b站视频^[1]

作为一种动态语言，java与python都是支持反射机制的

getattr

#funcs.py
def func_a():
    pass

def func_b():
    pass

def func_c():
    pass

#getattr: 动态加载模块，动态获取模块内的属性，并执行函数这样的属性
#实现func调用的动态化
import funcs

inp = input("输入想要调用的函数：")
func = getattr(funcs, f"func_{inp}")
func()

import

#实现了import的动态化
inp = input(‘输入你想调用的函数（模块.函数名）‘)
module, funcname = inp.split(‘.‘)
module = __import__(module)
if hasattr(module, funcname):
    func = getattr(module, f"func_{inp}")
    func()
else:
    print("404")

classObj()

#实例化 对象
#commonts.py
class person:
    def __init__(self, name):
        self.__name = name
    def run(self, area):
        print(f"{self.__name}在{area}跑步")

import commonts
import re
p = commonts.person(‘sniper‘)
p.run(‘林间小路‘)

def creatOject(name_path, *args, **kwargs):
    r = re.match(r"^(.*)\.(\w+)$",name_path)
    if r.group():
        # print(r.groups())
        module_name = r.group(1)
        class_name = r.group(2)
        class_obj = getattr(module, class_name)
        res = class_obj(‘sniper‘)
        return res
    else:
        print("404")

def doMethod(obj, method_name, *args, **kwargs):
    if hasattr(obj, method_name):
        method = getattr(obj, method_name)
        method(*args, **kwargs)
    else:
        print(f‘{method_name}:404‘)

setattr, delattr

django web

url - class method

反射机制

原文：https://www.cnblogs.com/kangshuaibo/p/14832590.html