Global class members only instanciated once in python

Asked Dec 20 '17 at 10:58

Active Dec 20 '17 at 10:58

Viewed 16 times

The following code,

class A:
  pass

class B:
  member = A()

  def hello(self):
    print(repr( type(self).member ))

b1 = B()
b2 = B()

b1.hello()
b2.hello()

gives the following output:

<__main__.A object at 0x0000025193C03DA0>
<__main__.A object at 0x0000025193C03DA0>

It seems that python only instantiate A once and uses its value for all the instances of B. Why does it happen and is there a way of instantiating different global members for all instances of B ?

asked Dec 20 '17 at 10:58

Xatyrian

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use `__init__` to initialize `A` for each instance of `B`. – Dimitris Fasarakis Hilliard Dec 20 '17 at 10:59
can I still reference it as `type(self).member` after that ? – Xatyrian Dec 20 '17 at 11:01
No. Why would you want to do that? And how would it be "global" if it's different for every member? – Daniel Roseman Dec 20 '17 at 11:11

Global class members only instanciated once in python

0 Answers0