Re: What make function with huge list so slow

> Figure out how much memory fib_dp is holding on to right before it returns > the answer. fib(40) is a _big_ number! And so is fib(39), and > fib(38), and fib(37), etc. By the time you're done, you're holding > on to quite a huge pile of storage here. Depending on how much phys

Re: What make function with huge list so slow

'I'm just running them in succession and seeing how long they'. The full code looks like this, this is only an example.py here. and I run 'time python3 example.py' for each function. def fib_dp(n): dp = [0] * (n+1) if n <= 1: return n dp[0], dp[1] = 0, 1

Re: What make function with huge list so slow

Thank you, Chris. I tried your suggestions. I don't think that is the reason, fib_dp_look() and fib_dp_set() which also allocation a big list can return in 2s. Chris Angelico 于2019年8月25日周日 上午11:27写道： > On Sun, Aug 25, 2019 at 12:56 PM Windson Yang wrote: > > > > I h

What make function with huge list so slow

I have two functions to calculate Fibonacci numbers. fib_dp use a list to store the calculated number. fib_dp2 just use two variables. def fib_dp(n): if n <= 1: return n dp = [0] * (n+1) dp[0], dp[1] = 0, 1 for i in range(2, n+1): dp[i] =

Re: How should we use global variables correctly?

019 09:07, Frank Millman wrote: > >On 2019-08-23 8:43 AM, Windson Yang wrote: > >>In class.py > >> > >> class Example: > >> def __init__(self): > >> self.foo = 1 > >> def bar() > >> retu

Re: How should we use global variables correctly?

the global.py is short and clean enough (didn't have a lot of other class), they are pretty much the same. Or I missed something? Chris Angelico 于2019年8月23日周五 上午9:34写道： > On Fri, Aug 23, 2019 at 11:24 AM Windson Yang wrote: > > > > Thank you all for the great explanation,

Re: How should we use global variables correctly?

Thank you all for the great explanation, I still trying to find some good example to use 'global', In CPython, I found an example use 'global' in cpython/Lib/zipfile.py _crctable = None def _gen_crc(crc): for j in range(8): if crc & 1: crc = (crc >> 1) ^

How should we use global variables correctly?

I can 'feel' that global variables are evil. I also read lots of articles proves that (http://wiki.c2.com/?GlobalVariablesAreBad). However, I found CPython Lib use quite a lot of `global` keyword. So how should we use `global` keyword correctly? IIUC, it's fine that we use `global` keyword inside t

Re: fopen() and open() in cpython

Thank you so much for the answer, now it makes sense :D eryk sun 于2019年8月15日周四 上午12:27写道： > On 8/13/19, Windson Yang wrote: > > After my investigation, I found Since Python maintains its own buffer > when > > read/write files, the build-in python open() function wi

fopen() and open() in cpython

After my investigation, I found Since Python maintains its own buffer when read/write files, the build-in python open() function will call the open() system call instead of calling standard io fopen() for caching. So when we read/write a file in Python, it would not call fopen(), fopen() only use

Re: Understand workflow about reading and writing files in Python

DL Neil 于2019年6月24日周一 上午11:18写道： > Yes, better to reply to list - others may 'jump in'... > > > On 20/06/19 5:37 PM, Windson Yang wrote: > > Thank you so much for you review DL Neil, it really helps :D. However, > > there are some parts still confused me,

Re: Understand workflow about reading and writing files in Python

When you said "C-runtime buffered I/O", are you talking about Standard I/O in C (FILE * object)? AFAIN, In CPython, we didn't use Standard I/O, right? Dennis Lee Bieber 于2019年6月25日周二 上午12:48写道： > On Mon, 24 Jun 2019 15:18:26 +1200, DL Neil > declaimed the following: > > > > > >However, the OpSy

Fwd: Understand workflow about reading and writing files in Python

1) is likely not that of (3) - otherwise why use a > "buffer"? The size of (2) must be larger than (1) and larger than (2) - > for reasons already illustrated. > Is this a typo? (2) larger than (1) larger than (2)? > > I recall learning how to use buffers with a series of hand

Understand workflow about reading and writing files in Python

I'm trying to understand the workflow of how Python read/writes data with buffer. I will be appreciated if someone can review it. ### Read n data 1. If the data already in the buffer, return data 2. If the data not in the buffer: 1. copy all the current data from the buffer 2. create a new

Understand workflow about reading and writing files in Python

I'm trying to understand the workflow of how python read/writes files with buffer. I drew a diagram for it. I will be appreciated if someone can review the diagram :D [image: 屏幕快照 2019-06-15 下午12.50.57.png] -- https://mail.python.org/mailman/listinfo/python-list

Questions about the IO modules and C-api

I have some questions about the IO modules. 1. My script: f = open('myfile, 'a+b') f.close() I added a printf statement at the beginning of _io_open_impl , the output is: _io_open _io_open _io_open

write function call _io_BufferedWriter_write_impl twice?

My script looks like this: f = open('myfile', 'a+b') f.write(b'abcde') And I also add a `printf` statement in the _io_BufferedWriter_write_impl function. static PyObject *

Duplicate function in thread_pthread.h

When I try to understand the code about the thread. I found the thread_pthread.h file has some duplicate functions. Like `PyThread_free_lock`, `PyThread_release_lock`, `PyThread_acquire_lock_timed`. IIUC, C doesn't support function overload. So why we have functions with the same name and args? --

CPython compiled failed in macOS

version: macOS 10.14.4, Apple LLVM version 10.0.1 (clang-1001.0.46.4). I cloned the CPython source code from GitHub then compiled it which used to work quite well. However, I messed up my terminal a few days ago for installing gdb. Now when I try to compile the latest CPython source code with ./co

How to configure trusted CA certificates for SSL client?

et the trusted CA certificates from, from Python or the underlying OS? What configuration do I need in order for the SSL client to conduct the SSL handshake successfully? Appreciate any help! Gang Gang Yang Shonborn-Becker Systems Inc. (SBSI) Contractor Engineering Supporting SEC Office:

RE: [Non-DoD Source] Re: Python 3.5.0 python --version command reports 2.5.4

Thanks to all that replied. Indeed I had CollabNet SVN server installed a while back and it came with an older version of Python. Gang Yang Shonborn-Becker Systems Inc. (SBSI) Contractor Engineering Supporting SEC Office: 732-982-8561, x427 Cell: 732-788-7501 Email: gang.yang@mail.mil

Python 3.5.0 python --version command reports 2.5.4

Hi, I just installed Python 3.5.0 (since 3.5.2 would not installed on Windows 2008 R2) and tried the python --version command. Surprisingly, the command reported 2.5.4. What's going on? Gang Yang Shonborn-Becker Systems Inc. (SBSI) Contractor Engineering Supporting SEC Office: 732-982

Python 3.5.0 python --version command reports 2.5.4

Hi, I just installed Python 3.5.0 (since 3.5.2 would not installed on Windows 2008 R2) and tried the python --version command. Surprisingly, the command reported 2.5.4. What's going on? Gang Yang Shonborn-Becker Systems Inc. (SBSI) Contractor Engineering Supporting SEC Office: 73

Conversion: execfile --> exec

The python 2.x command is as following: --- info = {} execfile(join('chaco', '__init__.py'), info) -- But execfile has been removed in python 3.x. So my problem is how to convert the above to a 3.x based command? thanks very much -- https://mai

sublime textx 3 and python 35

Dear Python Team, I'm trying to install python35 and use sublime text 3 to write code on it. After I change the path name to the python app location. I still have some problem. I wrote a simple print function in sublime text(I already saved the file with .py extension) and the console show "fini

Re: Newbie question related to Boolean in Python

bear_moved = False while True: next = raw_input("> ") if next == "take honey": dead("The bear looks at you then slaps your face off.") elif next == "taunt bear" and not bear_moved: print "The bear has moved from the door. You can go through

Please recommend a open source for Python ACLs function

Hello Dear All: I would like to write some simple python test code with ACL(Access Control List) functions. Now simply I aim to use MAC address as ACL parameters, is there any good ACL open source recommended for using? Simple one is better. Any tips or suggestions welcomed and appreciated.

RE: python2.7 kill thread and find thread id

Sorry for the misarrangement of my code in list, it happens everytime. I apologized. From: waitmefore...@hotmail.com To: python-list@python.org Subject: python2.7 kill thread and find thread id Date: Wed, 4 Jan 2012 14:10:46 +0800 Hello,guys!! I am using python2.7 to write a simple thread

python2.7 kill thread and find thread id

Hello,guys!! I am using python2.7 to write a simple thread program which print the current running thread id and kill it with this id. But I have some questions with this. My code: -from threading import Threadclass t(Thread): def __init__(

RE: Localhost client-server simple ssl socket test program problems

> To: python-list@python.org > From: li...@cheimes.de > Subject: Re: Localhost client-server simple ssl socket test program problems > Date: Thu, 15 Dec 2011 20:45:43 +0100 > > Am 15.12.2011 20:09, schrieb Yang Chun-Kai: > > Server side error: > > &g

RE: Localhost client-server simple ssl socket test program problems

hanks. Kay > To: python-list@python.org > From: li...@cheimes.de > Subject: Re: Localhost client-server simple ssl socket test program problems > Date: Thu, 15 Dec 2011 21:19:14 +0100 > > Am 15.12.2011 21:09, schrieb Yang Chun-Kai: > > Thanks for tips. > > >

RE: Localhost client-server simple ssl socket test program problems

calhost client-server simple ssl socket test program problems > Date: Thu, 15 Dec 2011 20:45:43 +0100 > > Am 15.12.2011 20:09, schrieb Yang Chun-Kai: > > Server side error: > > > > File "views.py", line 17, in > > connstream = ssl.wrap_socket(newsocket, ser

Localhost client-server simple ssl socket test program problems

Hello,everyone!! I am writing a simple ssl client-server test program on my personal laptop. And I encounter some problems with my simple programs. Please give me some helps.---

Re: Keyboard Layout: Dvorak vs Colemak: is it Worthwhile to Improve the Dvorak Layout?

On Jun 13, 11:30 am, Tim Roberts wrote: > Xah Lee wrote: > > >(a lil weekend distraction from comp lang!) > > >in recent years, there came this Colemak layout. The guy who created > >it, Colemak, has a site, and aggressively market his layout. It's in > >linuxes distro by default, and has become

Re: multiprocessing Pool.imap broken?

My self-reply tried to preempt your suggestion :) On Wed, Mar 30, 2011 at 12:12 AM, kyle.j.con...@gmail.com wrote: > Yang, > > My guess is that you are running into a problem using multiprocessing with > the interpreter. The documentation states that Pool may not work correctly &g

Re: multiprocessing Pool.imap broken?

The problem was that Pool shuts down from its finalizer: http://stackoverflow.com/questions/5481104/multiprocessing-pool-imap-broken/5481610#5481610 On Wed, Mar 30, 2011 at 5:59 AM, eryksun () wrote: > On Tuesday, March 29, 2011 9:44:21 PM UTC-4, Yang Zhang wrote: >> I've

Re: multiprocessing Pool.imap broken?

On Tue, Mar 29, 2011 at 6:44 PM, Yang Zhang wrote: > I've tried both the multiprocessing included in the python2.6 Ubuntu > package (__version__ says 0.70a1) and the latest from PyPI (2.6.2.1). > In both cases I don't know how to use imap correctly - it causes the > enti

multiprocessing Pool.imap broken?

I've tried both the multiprocessing included in the python2.6 Ubuntu package (__version__ says 0.70a1) and the latest from PyPI (2.6.2.1). In both cases I don't know how to use imap correctly - it causes the entire interpreter to stop responding to ctrl-C's. Any hints? Thanks in advance. $ pytho

Re: Python subprocesses experience mysterious delay in receiving stdin EOF

riter FD - as long as p2 exists, p1 won't see EOF Turns out there's a `close_fds` parameter to `Popen`, so the solution is to pass `close_fds=True`. All simple and obvious in hindsight, but still managed to cost at least a couple eyeballs good chunks of time. On Sun, Feb 13, 2011 at 11:52 PM

Re: Python subprocesses experience mysterious delay in receiving stdin EOF

Anybody else see this issue? On Thu, Feb 10, 2011 at 10:37 AM, Yang Zhang wrote: > On Thu, Feb 10, 2011 at 12:28 AM, Jean-Michel Pichavant > wrote: >> Yang Zhang wrote: >>> >>> On Wed, Feb 9, 2011 at 11:01 AM, MRAB wrote: >>> >>>> >>>

Re: Python subprocesses experience mysterious delay in receiving stdin EOF

On Thu, Feb 10, 2011 at 12:28 AM, Jean-Michel Pichavant wrote: > Yang Zhang wrote: >> >> On Wed, Feb 9, 2011 at 11:01 AM, MRAB wrote: >> >>> >>> On 09/02/2011 01:59, Yang Zhang wrote: >>> >>>> >>>> I reduced a problem I was

Re: Python subprocesses experience mysterious delay in receiving stdin EOF

On Wed, Feb 9, 2011 at 11:01 AM, MRAB wrote: > On 09/02/2011 01:59, Yang Zhang wrote: >> >> I reduced a problem I was seeing in my application down into the >> following test case. In this code, a parent process concurrently >> spawns 2 (you can spawn more) subproces

Python subprocesses experience mysterious delay in receiving stdin EOF

ts: t.start() for t in ts: t.join() Example output: 0.001 0 starting 0.003 1 starting 0.005 0 writing 0.016 1 writing 0.093 0 closing 0.093 0 reading 0.094 1 closing 0.094 1 reading 0.098 .. 1 done reading 5.103 1 done 5.108 .. 0 done reading 10.113 0 done -- Yang Zhang http://yz.mit.edu/ -- http://mail.python.org/mailman/listinfo/python-list

problems on installing PyGTK in Windows XP

Python 2.6.3 is installed on my Windows XP throught the binary file provided by Python.org. Then I followed the steps described here: http://faq.pygtk.org/index.py?req=show&file=faq21.001.htp to install PyGTK. However, I still get the following error: >>> import pygtk >>> pygtk.require('2.0') >>>

Re: error when using Pmw.BLT

On Oct 21, 12:13 pm, Robert Kern wrote: > On 2009-10-21 10:50 AM, Yang Yang wrote: > > > > > Hello, > > > I tried to follow the following code demonstrating the use of Pmw.BLT: > > >  >>> from Tkinter import * > >  >>> import Pmw > &g

error when using Pmw.BLT

Hello, I tried to follow the following code demonstrating the use of Pmw.BLT: >>> from Tkinter import * >>> import Pmw >>> master = Tk() >>> g = Pmw.Blt.Graph( master ) I got the following error message after I typed the last line: Traceback (most recent call last): File "", line 1, in File

error when using Pmw.BLT

I tried to follow the following code demonstrating the use of Pwm.BLT: >>> from Tkinter import * >>> import Pmw >>> master = Tk() >>> g = Pmw.Blt.Graph( master ) I got the following error message after I typed the last line: Traceback (most recent call last): File "", line 1, in File "C:\Py

dict would be very slow for big data

hi i am trying to insert a lot of data into a dict, which may be 10,000,000 level. after inserting 10 unit, the insert rate become very slow, 50,000/ s, and the entire time used for this task would be very long,also. would anyone know some solution for this case? thanks -- http://mail.python.

dict is really slow for big truck

i try to load a big file into a dict, which is about 9,000,000 lines, something like 1 2 3 4 2 2 3 4 3 4 5 6 code for line in open(file) arr=line.strip().split('\t') dict[arr[0]]=arr but, the dict is really slow as i load more data into the memory, by the way the mac i use have 16G memory.

Re: psycopg2 weirdness

tringobject.c, line 107. Abort trap with a pop that says: "The application Python quit unexpectedly. The problem may have been caused by the _psycopg.so plug-in". -- I don't understand the error message above. The date did get passed correctly and am now not even using it, I use the hard coded date. So what is going on? Any help would be great. Thank you! Neha -- http://mail.python.org/mailman/listinfo/python-list -- Yang Zhang http://www.mit.edu/~y_z/ -- http://mail.python.org/mailman/listinfo/python-list

python3.0 base64 error

I use base64 module on python3.0 like: import base64 b="hello world" a=base64.b64encode(b) print(a) but when i run it,it catch a error: Traceback (most recent call last): File "/home/jackie-yang/yd5m19/pythonstudy/test.py", line 4, in a=base64.b64encode(b) File "

some question about python2.6 and python3k

Hi,guys i am a new guy for python world,i have some question want to ask 1.should i learn about python2.6 or python3k?i heard of it has some difference from them 2.Do python3k has some good web framework(like web.py)? Thanks ! -- http://mail.python.org/mailman/listinfo/python-list

Re: py2exe, PyQT, QtWebKit and jpeg problem

On 6月20日, 下午11时04分, Carbonimax <[EMAIL PROTECTED]> wrote: > hello > > I have a problem with py2exe and QtWebKit : > I make a program with a QtWebKit view. > If I launch the .py directly, all images (jpg, png) are displayed but > if I compile it with py2exe I have only png images. No jpg ! > No erro

Unbuffered stdout/auto-flush

Hi, is there any way to get unbuffered stdout/stderr without relying on the -u flag to python or calling .flush() on each print (including indirect hacks like replacing sys.stdout with a wrapper that succeeds each write() with a flush())? Thanks in advance! -- Yang Zhang http://www.mit.edu

os.system() not returning

I have a Python program that does the following (pseudo-code): while True: is_downloading = True use ftplib to download any new files from a server is_downloading = False os.system('make') sleep(60) To deal with intermittent connectivity/failures (this is running on a mobile device), /e

Re: Closing socket file descriptors

eadable( self ): ... "js " <[EMAIL PROTECTED]> wrote in news:[EMAIL PROTECTED]: > Hello, Yang. > > You're not supposed to use os.open there. > See the doc at http://docs.python.org/lib/os-fd-ops.html > > Is there any reason you want to use os.close? > >

Closing socket file descriptors

Hi, I'm experiencing a problem when trying to close the file descriptor for a socket, creating another socket, and then closing the file descriptor for that second socket. I can't tell if my issue is about Python or POSIX. In the following, the first time through, everything works. On the sec

reading argv argument of unittest.main()

I've read that unittest.main() can take an optional argv argument, and that if it is None, it will be assigned sys.argv. Is there a way to pass command line arguments through unittest.main() to the setUp method of a class derived from unittest.TestCase? Thank you in advance. Winston -- http://

using PyUnit to test with multiple threads

Is it possible to use PyUnit to test with multiple threads? I want to send many commands to a database at the same time. The order of execution of the commands is indeterminate, and therefore, so is the status message returned. For example, say that I send the commands "get" and "delete" for a gi

Determining cause of termination

ssible what happened? For starters, I'm now checking exit status and periodically running 'top' to monitor memory consumption, but are there any other ideas? Thanks in advance, Yang -- http://mail.python.org/mailman/listinfo/python-list

Re: Assertion failure on hotshot.stats.load()

;"" error i get: Traceback (most recent call last): File "/home/yang/local/bin/profile.py", line 611, in ? run('execfile(%r)' % (sys.argv[0],), options.outfile, options.sort) File "/home/yang/local/bin/profile.py", line 72, in run prof = prof

Re: Assertion failure on hotshot.stats.load()

I fell back onto the old profile module, but got the following error when trying to use zope.interface. I am now without any way to profile my application. Traceback (most recent call last): File "/home/yang/local/bin/profile.py", line 611, in ? run('execfile(%r)

Assertion failure on hotshot.stats.load()

Note: I realize hotshot is obsoleted by cProfile, but 2.5 breaks several packages I depend on. I'm using Python 2.4.3. I'm getting an AssertionError on "assert not self._stack" when calling hotshot.stats.load() on my app's hotshot profile. The app consistently causes hotshot to generate such a pro

Python 2.5 "make install" bug?

All the site-packages/*.so files get copied to the directory specified in my ~/.pydistutils.cfg instead of lib-dynload under the prefix dir, then proceeds to chmod 755 all the files in that directory (including ones that existed before install). Please advise. -- http://mail.python.org/mailman/lis

Re: How to download a web page just like a web browser do ?

Thank you , Max ! I think HarvestMan is just what I need ! Thanks again ! -- http://mail.python.org/mailman/listinfo/python-list

How to download a web page just like a web browser do ?

Hi , It is about one month passed since I post to this list last time . Yes , I use python , I used it in every day normal work , whenever I need to do some scripts or other little-scale works , python is the first one I took consideration in . I must say it is a powerful tool for me , and wha

PyImport_Import() failed

Hello,   I'm new to Python.I want to embed Python interpreter into my C++ application powered by Borland C++ Builder 2006.   I have written some C++ code in order to evaluate Python script file, but PyImport_Import() calls failed.I really don't know what's wrong with my cpp code.It always return a

How do you use this list ?

Hi everyone , I have join this list for about 4 months , and everyday I receive hundreds of mails . There is no means to read all of them , so I just read something interesting for me . But if so , there are too much mails pile up in my inbox , I want to ask how do you use this list , reading every

Re: Python or Ajax?

I think if you know java language very well but feel suffering with the error prone javascript , GWT is good choose for AJAX development . With the well-known IDE Eclipse your development time efficiency will promote fast ! -- http://mail.python.org/mailman/listinfo/python-list

Re: An error ?

It works , thank you everyone ! I think there is much more I need to learn before I can grasp a full understand of the C/S modle ! Thanks again ! -- http://mail.python.org/mailman/listinfo/python-list

An error ?

Hi , I am confronted with an odd question in the python cgi module ! Below is my code : import cgitb ; cgitb.enable() import cgi print "Hello World !" How easy the script is , and the url is 202.113.239.51/vote/cgi/a.py but apache give me a 'Server internal error !' and the error log is : [Fr

Re: An algorithm problem

rd Bo Yang #This is the file for the solution of the 0-1 ring problem #in the csdn algorithm forum #The input to this program is a integer n , #The ouuput of the algorithm is the a list of 2^n elements #in which every number in the range of 0~2^n-1 just appear #once exactly . flag = 0# wheth

Re: An algorithm problem

as a ring , and fetch any continuous 2 numbers from it , finally get four combinations : 11 , 10 , 00 , 01 and they are 3 , 2 , 0 , 1 . I hope this time it is clear for all to understand what problem confront me . And again I am sorry for the trouble , thanks for you again ! Best Regard Bo

An algorithm problem

Hi , I have writen a python program to slove a problem described as below: (Forgive my poor English !) Put the 2^n 0 or 1 to form a ring , and we can select any continuous n ones from the ring to constitute a binary number . And obviously we can get 2^n selections , so the question is : Given a n

Re: reusing parts of a string in RE matches?

John Salerno 写道: > I probably should find an RE group to post to, but my news server at > work doesn't seem to have one, so I apologize. But this is in Python > anyway :) > > So my question is, how can find all occurrences of a pattern in a > string, including overlapping matches? I figure it ha

Re: Kross - Start of a Unified Scripting Approach

RM 写道: > This is from the new KOffice Announcement. > > http://www.koffice.org/announcements/announce-1.5.php > > '''This version of KOffice features a start of a unified scripting > solution called Kross. Kross provides cross-language support for > scripting (thus its name) and at present supports

Re: A question about the urllib2 ?

Serge Orlov 写道: > Bo Yang wrote: > >> Hi , >> Recently I use python's urllib2 write a small script to login our >> university gateway . >> Usually , I must login into the gateway in order to surf the web . So , >> every time I >> start my co

Re: A question about the urllib2 ?

Fuzzyman 写道: > Bo Yang wrote: > >> Hi , >> Recently I use python's urllib2 write a small script to login our >> university gateway . >> Usually , I must login into the gateway in order to surf the web . So , >> every time I >> start my computer ,

A question about the urllib2 ?

Hi , Recently I use python's urllib2 write a small script to login our university gateway . Usually , I must login into the gateway in order to surf the web . So , every time I start my computer , it is my first thing to do that open a browser to login the gateway ! So , I decide to write such a s

How can I get the text under the cusor ?

Hello , I want to develop an application to record some of the best words and ideas in the web when I surfing with the Firefox or IE . I would like the application have such a GUI : 1.it appear in the system tray area in the Windows ; 2.whenever I select some words (ether in an IE or MS word),I hop

Re: Learning different languages

Rich said : > Hi, > > (this is a probably a bit OT here, but comp.lang seems rather > desolated, so I'm not sure I would get an answer there. And right now > I'm in the middle of learning Python anyway so...) > > Anyway, my question is: what experience you people have with working > with different

Re: do design patterns still apply with Python?

Paul Novak : > A lot of the complexity of design patterns in Java falls away in > Python, mainly because of the flexibility you get with dynamic typing. > I agree with this very much ! In java or C++ or all such static typing and compiled languages , the type is fixed on in the compile phrase ,

Re: do design patterns still apply with Python?

Paul Novak 写道: > A lot of the complexity of design patterns in Java falls away in > Python, mainly because of the flexibility you get with dynamic typing. > I agree with this very much ! In java or C++ or all such static typing and compiled languages , the type is fixed on in the compile phrase ,

make a class instance from a string ?

Hi, I know in java , we can use class.ForName("classname") to get an instance of the class 'classname' from a string , in python , how do I do that ? Thanks in advance ! -- http://mail.python.org/mailman/listinfo/python-list

Re: How many web framework for python ?

Thank you very much ! -- http://mail.python.org/mailman/listinfo/python-list

How many web framework for python ?

Hello everybody , I am a student major in software engeering . I need to do something for my course . There are very good web framework for java and ruby , Is there one for python ? I want to write a web framework for python based on mod_python as my course homework , could you give some advise ?

about Frame.__init__(self)

.. the line "Frame.__init__(self)" puzzle me. why use it like this? can some one explain it? regards, yang -- http://mail.python.org/mailman/listinfo/python-list

about Frame.__init__(self)

.. the line "Frame.__init__(self)" puzzle me. why use it like this? can some one explain it? regards, yang -- http://mail.python.org/mailman/listinfo/python-list

Python v.s. c++

Hi, if i am already skillful with c++. Is it useful to learn python? thanks! -- http://mail.python.org/mailman/listinfo/python-list

Re: spawn* or exec* and fork, what should I use and how ?

Peter Hansen wrote: Lingyun Yang wrote: I want to use python as a "shell like" program, and execute an external program in it( such as mv, cp, tar, gnuplot) os.execv("/bin/bash",("/usr/bin/gnuplot",'-c "gnuplot < plot.tmp"')) I would sugges

spawn* or exec* and fork, what should I use and how ?

Hi, I want to use python as a "shell like" program, and execute an external program in it( such as mv, cp, tar, gnuplot) I tried: os.execv("/bin/bash",("/usr/bin/gnuplot",'-c "gnuplot < plot.tmp"')) since it's in a for-loop, it should be executed many times, but It exits after the first time runn