Am 15.02.2013 18:06, schrieb Thomas Rachel:
Am 15.02.2013 17:59 schrieb Bob Brusa:
Hi,
I use a module downloaded from the net. Now I want to build my own
class, based on the class SerialInstrument offered in this module - and
in my class I would like to initialize a few things, using e. g. the
method clear() offered by SerialInstrument. Hence I type:
class myClass(SerialInstrument)
self.clear(self)
def f1(self, str1, str2)
...do something etc.
I then get the message "self not know" from the statement
self.clear(self).
Which is absolutely correct. Besides, I would have expected some syntax
errors.
You try to execute the clear() method during the definition of the
class, not during the instantiation.
Instantiation happens in the __init__() method.
You'll have to do it like this:
class myClass(SerialInstrument):
def __init__(self, *a, **k): # accept all parameters
super(myClass, self).__init__(*a, **k)
self.clear() # I don't think that self is to be given twice
here...
def f1(self, str1, str2):
pass
I have tried many other notations - none worked. What
works is however the following code - specifying myClass without the
self.clear(self) in it:
x = myClass("argument")
x.clear()
Here the clear() is called on the object which has been created, so
after calling the __init__() above (which is, roughly, equivalent to
calling it at the bottom of __init__()).
Thomas
Thomas,
This does not work either. The error comes while python analyses the
code - even prior to executing my program.... But what I want to achieve
is that this clear() is executed when the class is instantiated....which
I do with the code
x = myClass("COM7")
Of course, when scanning the class definition, the argument "COM7" is
not yet known.
Thanks for further help. Bob
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