jzakiya wrote: > On Nov 13, 5:48 pm, "M.-A. Lemburg" <[EMAIL PROTECTED]> wrote: >> On 2008-11-13 23:31, jzakiya wrote: >> >> >> >>> On Nov 13, 5:21 pm, Alan Baljeu <[EMAIL PROTECTED]> wrote: >>>> I think you should rethink your post. The first case you posted makes no >>>> sense in any language I know. Also, a whole lot of nested IF's is a bad >>>> idea in any language. In Python, you will end up with code indented 40+ >>>> characters if you keep going. >>>> ----- Original Message ---- >>>> From: jzakiya <[EMAIL PROTECTED]> >>>> To: [EMAIL PROTECTED] >>>> Sent: Thursday, November 13, 2008 5:06:53 PM >>>> Subject: Python IF THEN chain equivalence >>>> I'm translating a program in Python that has this IF Then chain >>>> IF x1 < limit: --- do a --- >>>> IF x2 < limit: --- do b --- >>>> IF x3 < limit: --- do c --- >>>> .----- >>>> ------ >>>> IF x10 < limt: --- do j --- >>>> THEN >>>> THEN >>>> ----- >>>> THEN >>>> THEN >>>> THEN >>>> In other words, as long as 'xi' is less than 'limit' keep going >>>> down the chain, and when 'xi' isn't less than 'limit' jump to end of >>>> chain a continue. >>>> Is this the equivalence in Python? >>>> IF x1 < limit: >>>> --- do a --- >>>> elif x2 < limit: >>>> --- do b --- >>>> ---- >>>> ---- >>>> elif x10 < limit: >>>> --- do j --- >>>> --http://mail.python.org/mailman/listinfo/python-list >>>> __________________________________________________________________ >>>> Ask a question on any topic and get answers from real people. Go to Yahoo! >>>> Answers and share what you know athttp://ca.answers.yahoo.com >>> In the code the 'xi's and 'limit' are variables and the --- do letters >>> --- >>> phrases are simply writes to any array: an_array[xi]=0 >>> Actually, the code makes perfectly good sense, and is a necessity of >>> the algorithm I'm implementing, and works perfectly good in Forth, and >>> can be >>> written quite nicely within a normal page width. >>> I was just hoping I could perform the equivalent chain in Python >>> without >>> having to grossly indent the source code past the normal width of a >>> printed page. >>> But if that's the only way to do it in Python, then so be it. >> You should probably consider using a function and then >> convert the conditions to define return points: >> >> def do_something(...args...): >> >> if x1 >= limit: >> return >> ...do a... >> if x2 >= limit: >> return >> ...do b... >> etc. >> >> That is provided I understand the flow of control in your >> example... it's kind of strange to have THEN mark the *end* >> of the then-branch in an if-then-else construct. >> >> -- >> Marc-Andre Lemburg >> eGenix.com >> >> Professional Python Services directly from the Source (#1, Nov 13 2008)>>> >> Python/Zope Consulting and Support ... http://www.egenix.com/ >>>>> mxODBC.Zope.Database.Adapter ... http://zope.egenix.com/ >>>>> mxODBC, mxDateTime, mxTextTools ... http://python.egenix.com/ >> ________________________________________________________________________ >> 2008-11-12: Released mxODBC Connect 0.9.3 http://python.egenix.com/ >> >> :::: Try mxODBC.Zope.DA for Windows,Linux,Solaris,MacOSX for free ! :::: >> >> eGenix.com Software, Skills and Services GmbH Pastor-Loeh-Str.48 >> D-40764 Langenfeld, Germany. CEO Dipl.-Math. Marc-Andre Lemburg >> Registered at Amtsgericht Duesseldorf: HRB 46611 > > It's interesting to see people think it's strange to have code that > has multiple nested levels of IF THEN. Apparently you haven't seen > any Forth, assembly, et al code. All you're doing is having the branch > point for each conditional be the end of the chain, otherwise it falls > through to the code after the conditional. This is done all the time > in languages that let you actually manipulate the hardware. > > Just as a suggestion :-) a little humility would go a long way toward > being open minded and receptive to different paradigms. I've written > this program I'm doing now in Python in 3 other languages (including > Python, which I'm trying to make more efficient) and I seek to be > flexible in my software linguistic capabilities. > > I asked a very narrow question about a very specific language > mechanism, and I know exactly what and why I'm doing what I'm doing. > Well in my case what you are doing is pissing me off by failing to explain your original requirements sufficiently well and then taking a condescending attitude towards genuine efforts to help by people whose reputations I know and respect.
One wonders why someone at your stratospheric ability level would even need any help from the likes of us. You talk about the need for humility: physician, heal thyself. However good you may be at software, you demonstrate a marked lack of interpersonal skills. > I'll try some of the suggestions and see if they make the routine > faster in Python. That's a good idea. regards Steve -- Steve Holden +1 571 484 6266 +1 800 494 3119 Holden Web LLC http://www.holdenweb.com/ -- http://mail.python.org/mailman/listinfo/python-list
