> I don't mean to insult anyone, but I've heard and read all the arguments
> against Python's truth-testing, and they
>don't impress me in the slightest. Most of them strike me as silly. The only
>argument that carries any weight to me is
>one which I haven't seen anyone raise:
>"if x:" turns something which arguably could have been a mistake ("oops, I
>forgot to write the condition!") into valid
>code.
The only problem I have had with the "if x:" notation is when I have values
that might be empty lists, empty strings, None, or a boolean value being
returned from the same source. But this is probably an instance when a good
programmer would explicitly check the type instead of the naive "if x:"
notation.
On the other hand, as a fairly n00b Python (and n00b Perl) developer, I find
the notation "if not x:" to be far more English readable than "if x==None or
len(x)== 0 or x==0 or bool(x):" (or some derivative/combination of those).
Ramit
Ramit Prasad | JPMorgan Chase Investment Bank | Currencies Technology
712 Main Street | Houston, TX 77002
work phone: 713 - 216 - 5423
This communication is for informational purposes only. It is not
intended as an offer or solicitation for the purchase or sale of
any financial instrument or as an official confirmation of any
transaction. All market prices, data and other information are not
warranted as to completeness or accuracy and are subject to change
without notice. Any comments or statements made herein do not
necessarily reflect those of JPMorgan Chase & Co., its subsidiaries
and affiliates.
This transmission may contain information that is privileged,
confidential, legally privileged, and/or exempt from disclosure
under applicable law. If you are not the intended recipient, you
are hereby notified that any disclosure, copying, distribution, or
use of the information contained herein (including any reliance
thereon) is STRICTLY PROHIBITED. Although this transmission and any
attachments are believed to be free of any virus or other defect
that might affect any computer system into which it is received and
opened, it is the responsibility of the recipient to ensure that it
is virus free and no responsibility is accepted by JPMorgan Chase &
Co., its subsidiaries and affiliates, as applicable, for any loss
or damage arising in any way from its use. If you received this
transmission in error, please immediately contact the sender and
destroy the material in its entirety, whether in electronic or hard
copy format. Thank you.
Please refer to http://www.jpmorgan.com/pages/disclosures for
disclosures relating to European legal entities.
--
http://mail.python.org/mailman/listinfo/python-list
