Re: [Tutor] Mod_python greedy url matching
On Wed, 5 Oct 2005, Jay Loden wrote: I'm having trouble with Apache and Mod_python - mod_python is set to use /var/www/html and pass all *.htm files on to the handler I wrote. Unfortunately, mod_python does a greedy match, so /var/www/html/subdirectory/file.htm still gets passed to the handler! Is there some way to limit the handler to the directory and NOT include subdirectories? Hi Jay, You may want to ask the Apache folks about this one. Your question specific enough that the Apache folks will probably be better at this one than Python-Tutor. If you strip your question to its essentials, it really is an Apache configuration problem more than anything else; it really isn't related to Python except from the tangential relation to mod_python. The behavior you're seeing is how Apache deals with all Directory-specific directives: subdirectories acquire the properties of their parent directory. But from the notes in: http://httpd.apache.org/docs/2.0/sections.html http://httpd.apache.org/docs/2.0/mod/core.html#directory http://httpd.apache.org/docs/2.0/mod/mod_mime.html#removehandler it sounds possible for you to apply a RemoveHandler directive on the subdirectories of whatever parent directory you're trying not to handle. However, since we're really straying away from programming topics and into web-server system administration, I'd strongly recommend continuing this question on a mailing list like the one listed in: http://httpd.apache.org/lists.html#http-users ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
[Tutor] Line continuation with readlines
Hello, Is there a way to make line continuation work with the readlines function? i.e. this is \ one line. Thank you, Craig __ Yahoo! for Good Donate to the Hurricane Katrina relief effort. http://store.yahoo.com/redcross-donate3/ ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
[Tutor] Help Needed
Hello, I am trying to learn Python which I am brand new to. I have run into a problem that I would appreciate help with. When I am in Python Shell of the IDLE GUI, when I click Edit/Run Script, I am getting a dialog box that is titled Not saved and states The buffer for Python shell is not saved. Please save it first. With an OK button that just takes me back to the Shell window. I am going through a book (which suggests this resource as a good place to ask questions) and Edit/Run Script was working just fine the other day. I dont have a clue what is wrong or how to fix it. I have searched the Python.org website but was unable to find any reference to this. Any help would be greatly appreciated. Thanks very much, Steve [EMAIL PROTECTED] ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Line continuation with readlines
On Mon, 3 Oct 2005, Craig MacFarlane wrote: Is there a way to make line continuation work with the readlines function? i.e. this is \ one line. Hi Craig, readline() doesn't look at the content of lines, so no, not out of the box. However, would it be satisfactory if you wrote a function to define that behavior? Good luck to you! ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] FW: Help Needed
When I am in Python Shell of the IDLE GUI, when I click Edit/Run Script, I am getting a dialog box that is titled “Not saved” and states “The buffer for Python shell is not saved. Please save it first.” With an “OK” button that just takes me back to the Shell window. I am going through a book (which suggests this resource as a good place to ask questions) and Edit/Run Script was working just fine the other day. Go to File Save As... and save the file somewhere. Then attempt to run the script. If this still doesn't work, I'm stumped, but it really should... Dan ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Help Needed
hi, make sure in the option/general/Startup preferences/at startup/open edit windowoption/general/Startup preferences/autosave preferences/NoPrompt run the program by clicking F5 Cheers, pujo On 10/5/05, Steve Haley [EMAIL PROTECTED] wrote: Hello, I am trying to learn Python which I am brand new to. I have run into a problem that I would appreciate help with. When I am in Python Shell of the IDLE GUI, when I click Edit/Run Script, I am getting a dialog box that is titled "Not saved" and states "The buffer for Python shell is not saved. Please save it first." With an "OK" button that just takes me back to the Shell window. I am going through a book (which suggests this resource as a good place to ask questions) and Edit/Run Script was working just fine the other day. I don't have a clue what is wrong or how to fix it. I have searched the Python.org website but was unable to find any reference to this. Any help would be greatly appreciated. Thanks very much, Steve [EMAIL PROTECTED] ___Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
[Tutor] need help to understand terms for desinging a program
Hi, I need to make a program which will accomplish following. I dont need the code. I want to make it myself. But I need guidance from you people because I am not a good programmer. I need help in understanding following terms. qmail-queue reads a mail message from descriptor 0. It then reads envelope information from descriptor 1. It places the message into the outgoing queue for future delivery by qmail-send. The envelope information is an envelope sender address followed by a list of envelope recipient addresses. The sender address is preceded by the letter F and terminated by a 0 byte. Each recipient address is preceded by the letter T and terminated by a 0 byte. The list of recipi- ent addresses is terminated by an extra 0 byte. If qmail- queue sees end-of-file before the extra 0 byte, it aborts without placing the message into the queue. I want to inspect messages before passing them to actuall qmail-queue program. Thanks in advance for your help. -- Regards, Hameed U. Khan Registered Linux User #: 354374 ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] need help to understand terms for desinging a program
This is a pretty big question, and it would be easier to answer if you can give us more details about what you want to do. It seems you want to inspect outgoing mails (possibly rewrite their addresses?) before the mails are sent out. If you are looking to send out emails to a list then I suggest looking at mailman - a python mailing list manager. If you want to use python to examine mail messages and do not care what mailserver (MTA) you use you could try exim instead of qmail and then try exim-python. http://botanicus.net/dw/exim-python/exim-4.32py1.html On 10/5/05, Hameed U. Khan [EMAIL PROTECTED] wrote: Hi, I need to make a program which will accomplish following. I dont need the code. I want to make it myself. But I need guidance from you people because I am not a good programmer. I need help in understanding following terms. qmail-queue reads a mail message from descriptor 0. It then reads envelope information from descriptor 1. It places the message into the outgoing queue for future delivery by qmail-send. The envelope information is an envelope sender address followed by a list of envelope recipient addresses. The sender address is preceded by the letter F and terminated by a 0 byte. Each recipient address is preceded by the letter T and terminated by a 0 byte. The list of recipi- ent addresses is terminated by an extra 0 byte. If qmail- queue sees end-of-file before the extra 0 byte, it aborts without placing the message into the queue. I want to inspect messages before passing them to actuall qmail-queue program. Thanks in advance for your help. -- Regards, Hameed U. Khan Registered Linux User #: 354374 ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor -- -- Paul Brian m. 07875 074 534 t. 0208 352 1741 ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] FW: Help Needed
When I am in Python Shell of the IDLE GUI, when I click Edit/Run You shouldn't be running scripts when in the shell, it executes them immediately. You use edit/run when working in a script file window. HTH, Alan G ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
[Tutor] How to strip both single and double quotes
I'm writing a script that takes any text and outputs to a file a list of
duples (k, word) where k is the number of occurrences of word in the text.
The text will contain words beginning or ending with non-alphabetic
characters. To strip them off I use string.strip([chars]). My question is
how to use strip just once to get rid of both kinds of quotes, single and
double. It seems necessary to do it something like this:
# L is the original list of words in the text.
newL = []
for word in L:
word = lower(word)
newWord = word.strip(.,!?;:*'=-/#@)()
newWord2 = newWord.strip('.,!?;:*=-/#@)(')
word = newWord2
newL.append(word)
But is it? Have I missed something?
Thanks,
Dick Moores
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Re: [Tutor] Trying to prevent ftplib from locking my script
Andrew P wrote: Normally I wouldn't pipe up here because threads really can be very tricky. But check out: http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/435883 I use this recipe, originally from Python in a Nutshell, all the time, to solve exactly your problem. Slow network stuff that I don't have to/want to babysit. There are also several recipes showing how to use a worker thread from a GUI program, for example this one: http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/82965 Kent ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] htmllib
You're like some kind of god! That's exactly what I need. Thanks Ed On 05/10/05, Kent Johnson [EMAIL PROTECTED] wrote: Ed Singleton wrote: I want to dump a html file into a python object. Each nested tag would be a sub-object, attributes would be properties. So that I can use Python in a similar way to the way I use JavaScript within a web page. I don't know of a way to run Python from within a web page. But if you want to fetch an HTML page from a server and work with it (for example a web-scraping app), many people use BeautifulSoup for this. If you have well-formed HTML or XHTML you can use an XML parser as well but BS has the advantage of coping with badly-formed HTML. http://www.crummy.com/software/BeautifulSoup/ Kent ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] How to strip both single and double quotes
Alan Gauld wrote at 04:38 10/5/2005:
how to use strip just once to get rid of both kinds of quotes, single
and
double. It seems necessary to do it something like this:
JUst escape the quote character:
s.strip('\'')
That did it!
Thanks,
Dick Moores
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Re: [Tutor] Consistant Overhead Byte Stuffing (COBS) algorithm help
Michael Cotherman wrote:
I am a noob to converting pointers in C++ to arrays in
python, although the first time I see it done, I will
have no problem. Can you help converting the below
(what I think is the 'decoder' section) to python?
OK I'll bite. Your code is copying from a src buffer to a dst buffer. The src
buffer has a count byte followed by count-1 bytes of data. If the count is less
that 0xFF, a zero byte has to be inserted into the dst. So the decode loop gets
a count, copies that many bytes to the dst buffer, then optionally appends a 0.
Python doesn't have a direct equivalent to this sort of manipulation of memory
pointers and raw memory buffers. They are commonly replaced by strings or
lists. My function takes a string as an input argument, builds the output as
string fragments in a list, then builds a string to return.
Note that Python strings include an implicit length so there is no need to pass
and return a length argument.
I included a test case with the data from your previous email. Your data is
evidently hex-encoded as well as COBS encoded - in other words your strings are
hex values where each two chars represent a single byte. I have converted to
and from byte strings to feed this to the decoder.
Kent
PS Please send your replies to the whole list, not to me personally. Thanks!
def unstuff(src):
# src is a COBS compressed string
current = 0 # index into src
dst = []# a list that will build the result
while current len(src):
# Get the count and convert it to an integer
count = ord(src[current])
# Append count-1 chars from src to dst
dst.append(src[current+1:current+count])
# Do we need to add a zero byte?
if count 0xFF:
dst.append('\x00')
# Bump the counter and continue
if count0:
current += count
else:
current += 1
# dst is a list of string fragments; this converts it to a single string
return ''.join(dst)
def hexToString(hexStr):
''' Convert a string of two-digit hex values to a string of bytes with
those values '''
return ''.join([chr(int(hexStr[i:i+2], 16)) for i in range(0, len(hexStr),
2)])
def stringToHex(src):
''' Convert a byte string to a string of two-digit hex values '''
return ''.join([ '%02x' % ord(s) for s in src ])
if __name__ == '__main__':
data = '0002860104DB203F0100'
print data
data = hexToString(data)
print
newData = unstuff(data)
print stringToHex(newData)
UINT CCobsPackets::UnStuffData(unsigned char *src,
unsigned char *dst, UINT length)
{
unsigned char *dstStart = dst;
unsigned char *end = src + length;
while (src end)
{
int i, code = *src++;
for (i=1; icode; i++)
{
*dst++ = *src++;
}
if (code 0xFF)
{
*dst++ = 0;
}
}
return (UINT)(dst - dstStart);
}
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[Tutor] [Fwd: Re: Consistant Overhead Byte Stuffing (COBS) algorithm help]
Forwarding to the list
Original Message
Subject: Re: [Tutor] Consistant Overhead Byte Stuffing (COBS) algorithm help
Date: Tue, 4 Oct 2005 13:20:18 -0700 (PDT)
From: Michael Cotherman [EMAIL PROTECTED]
To: Kent Johnson [EMAIL PROTECTED]
Thanks for the response, the .NET code is really a
cluster, the whole cobs.cpp is below if needed. I
would think just by following the spec I could write a
cleaner program..
I am a noob to converting pointers in C++ to arrays in
python, although the first time I see it done, I will
have no problem. Can you help converting the below
(what I think is the 'decoder' section) to python?
even just comments to what is going on at each line...
-mike
UINT CCobsPackets::UnStuffData(unsigned char *src,
unsigned char *dst, UINT length)
{
unsigned char *dstStart = dst;
unsigned char *end = src + length;
while (src end)
{
int i, code = *src++;
for (i=1; icode; i++)
{
*dst++ = *src++;
}
if (code 0xFF)
{
*dst++ = 0;
}
}
return (UINT)(dst - dstStart);
}
/
// includes
/
#include stdafx.h
#include CobsPackets.h
/
// defines
/
/
// global data
/
// Register the standard CCobsPackets COM message
const UINT CCobsPackets::mg_nDefaultCobsMsg =
::RegisterWindowMessage(_T(CCobsPackets_DefaultCobsMsg));
///
///
// class CCobsPackets
///
///
CCobsPackets::CCobsPackets()
{
m_hMsgWnd = 0;
m_nCobsMsg = 0;
m_lParam = 0;
m_nMaxPacketSize = 0;
m_pInPacketData = NULL;
m_nInPacketPos = 0;
}
CCobsPackets::~CCobsPackets()
{
if (m_pInPacketData){
delete []m_pInPacketData;
m_pInPacketData = NULL;
}
while (!m_InPacketList.IsEmpty())
{
ListPacket *delPacket = (ListPacket
*)m_InPacketList.RemoveTail();
if (delPacket)
{
if (delPacket-packetData){
delete [](delPacket-packetData);
delPacket-packetData = NULL;
}
delete delPacket;
}
}
while (!m_OutPacketList.IsEmpty())
{
ListPacket *delPacket = (ListPacket
*)m_OutPacketList.RemoveTail();
if (delPacket)
{
if (delPacket-packetData){
delete [](delPacket-packetData);
delPacket-packetData = NULL;
}
delete delPacket;
}
}
}
bool CCobsPackets::Init(HWND hwndDest, UINT nCobsMsg,
LPARAM lParam, UINT nMaxPacketSize)
{
m_hMsgWnd = hwndDest;
m_nCobsMsg = nCobsMsg?nCobsMsg:mg_nDefaultCobsMsg;
m_lParam = lParam;
m_nMaxPacketSize = nMaxPacketSize;
m_nInPacketPos = 0;
if (m_pInPacketData){
delete []m_pInPacketData;
m_pInPacketData = NULL;
}
m_pInPacketData = new unsigned
char[m_nMaxPacketSize];
//TRACE0(create m_pInPacketData\n);
if (!m_pInPacketData)
return false;
return true;
}
ListPacket* CCobsPackets::NewPacket()
{
ListPacket *newPacket = NULL;
if (m_nMaxPacketSize)
{
newPacket = new ListPacket;
if (newPacket)
{
newPacket-packetData = new unsigned
char[m_nMaxPacketSize];
if (newPacket-packetData)
{
newPacket-packetLength = 0;
memset(newPacket-packetData, 0x00,
m_nMaxPacketSize);
}
else
{
delete newPacket;
newPacket = NULL;
}
}
}
return newPacket;
}
void CCobsPackets::SendEvent
Re: [Tutor] [Fwd: Re: Consistant Overhead Byte Stuffing (COBS)algorithm help]
I am a noob to converting pointers in C++ to arrays in
python, although the first time I see it done, I will
have no problem. Can you help converting the below
(what I think is the 'decoder' section) to python?
It won't be working code but I think this is whats happening...
UINT CCobsPackets::UnStuffData(unsigned char *src,
unsigned char *dst, UINT length)
def UnStuffData(src,dst,len):
{
unsigned char *dstStart = dst;
unsigned char *end = src + length;
# I don't think these are needed for Pyhon.
while (src end)
for code in src:
{
int code = *src++;
for (int i=1; icode; i++)
{
*dst++ = *src++;
}
for i in range(1,code):
dst.append(i)
if (code 0xFF)
{
*dst++ = 0;
}
if code 0xff
dst.append('\0') # may not be needed in python...
}
return (UINT)(dst - dstStart);
}
This looks odd, I don't think I understand what it does.
It seems to return an address thats potentially (probably?!)
before the start of the original dst...
I think it should probably translate to
return dst
Does that help?
Alan G
Author of the learn to program web tutor
http://www.freenetpages.co.uk/hp/alan.gauld
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Re: [Tutor] [Fwd: Re: Consistant Overhead Byte Stuffing (COBS)algorithm help]
Alan Gauld wrote: return (UINT)(dst - dstStart); } This looks odd, I don't think I understand what it does. It seems to return an address thats potentially (probably?!) before the start of the original dst... It's returning the length of dst. Kent ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Line continuation with readlines
At 07:20 PM 10/3/2005, Craig MacFarlane wrote:
Hello,
Is there a way to make line continuation work with
the readlines function?
i.e.
Do you mean e.g.?
this is \
one line.
I assume the above is a 2 line file you wish to read using a file object's
readlines method. There is nothing native to help you. I suggest you use
the read method, then remove any sequence of \ followed by \n then split at \n.
input = file('c:/foo.txt').read()
input2 = input.replace('\\\n', '')
input3 = input2.split('\n')
Now you have a list of logical lines. Note there are no \n at the end.
readlines leaves the \n at the end of the lines.
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Re: [Tutor] [Fwd: Re: Consistant Overhead Byte Stuffing (COBS)algorithm help]
This is exactly what i was looking for
For those following, the \x00 added at the end of the
packet is just imaginary and represents
in the meantime, I made the following that just
'decobs' a series of packets (only 8-10 bytes) that
are coming in over the com port. (my incoming packets
also begin with x00 for some reason)
It accurately decodes that data stream (same result as
when I esc out and connect with the dev kit program)
I need to use what you have given me to make it
scalable for size
#!/usr/bin/env python
#MJC 20051004
baudrate = 115200
port = 'com4'
echo = 1
convert_outgoing_cr = 1
import sys, serial, threading
s = serial.Serial(port,baudrate)
def reader():
loop forever and copy serial-console
cobspacket = [0,0,0,0,0,0,0,0,0,0]
while 1:
i = 0
cobschar = s.read()
cobspacket[i] = ord(cobschar)
if cobschar == '\x00':
cobschar = s.read()
cobspacket[i] = ord(cobschar)
codebyte = int(cobspacket[i])
while cobschar != '\x00':
if i == codebyte:
d = 0
codebyte = codebyte +
cobspacket[i]
else:
d = cobspacket[i]
if i0:
sys.stdout.write('%02X' % (d))
i+=1
cobschar = s.read()
cobspacket[i] = ord(cobschar)
sys.stdout.write('\n')
def writer():
loop forever and copy console-serial
while 1:
c = getkey()
if c == '\x1b': break #exit on esc
s.write(c) #send character
if convert_outgoing_cr and c == '\r':
s.write('\n')
if echo: sys.stdout.write('\n')
print --- Mikey's interface --- type ESC to quit
#start serial-console thread
r = threading.Thread(target=reader)
r.setDaemon(1)
r.start()
#enter console-serial loop
writer()
print \n--- exit ---
--- Alan Gauld [EMAIL PROTECTED] wrote:
I am a noob to converting pointers in C++ to
arrays in
python, although the first time I see it done, I
will
have no problem. Can you help converting the below
(what I think is the 'decoder' section) to python?
It won't be working code but I think this is whats
happening...
UINT CCobsPackets::UnStuffData(unsigned char *src,
unsigned char *dst, UINT length)
def UnStuffData(src,dst,len):
-snip-
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Re: [Tutor] [Fwd: Re: Consistant Overhead Byte Stuffing (COBS)algorithm help]
def UnStuffData(src,dst,len):
for code in src:
for i in range(1,code):
dst.append(i)
if code 0xff
dst.append('\0')
the above is the below code uncommented...
it(and the original code) just seem to find the end
and puts a zero there...
I do not see the existing zeroes replaced. this is
kinda why I wanted to start from the specification...
here is how i see the laymans verson of the spec:
get a packet (or the first 254 bytes of it)
if 254 bytes, put an FF in front of them and send it
on its way as a 255 byte packet, repeat this until
less than 254 bytes remain.
Place a byte in front of the packet that is equal to
the count until the first x00 byte is found. At the
location where that x00 byte was, put the count until
the next x00 byte... and so on and so on... (this is
where the imaginary x00 at the end comes in)
decoding is:
pop the first byte of the packet off and place
subsequent bytes into the output until you get to the
byte pointed to by the popped byte. When you reach
that byte, read its value as the new 'relative'
pointer, and copy x00 to the output. Proceed as above,
placing bytes to the output until the relative pointer
is reached or the end of the packet occurrs.
I guess I need to look if I wish for this part of the
program to handle the input as one big existing
string, or work on it a byte at a time as it comes in.
-mike c
--- Alan Gauld [EMAIL PROTECTED] wrote:
I am a noob to converting pointers in C++ to
arrays in
python, although the first time I see it done, I
will
have no problem. Can you help converting the below
(what I think is the 'decoder' section) to python?
It won't be working code but I think this is whats
happening...
UINT CCobsPackets::UnStuffData(unsigned char *src,
unsigned char *dst, UINT length)
def UnStuffData(src,dst,len):
{
unsigned char *dstStart = dst;
unsigned char *end = src + length;
# I don't think these are needed for Pyhon.
while (src end)
for code in src:
{
int code = *src++;
for (int i=1; icode; i++)
{
*dst++ = *src++;
}
for i in range(1,code):
dst.append(i)
if (code 0xFF)
{
*dst++ = 0;
}
if code 0xff
dst.append('\0') # may not be needed in
python...
}
return (UINT)(dst - dstStart);
}
This looks odd, I don't think I understand what it
does.
It seems to return an address thats potentially
(probably?!)
before the start of the original dst...
I think it should probably translate to
return dst
Does that help?
Alan G
Author of the learn to program web tutor
http://www.freenetpages.co.uk/hp/alan.gauld
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[Tutor] New Python book
Magnus Lie Hetland's new book, _Beginning Python: From Novice to Professional_ was published by Apress on Sept. 26 (in the U.S.). Very much worth a look, IMHO. But what do the tutors think? http://www.bestbookdeal.com/book/compare/159059519X Dick Moores [EMAIL PROTECTED] ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
[Tutor] Console output
Does anyone know how I can update a line of console output without creating a new line? I'm not explaning this too well, so here's an example. When you download a file with wget, the console display looks like this: 14% [=== ] 344,192 16.28K/s ETA 02:19 All the figures and the progress bar get continously updated. The only way I know of sending output to the console is to use print or sys.stdout.write(), but that would give me: 14% [=== ] 344,192 16.28K/s ETA 02:19 18% [= ] 344,192 16.28K/s ETA 02:19 20% [ ] 344,192 16.28K/s ETA 02:19 ...and that's really not what I'm after! Any help and ideas would be appreciated Olly ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] New Python book
Kent Johnson wrote: Dick Moores wrote: Magnus Lie Hetland's new book, _Beginning Python: From Novice to Professional_ was published by Apress on Sept. 26 (in the U.S.). Very much worth a look, IMHO. But what do the tutors think? http://www.bestbookdeal.com/book/compare/159059519X This seems to be an update to his previous book, Practical Python, rather than a completely new book. The TOC is almost identical. I haven't read the earlier book, either, so I don't have an opinion. The same sample chapter is available for each if anyone wants to compare. (see www.apress.com) Kent Has he at least changed the GUI chapters away from AnyGUI to one of the standard toolkits? The last edition would have been more use to me if it didn't do all of its GUI programming in a toolkit that the author has removed from circulation. Andy ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Console output
Oliver Maunder wrote:
Does anyone know how I can update a line of console output without
creating a new line? I'm not explaning this too well, so here's an example.
When you download a file with wget, the console display looks like this:
14% [===]
344,192 16.28K/sETA 02:19
All the figures and the progress bar get continously updated. The only
way I know of sending output to the console is to use print or
sys.stdout.write(), but that would give me:
14% [===]
344,192 16.28K/sETA 02:19
18% [= ]
344,192 16.28K/sETA 02:19
20% []
344,192 16.28K/sETA 02:19
...and that's really not what I'm after!
Any help and ideas would be appreciated
You need to:
- not write a newline
- backup to the beginning of the line
Simple example:
import sys
import time
def progress(n):
for i in range(n+1):
sys.stdout.write('\r%3s%% [%s%s]' % (i, '='*i, ' '*(n-i)))
sys.stdout.flush()
time.sleep(0.5)
progress(60)
No newline is written, and the program backs up to the beginning of the
line using carriage return, '\r'. You can also put the carriage return
at the end of the line; the difference is that the cursor will be left
at the beginning of the line instead of at the end.
It's also possible to back up using backspaces ('\b'), but then you need
to count how many characters you wrote and use the equal amount of
backslashes.
--
If I have been able to see further, it was only because I stood
on the shoulders of giants. -- Isaac Newton
Roel Schroeven
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Re: [Tutor] need help to understand terms for desinging a program
On 10/5/05, paul brian [EMAIL PROTECTED] wrote: This is a pretty big question, and it would be easier to answer if you can give us more details about what you want to do. It seems you want to inspect outgoing mails (possibly rewrite their addresses?) before the mails are sent out. If you are looking to send out emails to a list then I suggest looking at mailman - a python mailing list manager. If you want to use python to examine mail messages and do not care what mailserver (MTA) you use you could try exim instead of qmail and then try exim-python. http://botanicus.net/dw/exim-python/exim-4.32py1.html On 10/5/05, Hameed U. Khan [EMAIL PROTECTED] wrote: Hi, I need to make a program which will accomplish following. I dont need the code. I want to make it myself. But I need guidance from you people because I am not a good programmer. I need help in understanding following terms. qmail-queue reads a mail message from descriptor 0. It then reads envelope information from descriptor 1. It places the message into the outgoing queue for future delivery by qmail-send. The envelope information is an envelope sender address followed by a list of envelope recipient addresses. The sender address is preceded by the letter F and terminated by a 0 byte. Each recipient address is preceded by the letter T and terminated by a 0 byte. The list of recipi- ent addresses is terminated by an extra 0 byte. If qmail- queue sees end-of-file before the extra 0 byte, it aborts without placing the message into the queue. I want to inspect messages before passing them to actuall qmail-queue program. Thanks in advance for your help. -- Regards, Hameed U. Khan Registered Linux User #: 354374 ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor -- -- Paul Brian m. 07875 074 534 t. 0208 352 1741 Thanks paul for you quick reply but I have to stick with qmail. I want to check envelopes when user attempts to send message. Because our company want to restrict some users to send message to selected domains only. I've been given this task. Anyway thanks again for your time. -- Regards, Hameed U. Khan Registered Linux User #: 354374 - *Computer without Linux is just like the world without computer.* ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Console output
Just what I needed - thanks everyone. I never realised '\r' was actually good for something other than Windows line breaks! Olly ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
[Tutor] Accessing Variables
Dear List, I'm trying to clarify something about accessing variables. If I have ONE.py file with some variable a, and ONE imports TWO, which has a variable b, can TWO access variable a (I don't think so, but I just thought I'd check). I guess the way round this is just to make some classes objects, and then they can easily pass parameters to each other, but I just thought I'd check. Matt ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] need help to understand terms for desinging a program
I would suggest that you look firstly at qmails own built in ruleset. something like that must be achieveable without writing a special plugin. qmail control files are usually in /var/qmail/control. Nothing obvious in the man pages i am afraid. Good luck On 10/5/05, Hameed U. Khan [EMAIL PROTECTED] wrote: On 10/5/05, paul brian [EMAIL PROTECTED] wrote: This is a pretty big question, and it would be easier to answer if you can give us more details about what you want to do. It seems you want to inspect outgoing mails (possibly rewrite their addresses?) before the mails are sent out. If you are looking to send out emails to a list then I suggest looking at mailman - a python mailing list manager. If you want to use python to examine mail messages and do not care what mailserver (MTA) you use you could try exim instead of qmail and then try exim-python. http://botanicus.net/dw/exim-python/exim-4.32py1.html On 10/5/05, Hameed U. Khan [EMAIL PROTECTED] wrote: Hi, I need to make a program which will accomplish following. I dont need the code. I want to make it myself. But I need guidance from you people because I am not a good programmer. I need help in understanding following terms. qmail-queue reads a mail message from descriptor 0. It then reads envelope information from descriptor 1. It places the message into the outgoing queue for future delivery by qmail-send. The envelope information is an envelope sender address followed by a list of envelope recipient addresses. The sender address is preceded by the letter F and terminated by a 0 byte. Each recipient address is preceded by the letter T and terminated by a 0 byte. The list of recipi- ent addresses is terminated by an extra 0 byte. If qmail- queue sees end-of-file before the extra 0 byte, it aborts without placing the message into the queue. I want to inspect messages before passing them to actuall qmail-queue program. Thanks in advance for your help. -- Regards, Hameed U. Khan Registered Linux User #: 354374 ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor -- -- Paul Brian m. 07875 074 534 t. 0208 352 1741 Thanks paul for you quick reply but I have to stick with qmail. I want to check envelopes when user attempts to send message. Because our company want to restrict some users to send message to selected domains only. I've been given this task. Anyway thanks again for your time. -- Regards, Hameed U. Khan Registered Linux User #: 354374 - *Computer without Linux is just like the world without computer.* -- -- Paul Brian m. 07875 074 534 t. 0208 352 1741 ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Accessing Variables
What you can do is if ONE.py has a class with the variable a, in it, you can pass the class instance (ie. self) and then you can call any function or get any global class variable. eg def foo(parent): print parent.aOn 05/10/05, Matt Williams [EMAIL PROTECTED] wrote: Dear List,I'm trying to clarify something about accessing variables.If I have ONE.py file with some variable a, and ONE imports TWO, whichhas a variable b, can TWO access variable a (I don't think so, but Ijust thought I'd check).I guess the way round this is just to make some classes objects, and then they can easily pass parameters to each other, but I just thoughtI'd check.Matt___Tutor maillist-Tutor@python.org http://mail.python.org/mailman/listinfo/tutor ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Handling Objects
Eric Walker wrote:
New to Python and trying to do some class stuff with a simple task.
Problem:
1) get a list of file names in a directory
2) create variables with the same name of each filename pulled from the
directory.
3) Create an object for each and pass into the __init__ method the stringname
of the file name.
This way I get a collection of objects that are the same name as the file
name
and within each instance of the class , a particular attribute will have the
string name of the object. Hope this isn't too confusing.. example.
What will you do with the names and objects once you have them? A better
approach is probably to keep a dictionary that maps names to objects. If your
object is really just storing the name you might as well just keep a list of
names - the object isn't adding any value. If the object is going to have more
behaviour then use a dict. If you really just want to print the names then you
don't need to store them at all. For example with a dict:
class TPROJ:
# as before
def getNames():
import os
currentDir=os.getcwd()
temp=currentDir + '/TEMP'
os.chdir(temp)
baseList=os.listdir(.)
nameDict = {}
for name in baseList:
nameDict[name] = TPROJ(name)
print name
return nameDict
HTH,
Kent
class TPROJ:
def __init__(self,value):#createMethod auto executes since it has __
self.BASENAME = value
def display(self):#display method
print self.BASENAME
def getNames():
import os
currentDir=os.getcwd()
temp=currentDir + '/TEMP'
os.chdir(temp)
baseList=os.listdir(.)
for name in baseList:
name = TPROJ(name)
print name
Can anyone see what I am trying to do?
Python Newbie...
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Re: [Tutor] Accessing Variables
Matt Williams wrote: Dear List, I'm trying to clarify something about accessing variables. If I have ONE.py file with some variable a, and ONE imports TWO, which has a variable b, can TWO access variable a (I don't think so, but I just thought I'd check). You are right. TWO can import ONE to get access to ONE.a but circular imports are usually a bad idea and can cause subtle bugs. I guess the way round this is just to make some classes objects, and then they can easily pass parameters to each other, but I just thought I'd check. That is a good solution. An alternative is to make a module THREE that both ONE and TWO import. Kent Matt ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Handling Objects
Well,
I think I probably can do this easier in perl but I took a vow I would try and
learn python. I know I am using classes here and really don't need objects.
This is just another way for me to learn how to work with classes within
python. My object actually will be storing like 5 or 6 different attributes
but I didn't include them in the example. These attributes will be certain
things that are read from the file. Once I get the objects i want to create
in another directory the same files with the same names but put different
data into the new files depending on what I read from the original files.
Python Newbie
On Wednesday 05 October 2005 04:29 pm, Kent Johnson wrote:
Eric Walker wrote:
New to Python and trying to do some class stuff with a simple task.
Problem:
1) get a list of file names in a directory
2) create variables with the same name of each filename pulled from the
directory.
3) Create an object for each and pass into the __init__ method the
stringname of the file name.
This way I get a collection of objects that are the same name as the file
name and within each instance of the class , a particular attribute will
have the string name of the object. Hope this isn't too confusing..
example.
What will you do with the names and objects once you have them? A better
approach is probably to keep a dictionary that maps names to objects. If
your object is really just storing the name you might as well just keep a
list of names - the object isn't adding any value. If the object is going
to have more behaviour then use a dict. If you really just want to print
the names then you don't need to store them at all. For example with a
dict:
class TPROJ:
# as before
def getNames():
import os
currentDir=os.getcwd()
temp=currentDir + '/TEMP'
os.chdir(temp)
baseList=os.listdir(.)
nameDict = {}
for name in baseList:
nameDict[name] = TPROJ(name)
print name
return nameDict
HTH,
Kent
class TPROJ:
def __init__(self,value):#createMethod auto executes since it has __
self.BASENAME = value
def display(self):#display method
print self.BASENAME
def getNames():
import os
currentDir=os.getcwd()
temp=currentDir + '/TEMP'
os.chdir(temp)
baseList=os.listdir(.)
for name in baseList:
name = TPROJ(name)
print name
Can anyone see what I am trying to do?
Python Newbie...
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--
Eric Walker
EDA/CAD Engineer
Work: 208-368-2573
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Re: [Tutor] [Fwd: Re: Consistant Overhead Byte Stuffing (COBS)algorithm help]
Michael Cotherman wrote:
def UnStuffData(src,dst,len):
for code in src:
for i in range(1,code):
dst.append(i)
if code 0xff
dst.append('\0')
the above is the below code uncommented...
it(and the original code) just seem to find the end
and puts a zero there...
I do not see the existing zeroes replaced. this is
kinda why I wanted to start from the specification...
The above is the decoding code, it does what you describe below. It is adding
the zeros back in, that is the dst.append('\0')
Kent
decoding is:
pop the first byte of the packet off and place
subsequent bytes into the output until you get to the
byte pointed to by the popped byte. When you reach
that byte, read its value as the new 'relative'
pointer, and copy x00 to the output. Proceed as above,
placing bytes to the output until the relative pointer
is reached or the end of the packet occurrs.
I guess I need to look if I wish for this part of the
program to handle the input as one big existing
string, or work on it a byte at a time as it comes in.
-mike c
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Re: [Tutor] How to write this to a file?
Dick Moores wrote: I have a script that writes it's output to a file. I also print the time with print Time was %.4g seconds % (timeEnd - timeStart) How could I also have the same output of the print expression, written to the file? The formatting part of the print is just an expression with a string value, you can assign it to a variable and write it to your file. You might want to add a newline: timeMsg = Time was %.4g seconds\n % (timeEnd - timeStart) f.write(timeMsg) If you have a lot of output that you want to put to the console and to a log file you might like to look at the logging module. A single line of logging can be written to multiple places by the module. Kent ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
