🌐 Mailman 3 June 2002 - Python-list - python.org

Re: How to concatenate list members
by chris_mk＠hotmail.com June 1, 2002

June 1, 2002

I have to agree that '"sep".join(map(str, somelist))' is the best trade-off between simplicity and completeness (you never know when something may not be a string). If you go to http://www.mindview.net/Books/Python/ThinkingInPython.html (Bruce Eckel's page), he has a section on the page called "An idiom for concatenating strings" which looks like: cs = lambda *args: ''.join(map(str,args)) with an example of: print cs("X=",x," Y=",calc_y(x)) # you have to define calc_y somewhere else. If you do just look at it and work through it, it should make perfect sense. Chris holger krekel <pyth(a)devel.trillke.net> wrote in message news:<mailman.1022760904.18161.python-list(a)python.org>... > Ruediger Maehl wrote: > > Hello Pythoneers, > > > > I would like to concatenate all members of a list of strings. > > How can I do that? > > I know, I can use a for loop over all elements and concatenate > > them to one string. But is there another more efficient solution? > > 1) "sep".join(somelist) > > joins all objects in somelist (but the objects must of string-type!) > > 2) "sep".join(map(str, somelist)) > > joins the string-representations of all objects in somelist > > regards, > > holger

2 3

Making Programs Executable
by seraphim＠linuxmail.org June 1, 2002

June 1, 2002

I am reading the Python tutorial, and they say to use '#! /usr/bin/env python' as the first line to be able to execute the program withought having to type 'python file'. I am getting a bad interpreter error. I am running Slackware 8.0 and Red Hat 7.3 as well. Any help would be nice.

7 6

Python/Scripting language performance
by Curtis Jensen June 1, 2002

June 1, 2002

I'm looking for an explicit explination of why Scripting languages, specificaly Python, are slow compared to compiled languages. I've searched the newsgroup and bit on the web. I'm looking for a more indepth description other than because it's dynamic, or it's object oriented, or it's interpreted. Specificaly why do those aspects make it slower? Also how does the byte compiled python affect performance? If there is a paper out there that someone could refer me to, or if they could just explain it, it would be appreciated. Thanks. -- Curtis Jensen cjensen(a)bioeng.ucsd.edu http://www-bioeng.ucsd.edu/~cjensen/ FAX (425) 740-1451

4 3