🌐 Mailman 3 June 2009 - Python-list - python.org

Re: do replacement evenly
by Iain King June 2, 2009

June 2, 2009

On Jun 2, 12:10 pm, oyster <lepto.pyt...(a)gmail.com> wrote: > I have some strings, and I want to write them into a text files, one > string one line > but there is a requirement: every line has a max length of a certain > number(for example, 10), so I have to replace extra SPACE*3 with > SPACE*2, at the same time, I want to make the string looks good, so, > for "I am123456line123456three"(to show the SPACE clearly, I type it > with a number), the first time, I replace the first SPACE, and get "I > am23456line123456three", then I must replace at the second SPACE > block, so I get "I am23456line23456three", and so on, if no SPACE*3 > is found, I have to aString.replace(SPACE*2, SPACE). > I hope I have stated my case clear. > > Then the question is, is there a nice solution? > > thanx Assuming you want to crush all spaces into single space, you can: while " " in s: s = s.replace(" ", " ") readable but not efficient. Better: s = " ".join((x for x in s.split(" ") if x)) Note that this will strip leading and trailing spaces. Or you can use regexps: import re s = re.sub(" {2,}", " ", s) Iain

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Is there any module for sea tides?
by alejandro June 2, 2009

June 2, 2009

I found some in C but could not find in Python....

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python 2.6 packages in python 3.0
by ssd June 2, 2009

June 2, 2009

Hi, I usually works with packages like pyserial, numpy, mathplotlib,pyUSB, etc.. When is planned that these packages are supported in Python 3.0? Seen this i would say that is not recommendable to use Python 3.0 at the moment? most of 2.6 packages are not available, not working in python 3.0. Thanks, Bye,

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(no subject)
by Kiran Siddiqui June 2, 2009

June 2, 2009

hi have to parse a very complex dumps(whatever it is), i have done the parsing thruogh python.since the parsed data is very huge in amount, i have to feed it in the database (SQL), I have also done this... now the thing is i have to compare the data now present in the sql. in actual i have to compare the data of 1st dump with the data of the 2nd dump..... the both dump have the same fields(attributes) but the values of their field may be change... so i have to detect this change.. for this i have to do the comparison... i.e, let i have a tableA ,its 1st row carry the data of dump1 and then on the 2nd day the data comes from dump2 go into the next row of tableA. and i have to compare both rows. but i dont have the idea how to do this all using python as my front end. plz plzzzz anyone help me:( _________________________________________________________________ Show them the way! Add maps and directions to your party invites. http://www.microsoft.com/windows/windowslive/products/events.aspx

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Re: Why date do not construct from date?
by Peter Otten June 2, 2009

June 2, 2009

Gabriel Genellina wrote: > If one can say float(3.0), str("hello"), etc -- what's so wrong with > date(another_date)? You can do x = float(x) when you don't know whether x is a float, int, or str. Not terribly useful, but sometimes convenient because making the float() call idempotent allows you to skip the type check. def subtract(a, b): if isinstance(a, str): a = float(b) if isinstance(b, str): b = float(b) return a - b becomes def subtract(a, b): return float(a) - float(b) For date you'd have to make the type check anyway, e. g. if isinstance(x, tuple): x = date(*x) else: x = date(x) # useless will only succeed if x already is a date as there would be no other way to create a date from a single value. So the date() call in the else branch is completely redundant unless you change date() to accept multiple types via the same signature: for x in "2000-01-01", datetime.now(), (2000, 1, 1): print date(x) Peter

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Why date do not construct from date?
by Alexandr N Zamaraev June 2, 2009

June 2, 2009

Simple example: [code] Python 2.5.4 (r254:67916, Dec 23 2008, 15:10:54) [MSC v.1310 32 bit (Intel)] on win32 >>> import datetime as dt >>> dt.date(2009, 10, 15) datetime.date(2009, 10, 15) >>> d = dt.date(2009, 10, 15) >>> dt.date(d) Traceback (most recent call last): File "<stdin>", line 1, in <module> TypeError: function takes exactly 3 arguments (1 given) >>> [/code] Why int form int, str from str, Decumal from Decumal can construct bat date from date not?

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Re: Installing 3.1 questions
by "Martin v. Löwis" June 2, 2009

June 2, 2009

> Seems to work, but I'd like to know where Python installs its items. I'm > wanting to test version 3.1 and downloaded the 'Bzipped source tar ball' > file (not sure of the difference between it and the 'Gzipped' one). Do I > need to run some sort of 'install' command from the Terminal to get > 3.1 to work? You need to build it. Read the README file in the source distribution. If you don't know what a "tar ball" is, read tar(1). Regards, Martin

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Absolute imports in Python 2.4
by Steven D'Aprano June 2, 2009

June 2, 2009

I have a package which includes a module which shadows a module in the standard library. For example: package +-- __init__.py +-- ham.py +-- spam.py +-- sys.py Inside that package, I want to import the standard library sys. In other words, I want an absolute import. In Python 2.7, absolute imports will be the default, and "import sys" will import the standard library module. To get to the package.sys module, I'll need "from . import sys". In Python 2.5 and 2.6, relative imports are the default, and package.sys will shadow the std lib version. I can say: from __future__ import absolute_import to use the Python 2.7 behaviour. What can I do in Python 2.4 to get an absolute import? I've read PEP 328 and googled, but haven't found any useful advice other than "well don't do that then". Plenty of pages complaining about relative imports, but I haven't found any work-arounds others than renaming the offending module. Are there any other ways around this? http://www.python.org/dev/peps/pep-0328/ -- Steven

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re: Dabo 0.9.2 released
by oyster June 2, 2009

June 2, 2009

I have to say: please let dabo use english if it does not find any langauge resource! I have 'e:\prg\py\sap-24\python e:\prg\py\pure_pylib\_dabo\tools\remove_dLocalize.py .', but then the scripts says 'I don't know _"

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Installing 3.1 questions
by jyoung79＠kc.rr.com June 2, 2009

June 2, 2009

Can anyone give me info on what and where Python installs on OS X? I ran the installers for version 2.6 and 3.0 and only installed Python (not IDLE, etc). I then added this to my .profile: PATH="/Library/Frameworks/Python.framework/Versions/3.0/bin:${PATH}" PATH="/Library/Frameworks/Python.framework/Versions/2.6/bin:${PATH}" PATH="/System/Library/Frameworks/Python.framework/Versions/Current/bin:${PATH}" export PATH Seems to work, but I'd like to know where Python installs its items. I'm wanting to test version 3.1 and downloaded the 'Bzipped source tar ball' file (not sure of the difference between it and the 'Gzipped' one). Do I need to run some sort of 'install' command from the Terminal to get 3.1 to work? Or can I manually drag the items to a correct location and then update my .profile? Thanks for taking the time to look at my questions. Jay

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