jonathan.beckett wrote:
> Hi all,
>
> While working on support at work, I have been picking away at Python -
> because I think it could be a valuable scripting tool for building
> utilities from. I have been reading the python.org tutorials, and
> playing around with some basic code, but I have ended up with a few
> questions that probably have straightforward answers - any quick
> explanations or assistance would be fantastic...
Work through the tutorial; don't expect simply reading it to work.
> Question 1...
> Given the code below, why does the count method return what it does?
> How *should* you call the count method?
> a = []
> a.append(1)
> print a.count
count is a method, so this is a bound method expression.
What you _mean_ is:
a = []
a.append(1)
print a.count(1) # to count the ones.
> Question 2...
> What is the correct way of looping through a list object in a class via
> a method of it? (I've hit all sorts of errors picking away at this, and
> none of the tutorials I've found so far cover it very well) - apologies
> for the arbitrary class - it's the first example I thought up...
>
> class Gun:
> Shells = 10
>
> class Battleship:
> Gun1 = Gun()
> Gun2 = Gun()
> Guns = [Gun1,Gun2]
>
> def getShellsLeft(self):
> NumShells = 0
> for aGun in Guns:
> NumShells = NumShells + aGun.Shells
> return NumShells
>
> Bizmark = Battleship()
>
> print Bizmark.getShellsLeft()
Too many misconceptions here (I changed to a more PEP-8 style naming):
class Gun(object):
def __init__(self):
self.shells = 10
class Battleship(object):
def __init__(self):
self.guns = [Gun(), Gun()]
def getShellsLeft(self):
numShells = 0
for aGun in self.guns:
numShells += aGun.shells
return numShells
theBizmark = Battleship()
print theBizmark.getShellsLeft()
> In the above code, I guess I'm just asking for the *correct* way to do
> these simple kinds of things...
--Scott David Daniels
[EMAIL PROTECTED]
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