On 23Oct2017 05:33, T Obulesu <obules...@gmail.com> wrote:
I'm new to python3 and scratching my head to write a program for this logic:
The tutor list might be a better place for such questions, but since we're
here...
classA.py
Class A:
# class for socket communication
basic init method that initializes port, address, connection
method send(message):
# for sending any message through the given port
method receive():
# will be keep on listening for incoming messages
classB.py
Class B:
import the send method from class A
send the messages from this class
classC.py
Class C:
import the receive method from the class A
receive all the messages from the same socket from here.
Note:
classA.py, classB.py, ClassC.py are saved in different locations.
Can someone help me in writing the code and how can I create a single object
and use it in multiple classed?
That is a pretty normal arrangement. Class A might look like this:
class A:
def __init__(self, port, address):
self.connection = ... make your connection to (address, port)
def send(self, msg):
send msg using self.connection ...
Since classes B and C seem expected to share tha same connection, the natural
thing is to set up the connection _separately_ from setting up B and C, and
pass the established connection to each.
So class B might commence:
class B:
def __init__(self, conn, ...):
self.conn = conn
... whatever other initialisation ...
def speak(self, something):
self.conn.send(something)
You'll notice here that we're _not_ importing anything about class A here.
Class B does not need to know class A's name to use it.
Because Python uses duck typing, you could pass _any_ object which has a
.send() method as "conn" to the class B setup. This allows you to write some
other class A2 with those same methods, but using some different type of
connection, and pass that in to classes B and C.
So a main programme might set things up like this:
from classA import A
from classB import B
from classC import C
conn = A(address, port)
sender = B(conn, other-stuff...)
receiver = C(conn, other-stuff...)
B.speak("foo")
and so forth.
Cheers,
Cameron Simpson <c...@cskk.id.au> (formerly c...@zip.com.au)
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