"bahoo" <[EMAIL PROTECTED]> wrote:
> I don't see where the "str" came from, so perhaps the output of
> "open('source.txt').readlines()" is defaulted to "str?
Apart from Grant's explanation that str is the type of a string, what you
perhaps haven't yet grasped is that if you have a type and an instance of
that type there is an equivalence between calling a method on the instance,
or calling the method directly on the type and passing the instance as the
first parameter.
i.e. Given a type T and an instance I (so that type(I)==T) the following
two are equivalent:
I.method(args)
T.method(I, args)
what that means in this particular case is that if you have a string
'line' and want to strip leading and trailing whitespace you can call
either:
line.strip()
or:
str.strip(line)
So str.strip is just another way to refer to the strip method of a str (but
you do have to know that the line is a str rather than another type or it
won't work).
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