On 08Mar2018 20:25, C W <tmrs...@gmail.com> wrote:
Thank you guys, lots of great answers, very helpful. I got it!
A follow-up question:
How did the value of "object" get passed to "time"? Obviously, they have
different names. How did Python make that connection?
Code is below for convenience.
class Clock(object):
def __init__(self, time):
self.time = time
def print_time(self):
time = '6:30'
print(self.time)
clock = Clock('5:30')
clock.print_time()
5:30
"object" isn't really passed anywhere, except to your class construction of
"Clock". It hasn't any relation to the name "time" at all.
In Python, all classes are subclasses (directly or not) of the base class
called "object", and your class definition makes that explicit here:
class Clock(object):
This defines your class as just like the "object" class, but with the following
extra features, which you go on the define below it.
With "new style classes" (a Python notion, not something special about OOP in
general) the "object" base class is implicit, so you could just as well have
written:
class Clock:
to achieve the same purpose.
Being a subclass of "object" gets you an assortment of methods immediately,
such as __str__ and __repr__ (used to present a class as a string). You even
get an __init__ for free, but the default does nothing and that is usually not
what you need.
Cheers,
Cameron Simpson <c...@cskk.id.au> (formerly c...@zip.com.au)
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