Simple Python class questions

[John Dann]

Many thanks for the speedy replies.

On Thu, 19 Jun 2008 14:14:02 +0200, Cédric Lucantis <omer at no-log.org>
wrote:

>Le Thursday 19 June 2008 13:54:03 John Dann, vous avez écrit :
>> Let's say I define the class in a module called comms.py. The class
>> isn't really going to inherit from any other class (except presumably
>> in the most primitive base-class sense, which is presumably automatic
>> and implicit in using the class keyword).
>
>No it's not :) It is recommended to always use new-style classes, and thus to 
>give the object base explicitely :
>
>class serial_link (object) :
>	...

Can I just confirm: between the parentheses should be the literal
'object' - ie (object) - you're not just using 'object' as a
placeholder where there should be a more specific class name or
object?

--------------

On Thu, 19 Jun 2008 14:21:46 +0200, Ulrich Eckhardt
<eckhardt at satorlaser.com> wrote:

>Stop, this can't work. Other than VB, Python actually is case sensitive, so
>you must write 'try' and not 'Try' and also 'import' and not 'Import'.
>Further, many (all?) statements that cause an indention are usually
>terminated with a colon, so like with 'class ..:' and 'def ..:' you also
>must use 'try:' and not just 'try'. Fix all these and try again, I guess
>this will already help a lot.

Sorry - the original code was syntactically correct - I just re-keyed
it rather quickly for the original newsgroup post here, rather than
copy/paste a larger chunk. I'll try to be more careful with any future
posts.

>One more thing: you are abusing exceptions. Typically, in such a short
>program you only have one try-except pair in the main entry function and
>all other code only throws the exceptions. In particular the __init__
>function of a class should always signal errors using exceptions. However,
>this is not a strict yes/no question but rather a stylistic one.

Thanks - I need to think more clearly about the best way of doing
this.

JGD