in= input(“请输入你想导入的模块名:”)

CC = __import__(in)

    #這种方式就是通过输入字符串导入你所想导入的模块

CC.f1()  # 执行模块中的f1方法

in = input("请输入模块:")

mod= __import__(in)    # 等价于import in

in_func = input("请输入要执行的函数：")

f = getattr(mod,in_func，None)

#作用:从导入模块中找到你需要调用的函数in_func,然后返回一个该函数的引用.没有找到就返回None

f() # 执行该函数

#是否有
def hasattr(*args, **kwargs): # real signature unknown

    """

    Return whether the object has an attribute with the given name.

    This is done by calling getattr(obj, name) and catching AttributeError.

    """

    pass

#得到

def getattr(object, name, default=None): # known special case of getattr

    """

    getattr(object, name[, default]) -> value

    Get a named attribute from an object; getattr(x, 'y') is equivalent to x.y.

    When a default argument is given, it is returned when the attribute doesn't

    exist; without it, an exception is raised in that case.

    """

    pass

#设置

def setattr(x, y, v): # real signature unknown; restored from __doc__

    """

    Sets the named attribute on the given object to the specified value.

    setattr(x, 'y', v) is equivalent to ``x.y = v''

    """

    pass

#删除

def delattr(x, y): # real signature unknown; restored from __doc__

    """

    Deletes the named attribute from the given object.

    delattr(x, 'y') is equivalent to ``del x.y''

    """

    pass

class A:

    f = '类的静态变量'

    def __init__(self,name,age):

        self.name=name

        self.age=age

    def say_hi(self):

        print('hi,%s'%self.name)

obj=A('斌哥',24)

#检测是否含有某属性

print(hasattr(obj,'name'))

print(hasattr(obj,'say_hi'))

#获取属性

n=getattr(obj,'name')

print(n)

func=getattr(obj,'say_hi')

# func2=getattr(obj,'say_hello')#没有该属性报错

# AttributeError: 'Foo' object has no attribute 'say_hello'

func3=getattr(obj,'say_hello',None)             #返回None

func4=getattr(obj,'say_hello',"没有该属性")   #返回 "没有该属性"

func()

#设置属性

#可以添加新属性，也可以更改旧属性

setattr(obj,'还能长高',True)

setattr(obj,'show_name',lambda self:self.name+'18cm')

print(obj.__dict__)

#{'还能长高': True, 'name': '斌哥', 'show_name': <function <lambda> at 0x0000024D6E9116A8>, 'age': 24}

print(obj.show_name(obj)) #斌哥18cm

# #删除属性

delattr(obj,'age')

delattr(obj,'show_name')

# delattr(obj,'show_name111')#不存在,则报错

#显示全部属性

print(obj.__dict__)

# {'还能长高': True, 'name': '斌哥'}

class A(object):

    staticField = "毕业于南昌大学"

    def __init__(self):

        self.name = '王庆斌'

    def func(self):

        return '返回func方法'

    @staticmethod

    def func2():

        return '返回func2方法'

    @classmethod

    def func3(cls):

        return '返回func3方法'

print(getattr(A, 'staticField'))

print(getattr(A, 'func'))

print(getattr(A, 'func2'))

print(getattr(A,'func3'))

setattr(A,'staticField','想毕业于五道口')

print(A.staticField)

毕业于南昌大学
<function A.func at 0x0000024D6E9AC158>
<function A.func2 at 0x0000024D6E9AC378>
<bound method A.func3 of <class '__main__.A'>>

想毕业于五道口

#类方法一样的修改

setattr(A,'func3',lambda:print("学会mongo"))

A.func3() 

学会mongo

import sys

def s1():

    print('s1')

def s2():

    print('s2')

this_module = sys.modules[__name__]

hasattr(this_module, 's1') #true

getattr(this_module, 's2') ==》得到该属性

# test1.py

class A:

    def func(self):

        return "func in A in 模块1"

#test2.py

import 模块1.test1 as test1

print(hasattr(test1,"A"))

a=test1.A()

print(hasattr(a,'func'))

a.func()

Out:

True

True

'func in A in 模块1'