No duplicate variable

[King]

class A(object):
def __init__(self, value=0.):
self.value = value

class B(A):
def __init__(self, value=None):
A.__init__(self)
self.value = value

obj = B()

When "B" initializes, it overwrite "value" variable of "A". How do I
make sure that no variable should not be defined with names of "A" in
"B"?

Prashant

 

[Diez B. Roggisch]

class A(object):
def __init__(self, value=0.):
self.value = value

class B(A):
def __init__(self, value=None):
A.__init__(self)
self.value = value

obj = B()

When "B" initializes, it overwrite "value" variable of "A". How do I
make sure that no variable should not be defined with names of "A" in
"B"?

To avoid these kinds of clashes, you can use the double-undescore
syntax. It will create a mangled name that looks like

_module_class_variablename


By this, the two different variable get distinct names.

*However*, this is neither a proper way of making variables private, nor
are name-clashes something that should arise more than every now-and-then.

Instead, try rather renaming value to something more meaningful.

Diez

 

[Terry Reedy]

class A(object):
def __init__(self, value=0.):
self.value = value

class B(A):
def __init__(self, value=None):
A.__init__(self)
self.value = value

obj = B()

When "B" initializes, it overwrite "value" variable of "A". How do I
make sure that no variable should not be defined with names of "A" in
"B"?

By knowing the public interface of A before you inherit from it, so you
do not do that.