python_src_get_getattr_getattribute

Example Python program python_src_get_getattr_getattribute.py For Python version 2.x. To test your Python version use:

python --version

Classes

class C(object):
class C2(object):

Methods

def init(self):
def getattribute(self, name):
def getattr(self, name):
def get(self, instance, owner):
def foo(self, x):

Code

Python example

class C(object):

    def __init__(self):
        self.a = None
        # self.z = None

    def __getattribute__(self, name):
        print("__getattribute__() is called")
        return object.__getattribute__(self, name)

    def __getattr__(self, name):
        print("__getattr__() is called ")
        return name + " from getattr"

    def __get__(self, instance, owner):
        print("__get__() is called", instance, owner)
        return self

    def foo(self, x):
        print(x)


class C2(object):
    d = C()


if __name__ == '__main__':
    print '1 >>>'
    c = C()

    print '2 >>>'
    c2 = C2()

    print '3 >>> get exist attr \'c.a\''
    print(c.a)

    print '4 >>> get not exist attr  \'c.z\''
    print(c.z)

    print '5 >>> c2.d'
    c2.d

    print '6 >>> c2.d.a'
    print(c2.d.a)

    print '7 >>> c2.d.z'
    print(c2.d.z)

Useful Links

Articles: https://python-commandments.org/
Python shell: https://bsdnerds.org/learn-python/
Tutorial: https://pythonprogramminglanguage.com/