Chester wrote:
I see. A very good explanation indeed. Thank you for it. But why would
anyone want to do this anyway?
In a single sentence, OOP (Object Oriented Programming) is a way to
organize a program around your data and the operations on that data.
Many books and college courses are dedicated to OOP. Years could be
spent learning to apply its concepts. A web search would find a flood
of such information.
Gary Herron
On Wed, May 14, 2008 at 12:25 AM, Gary Herron
<[EMAIL PROTECTED]> wrote:
[EMAIL PROTECTED] wrote:
Hello!
I have trouble understanding something in this code snippet:
class TextReader:
"""Print and number lines in a text file."""
def __init__(self, file):
self.file = file
.
.
.
When would you do a thing like self.file = file ? I really don't
find an answer on this. Please help me understand this.
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If you know about Object-Oriented Programming this should make sense. If
you don't, then you have some reading/learning to do first.
When someone wants to create an object of type TextReader, they must supply
a value
ob = TextReader(v)
That calls the __init__ constructor with the supplied value of v in the
variable named file.
If the object being created wants to record the value for future use, then
the line
self.file = file
does just that. "self" is the name of the object being created,
"self.file" is an attribute named "file" of that object, and the assignment
stores the supplied value there.
Gary Herron
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