Let’s say I have this code:
class StaticParent:
def _print(self):
print("I'm StaticParent")
class StaticChild(StaticParent):
def _print(self):
print('StaticChild saying: ')
super()._print()
def _parent_print_proto(self):
print("I'm DynamicParent")
def _child_print_proto(self):
print('DynamicChild saying: ')
super()._print()
DynamicParent = type('DynamicParent', tuple([]), {"_print": _parent_print_proto})
DynamicChild = type('DynamicChild', (DynamicParent,), {"_print": _child_print_proto})
sc = StaticChild()
sc._print()
dc = DynamicChild()
dc._print()
And it’s output is:
StaticChild saying:
I'm StaticParent
DynamicChild saying:
Traceback (most recent call last):
File "/tmp/example.py", line 28, in <module>
dc._print()
File "/tmp/example.py", line 17, in _child_print_proto
super()._print()
RuntimeError: super(): __class__ cell not found
So question is how to create prototype method for many classes that calling super()?
PS I tried to implement method with lambda but it is also not working:
DynamicChildWithLambda = type('DynamicChild', (DynamicParent,), {"_print": lambda self : print('Lambda saying: ', super()._print())})
Traceback (most recent call last):
File "/tmp/example.py", line 30, in <module>
dcwl._print()
File "/tmp/example.py", line 23, in <lambda>
DynamicChildWithLambda = type('DynamicChild', (DynamicParent,), {"_print": lambda self : print('Lambda saying: ', super()._print())})
RuntimeError: super(): __class__ cell not found
PS2 Also I tried this way:
class StaticParent:
def _print(self):
print("I'm StaticParent")
def _child_print_proto(self):
print('DynamicChild saying: ')
super(StaticParent, self)._print()
DynamicChild = type('DynamicChild', (StaticParent,), {"_print": _child_print_proto})
dc = DynamicChild()
dc._print()
DynamicChild saying:
Traceback (most recent call last):
File "/tmp/example.py", line 13, in <module>
dc._print()
File "/tmp/example.py", line 8, in _child_print_proto
super(StaticParent, self)._print()
AttributeError: 'super' object has no attribute '_print'
>Solution :
As mentioned by Mark super arguments can’t be empty
class StaticParent:
def _print(self):
print("I'm StaticParent")
class StaticChild(StaticParent):
def _print(self):
print('StaticChild saying: ')
super()._print()
def _parent_print_proto(self):
print("I'm DynamicParent")
def _child_print_proto(self):
print('DynamicChild saying: ')
super(self.__class__, self)._print()
DynamicParent = type('DynamicParent', tuple([]), {"_print": _parent_print_proto})
DynamicChild = type('DynamicChild', (DynamicParent,), {"_print": _child_print_proto})
sc = StaticChild()
sc._print()
dc = DynamicChild()
dc._print()
StaticChild saying:
I'm StaticParent
DynamicChild saying:
I'm DynamicParent