy

>> help(copy.copy)

Help on function copy in module copy:

 copy(x)

 Shallow copy operation on arbitrary Python objects.

 See the module’s __doc__ string for more info.

Dir()函数也是内置函数，dir() 函数不带参数时，返回当前范围内的变量、方法和定义的类型列表；带参数时，返回参数的属性、方法列表。

>>> dir(copy.copy)

运行结果

[‘__annotations__’, ‘__call__’, ‘__class__’, ‘__closure__’, ‘__code__’, ‘__defaults__’, ‘__delattr__’, ‘__dict__’, ‘__dir__’, ‘__doc__’, ‘__eq__’, ‘__format__’, ‘__ge__’, ‘__get__’, ‘__getattribute__’, ‘__globals__’, ‘__gt__’, ‘__hash__’, ‘__init__’, ‘__init_subclass__’, ‘__kwdefaults__’, ‘__le__’, ‘__lt__’, ‘__module__’, ‘__name__’, ‘__ne__’, ‘__new__’, ‘__qualname__’, ‘__reduce__’, ‘__reduce_ex__’, ‘__repr__’, ‘__setattr__’, ‘__sizeof__’, ‘__str__’, ‘__subclasshook__’]