Can you introduce some book about python?

[fdsl ysnh]

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Today's Topics:

1. Re: appending key-value pairs to a dict (Peter
Hansen)
2. Re: Is Python suitable for a huge, enterprise
size app?
(Paul Rubin)
3. Re: appending key-value pairs to a dict (Brian
Beck)
4. Re: Comparing 2 similar strings? (Skip
Montanaro)
5. Re: Is Python suitable for a huge, enterprise
size app?
(Paul Rubin)
6. Re: buffer_info error (as*****@gmail.com)
7. Re: appending key-value pairs to a dict (James
Stroud)
8. From the call hook, how do I know more
precisely what is
called? (Vijay Kumar)
9. Re: PyGame and Rotozoom (Sorry if OT) (Lee
Harr)
10. Re: buffer_info error (Jp Calderone)
11. Re: appending key-value pairs to a dict (Roy
Smith)
12. Re: Is Python suitable for a huge, enterprise
size app?
(Dave Brueck)
13. Re: Process monitoring (John Abel)

·¢¼þÈË: Peter Hansen <pe***@engcorp.com>

ÊÕ¼þÈË: py*********@python.org
ÈÕÆÚ: Fri, 20 May 2005 16:12:17 -0400
Ö÷Ìâ: Re: appending key-value pairs to a dict

rbt wrote:

I know how to setup an empty list and loop thru

something... appending

to the list on each loop... how does this work

with dicts?

I'm looping thru a list of files and I want to put

the file's name and

its sha hash into a dict on each loop.

Whereas with a list you would call "append" in the
loop, with a
dictionary you simply use an indexed-assignment type
of access:

mydict = {}
for filename in some_list_of_filenames:
hash =
sha.sha(open(filename).read()).hexdigest() # or
whatever
mydict[filename] = hash

-Peter

·¢¼þÈË: Paul Rubin <http://ph****@NOSPAM.invalid>

ÊÕ¼þÈË: py*********@python.org
ÈÕÆÚ: 20 May 2005 13:12:50 -0700
Ö÷Ìâ: Re: Is Python suitable for a huge, enterprise
size app?

Dave Brueck <da**@pythonapocrypha.com> writes:

One thing from your experience that did resonate

with me is that,

except for ftplib and occasionally urllib (for

basic, one-shot GETs),

we don't use any of the standard library's

"protocol" modules - partly

because we had to implement our own HTTP libraries

for performance and

scalability reasons anyway, and partly because we

had trouble figuring

out e.g. all the ins and outs of

urllib/urllib2/httplib.

What do you use for HTTPS? And did you use the
Cookie module in your
HTTP servers? You may have had problems without
even being aware of
them (until recently if you used Cookie with its
default settings, any
attacker could completely take over your server by
sending you
carefully concoted cookies). I'm not trying to be
contentious here,
just mentioning a couple further cases of where
problems aren't
visible from far away but are there when you look
close.

·¢¼þÈË: Brian Beck <ex****@gmail.com>

ÊÕ¼þÈË: py*********@python.org
ÈÕÆÚ: Fri, 20 May 2005 16:14:17 -0400
Ö÷Ìâ: Re: appending key-value pairs to a dict

rbt wrote:

I know how to setup an empty list and loop thru

something... appending

to the list on each loop... how does this work

with dicts?

I'm looping thru a list of files and I want to put

the file's name and

its sha hash into a dict on each loop.

Like so:

d = {}
for filename in files:
d[sha_func(filename)] = filename
Or like so:

d = dict([(sha_func(filename), filename) for
filename in files])

--
Brian Beck
Adventurer of the First Order

·¢¼þÈË: Skip Montanaro <sk**@pobox.com>

³*ËÍ: py*********@python.org
ÊÕ¼þÈË: Steve Holden <st***@holdenweb.com>
ÈÕÆÚ: Fri, 20 May 2005 15:16:49 -0500
Ö÷Ìâ: Re: Comparing 2 similar strings?
Steve> (is this the same as 'Conchobar'?)

No, that's a trendy pub in Key West...

<wink>

Skip

·¢¼þÈË: Paul Rubin <http://ph****@NOSPAM.invalid>

ÊÕ¼þÈË: py*********@python.org
ÈÕÆÚ: 20 May 2005 13:15:48 -0700
Ö÷Ìâ: Re: Is Python suitable for a huge, enterprise
size app?

"Fredrik Lundh" <fr*****@pythonware.com> writes:

this has been reported before, and it won't get

fixed (unless you're

volunteering to add Python-compatible garbage

collection to Tk, that is).

Yeah, I think I understand what the issue is. I can
think of some
kludgy possible fixes but I assume they've been
thought about already
and rejected. The workaround of making the
application save an extra
reference isn't too bad, but all relevant docs that
say anything about
these images should mention the requirement
emphatically.

·¢¼þÈË: "as*****@gmail.com" <do*****@gmail.com>

ÊÕ¼þÈË: py*********@python.org
ÈÕÆÚ: 20 May 2005 13:18:33 -0700
Ö÷Ìâ: Re: buffer_info error

i am filling in a packet with source and destination
address and using
the buffer_info call to pass on the address to an
underlying low level
call.

The src and dest are strings, but buffer_info
expects an array. How do
i deal with this?

·¢¼þÈË: James Stroud <js*****@mbi.ucla.edu>

ÊÕ¼þÈË: py*********@python.org
ÈÕÆÚ: Fri, 20 May 2005 13:20:48 -0700
Ö÷Ìâ: Re: appending key-value pairs to a dict

On Friday 20 May 2005 01:04 pm, rbt wrote:

I know how to setup an empty list and loop thru

something... appending

to the list on each loop... how does this work

with dicts?

I'm looping thru a list of files and I want to put

the file's name and

its sha hash into a dict on each loop.

Many thanks,

rbt

Simple assignment.

adict[filename] = an_sha_hash

--
James Stroud
UCLA-DOE Institute for Genomics and Proteomics
Box 951570
Los Angeles, CA 90095

http://www.jamesstroud.com/

·¢¼þÈË: Vijay Kumar <ge******@gmail.com>

³*ËÍ: vs******@cs.nmsu.edu
ÊÕ¼þÈË: py*********@python.org
ÈÕÆÚ: Fri, 20 May 2005 14:21:33 -0600
Ö÷Ìâ: From the call hook, how do I know more
precisely what is called?

Hi,

I wrote a trace function using the profiling and
tracing hooks
provided by the python interpreter.

The Python interpreter reports the calls occuring in
the source
program to my trace function.

How can I know whether the call happened is a
function call or method
call and if it is a method call what is its self
object and/or class
is?.

I receive a frame object from the interpreter for
every call.

Thanks,
Vijay.

·¢¼þÈË: Lee Harr <le*@example.com>

ÊÕ¼þÈË: py*********@python.org
ÈÕÆÚ: Fri, 20 May 2005 20:38:45 GMT
Ö÷Ìâ: Re: PyGame and Rotozoom (Sorry if OT)

On 2005-05-20, J. W. McCall <jm*****@houston.rr.com>
wrote:

I'm not sure if this is off-topic, since it

doesn't deal with Python

itself, but here goes:

I'm messing around with writing a simple "game"

where the player (a

crudely drawn smiley face) moves by rotating and

moving back or forward

(think Resident Evil, but from an always-above

view). After much

hacking, I have it working where left and right

rotate the player sprite

and up always moves the sprite whichever direction

it's facing, while

down is reverse. I'm using

pygame.transform.RotoZoom().

My problem is that it doesn't rotate smoothly.

When it rotates, the

corners of the image (just a plain white

background) look like they're

hitting some barrier and making it move around.

Think of an empty box

turned diagonally (so that it looks like a

diamond, with its open end

facing you), and a cube in that box being turned

while it's resting in

the bottom corner. I want it to rotate smoothly

around its center, it's

it's not doing that.

I'm guessing that it has something to do with me

not setting up a Rect

right, but I'm not sure. Maybe this is a

limitation of Rotozoom/Rotate?

Any advice would be greatly appreciated. And yes,

I'm a rank PyGame newbie.

You might want to try pygsear:
http://www.nongnu.org/pygsear/

It has a RotatedImage class which takes care of
rotating
things for you. See the examples roti.py and
wings.py
for some use of rotated image sprites.

·¢¼þÈË: Jp Calderone <ex*****@divmod.com>

ÊÕ¼þÈË: py*********@python.org
ÈÕÆÚ: Fri, 20 May 2005 20:45:00 GMT
Ö÷Ìâ: Re: buffer_info error

On 20 May 2005 13:18:33 -0700, "as*****@gmail.com"
<do*****@gmail.com> wrote:

i am filling in a packet with source and

destination address and using

the buffer_info call to pass on the address to an

underlying low level

call.

The src and dest are strings, but buffer_info

expects an array. How do

i deal with this?

What's the low-level call you're invoking?

Jp

·¢¼þÈË: ro*@panix.com (Roy Smith)

ÊÕ¼þÈË: py*********@python.org
ÈÕÆÚ: 20 May 2005 16:50:39 -0400
Ö÷Ìâ: Re: appending key-value pairs to a dict

rbt <rb*@athop1.ath.vt.edu> wrote:

I know how to setup an empty list and loop thru

something... appending

to the list on each loop... how does this work with

dicts?

I'm looping thru a list of files and I want to put

the file's name and

its sha hash into a dict on each loop.

You just assign values to keys. If the key doesn't
exist, it's
created automagically. You want something like
this:

shaDict = {}
for fileName in fileNameList:
hash = generateShaHash (fileName)
shaDict[hash] = fileName

·¢¼þÈË: Dave Brueck <da**@pythonapocrypha.com>

ÊÕ¼þÈË: py*********@python.org
ÈÕÆÚ: Fri, 20 May 2005 15:07:05 -0600
Ö÷Ìâ: Re: Is Python suitable for a huge, enterprise
size app?

Paul Rubin wrote:

Dave Brueck <da**@pythonapocrypha.com> writes:

One thing from your experience that did resonate with me is that,except for ftplib and occasionally urllib (for basic, one-shot GETs),we don't use any of the standard library's "protocol" modules - partlybecause we had to implement our own HTTP libraries for performance andscalability reasons anyway, and partly because we had trouble figuringout e.g. all the ins and outs of

urllib/urllib2/httplib.

What do you use for HTTPS?

Hi Paul,

m2crypto (plus some patches to make asynchronous SSL
do what we needed).

And did you use the Cookie module in your
HTTP servers? You may have had problems without

even being aware of

them (until recently if you used Cookie with its

default settings, any

attacker could completely take over your server by

sending you

carefully concoted cookies).

Are you referring to the use of pickle for cookie
serialization? In any case, we
didn't use Cookie.py from the stdlib (on the
servers, nearly everything related
to URLs & HTTP was custom-built, with the exception
of urlparse, for the
aforemenioned reasons).

-Dave

·¢¼þÈË: John Abel <jo*******@btinternet.com>

³*ËÍ: py*********@python.org
ÈÕÆÚ: Fri, 20 May 2005 22:24:14 +0100
Ö÷Ìâ: Re: Process monitoring

gsteff wrote:

Hey, I'm working on a Python program that will

launch some other

non-Python process using os.spawn (in the

os.P_NOWAIT mode) and then

basically wait for it to finish (while doing some

other stuff in the

interim). Normally, the new process will signal

that it's done by

writing to a file, but I'd like to also find out if

the new process

died unexpectedly. Anyone know any preferrable

ways to do this?

Greg Steffensen

If you're using 2.4, have a look at the subprocess
module.

J

--

http://mail.python.org/mailman/listinfo/python-list

I am a beginner,Can you introduce some book about
python? I am a student of china

__________________________________________________ _______
Do You Yahoo!?
150ÍòÇúMP3·è¿ñËÑ£¬´øÄú´³ÈëÒôÀÖµîÌÃ
http://cn.rd.yahoo.com/mail_cn/tag/y...sic.yisou.com/
ÃÀÅ®Ã÷ÐÇÓ¦Óо¡ÓУ¬ËѱéÃÀͼ¡¢ÑÞͼºÍ¿áͼ
http://cn.rd.yahoo.com/mail_cn/tag/y...mage.yisou.com
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[rdsteph]

You m,igth try my page of Python Book reviews at
http://www.awaretek.com/book.html

Ron Stephens
fdsl ysnh wrote:

--- py*****************@python.org写�:

Send Python-list mailing list submissions to
py*********@python.org

To subscribe or unsubscribe via the World Wide Web,
visit
http://mail.python.org/mailman/listinfo/python-list
or, via email, send a message with subject or body
'help' to
py*****************@python.org

You can reach the person managing the list at
py***************@python.org

When replying, please edit your Subject line so it
is more specific
than "Re: Contents of Python-list digest..."

Today's Topics:
1. Re: appending key-value pairs to a dict (Peter
Hansen)
2. Re: Is Python suitable for a huge, enterprise
size app?
(Paul Rubin)
3. Re: appending key-value pairs to a dict (Brian
Beck)
4. Re: Comparing 2 similar strings? (Skip
Montanaro)
5. Re: Is Python suitable for a huge, enterprise
size app?
(Paul Rubin)
6. Re: buffer_info error (as*****@gmail.com)
7. Re: appending key-value pairs to a dict (James
Stroud)
8. From the call hook, how do I know more
precisely what is
called? (Vijay Kumar)
9. Re: PyGame and Rotozoom (Sorry if OT) (Lee
Harr)
10. Re: buffer_info error (Jp Calderone)
11. Re: appending key-value pairs to a dict (Roy
Smith)
12. Re: Is Python suitable for a huge, enterprise
size app?
(Dave Brueck)
13. Re: Process monitoring (John Abel)

�件人: Peter Hansen <pe***@engcorp.com>

收件人: py*********@python.org
日期: Fri, 20 May 2005 16:12:17 -0400
主题: Re: appending key-value pairs to a dict

rbt wrote:

I know how to setup an empty list and loop thru

something... appending

to the list on each loop... how does this work

with dicts?

I'm looping thru a list of files and I want to put

the file's name and

its sha hash into a dict on each loop.

Whereas with a list you would call "append" in the
loop, with a
dictionary you simply use an indexed-assignment type
of access:

mydict = {}
for filename in some_list_of_filenames:
hash =
sha.sha(open(filename).read()).hexdigest() # or
whatever
mydict[filename] = hash

-Peter

�件人: Paul Rubin <http://ph****@NOSPAM.invalid>

收件人: py*********@python.org
日期: 20 May 2005 13:12:50 -0700
主题: Re: Is Python suitable for a huge, enterprise
size app?

Dave Brueck <da**@pythonapocrypha.com> writes:

One thing from your experience that did resonate

with me is that,

except for ftplib and occasionally urllib (for

basic, one-shot GETs),

we don't use any of the standard library's

"protocol" modules - partly

because we had to implement our own HTTP libraries

for performance and

scalability reasons anyway, and partly because we

had trouble figuring

out e.g. all the ins and outs of

urllib/urllib2/httplib.

What do you use for HTTPS? And did you use the
Cookie module in your
HTTP servers? You may have had problems without
even being aware of
them (until recently if you used Cookie with its
default settings, any
attacker could completely take over your server by
sending you
carefully concoted cookies). I'm not trying to be
contentious here,
just mentioning a couple further cases of where
problems aren't
visible from far away but are there when you look
close.

�件人: Brian Beck <ex****@gmail.com>

收件人: py*********@python.org
日期: Fri, 20 May 2005 16:14:17 -0400
主题: Re: appending key-value pairs to a dict

rbt wrote:

I know how to setup an empty list and loop thru

something... appending

to the list on each loop... how does this work

with dicts?

I'm looping thru a list of files and I want to put

the file's name and

its sha hash into a dict on each loop.

Like so:

d = {}
for filename in files:
d[sha_func(filename)] = filename
Or like so:

d = dict([(sha_func(filename), filename) for
filename in files])

--
Brian Beck
Adventurer of the First Order

�件人: Skip Montanaro <sk**@pobox.com>

抄�: py*********@python.org
收件人: Steve Holden <st***@holdenweb.com>
日期: Fri, 20 May 2005 15:16:49 -0500
主题: Re: Comparing 2 similar strings?
Steve> (is this the same as 'Conchobar'?)

No, that's a trendy pub in Key West...

<wink>

Skip

�件人: Paul Rubin <http://ph****@NOSPAM.invalid>

收件人: py*********@python.org
日期: 20 May 2005 13:15:48 -0700
主题: Re: Is Python suitable for a huge, enterprise
size app?

"Fredrik Lundh" <fr*****@pythonware.com> writes:

this has been reported before, and it won't get

fixed (unless you're

volunteering to add Python-compatible garbage

collection to Tk, that is).

Yeah, I think I understand what the issue is. I can
think of some
kludgy possible fixes but I assume they've been
thought about already
and rejected. The workaround of making the
application save an extra
reference isn't too bad, but all relevant docs that
say anything about
these images should mention the requirement
emphatically.

�件人: "as*****@gmail.com" <do*****@gmail.com>

收件人: py*********@python.org
日期: 20 May 2005 13:18:33 -0700
主题: Re: buffer_info error

i am filling in a packet with source and destination
address and using
the buffer_info call to pass on the address to an
underlying low level
call.

The src and dest are strings, but buffer_info
expects an array. How do
i deal with this?

�件人: James Stroud <js*****@mbi.ucla.edu>

收件人: py*********@python.org
日期: Fri, 20 May 2005 13:20:48 -0700
主题: Re: appending key-value pairs to a dict

On Friday 20 May 2005 01:04 pm, rbt wrote:

I know how to setup an empty list and loop thru

something... appending

to the list on each loop... how does this work

with dicts?

I'm looping thru a list of files and I want to put

the file's name and

its sha hash into a dict on each loop.

Many thanks,

rbt

Simple assignment.

adict[filename] = an_sha_hash

--
James Stroud
UCLA-DOE Institute for Genomics and Proteomics
Box 951570
Los Angeles, CA 90095

http://www.jamesstroud.com/

�件人: Vijay Kumar <ge******@gmail.com>

抄�: vs******@cs.nmsu.edu
收件人: py*********@python.org
日期: Fri, 20 May 2005 14:21:33 -0600
主题: From the call hook, how do I know more
precisely what is called?

Hi,

I wrote a trace function using the profiling and
tracing hooks
provided by the python interpreter.

The Python interpreter reports the calls occuring in
the source
program to my trace function.

How can I know whether the call happened is a
function call or method
call and if it is a method call what is its self
object and/or class
is?.

I receive a frame object from the interpreter for
every call.

Thanks,
Vijay.

�件人: Lee Harr <le*@example.com>

收件人: py*********@python.org
日期: Fri, 20 May 2005 20:38:45 GMT
主题: Re: PyGame and Rotozoom (Sorry if OT)

On 2005-05-20, J. W. McCall <jm*****@houston.rr.com>
wrote:

I'm not sure if this is off-topic, since it

doesn't deal with Python

itself, but here goes:

I'm messing around with writing a simple "game"

where the player (a

crudely drawn smiley face) moves by rotating and

moving back or forward

(think Resident Evil, but from an always-above

view). After much

hacking, I have it working where left and right

rotate the player sprite

and up always moves the sprite whichever direction

it's facing, while

down is reverse. I'm using

pygame.transform.RotoZoom().

My problem is that it doesn't rotate smoothly.

When it rotates, the

corners of the image (just a plain white

background) look like they're

hitting some barrier and making it move around.

Think of an empty box

turned diagonally (so that it looks like a

diamond, with its open end

facing you), and a cube in that box being turned

while it's resting in

the bottom corner. I want it to rotate smoothly

around its center, it's

it's not doing that.

I'm guessing that it has something to do with me

not setting up a Rect

right, but I'm not sure. Maybe this is a

limitation of Rotozoom/Rotate?

Any advice would be greatly appreciated. And yes,

I'm a rank PyGame newbie.

You might want to try pygsear:
http://www.nongnu.org/pygsear/

It has a RotatedImage class which takes care of
rotating
things for you. See the examples roti.py and
wings.py
for some use of rotated image sprites.

�件人: Jp Calderone <ex*****@divmod.com>

收件人: py*********@python.org
日期: Fri, 20 May 2005 20:45:00 GMT
主题: Re: buffer_info error

On 20 May 2005 13:18:33 -0700, "as*****@gmail.com"
<do*****@gmail.com> wrote:

i am filling in a packet with source and

destination address and using

the buffer_info call to pass on the address to an

underlying low level

call.

The src and dest are strings, but buffer_info

expects an array. How do

i deal with this?

What's the low-level call you're invoking?

Jp

�件人: ro*@panix.com (Roy Smith)

收件人: py*********@python.org
日期: 20 May 2005 16:50:39 -0400
主题: Re: appending key-value pairs to a dict

rbt <rb*@athop1.ath.vt.edu> wrote:

I know how to setup an empty list and loop thru

something... appending

to the list on each loop... how does this work with

dicts?

I'm looping thru a list of files and I want to put

the file's name and

its sha hash into a dict on each loop.

You just assign values to keys. If the key doesn't
exist, it's
created automagically. You want something like
this:

shaDict = {}
for fileName in fileNameList:
hash = generateShaHash (fileName)
shaDict[hash] = fileName

�件人: Dave Brueck <da**@pythonapocrypha.com>

收件人: py*********@python.org
日期: Fri, 20 May 2005 15:07:05 -0600
主题: Re: Is Python suitable for a huge, enterprise
size app?

Paul Rubin wrote:

Dave Brueck <da**@pythonapocrypha.com> writes:

>One thing from your experience that did resonate

with me is that,

>except for ftplib and occasionally urllib (for

basic, one-shot GETs),

>we don't use any of the standard library's

"protocol" modules - partly

>because we had to implement our own HTTP libraries

for performance and

>scalability reasons anyway, and partly because we

had trouble figuring

>out e.g. all the ins and outs of

urllib/urllib2/httplib.

What do you use for HTTPS?

Hi Paul,

m2crypto (plus some patches to make asynchronous SSL
do what we needed).

And did you use the Cookie module in your
HTTP servers? You may have had problems without

even being aware of

them (until recently if you used Cookie with its

default settings, any

attacker could completely take over your server by

sending you

carefully concoted cookies).

Are you referring to the use of pickle for cookie
serialization? In any case, we
didn't use Cookie.py from the stdlib (on the
servers, nearly everything related
to URLs & HTTP was custom-built, with the exception
of urlparse, for the
aforemenioned reasons).

-Dave

�件人: John Abel <jo*******@btinternet.com>

抄�: py*********@python.org
日期: Fri, 20 May 2005 22:24:14 +0100
主题: Re: Process monitoring

gsteff wrote:

Hey, I'm working on a Python program that will

launch some other

non-Python process using os.spawn (in the

os.P_NOWAIT mode) and then

basically wait for it to finish (while doing some

other stuff in the

interim). Normally, the new process will signal

that it's done by

writing to a file, but I'd like to also find out if

the new process

died unexpectedly. Anyone know any preferrable

ways to do this?

Greg Steffensen

If you're using 2.4, have a look at the subprocess
module.

J

--

http://mail.python.org/mailman/listinfo/python-list

I am a beginner,Can you introduce some book about
python? I am a student of china

__________________________________________________ _______
Do You Yahoo!?
150万曲MP3疯狂æ�œï¼Œå¸¦æ‚¨é—¯å…¥éŸ³ä¹�殿å*‚

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[Heiko Wundram]

Am Samstag, 21. Mai 2005 08:59 schrieb rd*****@mac.com:

<snip>

Quoting a senseless quote, bravo!

...

wasting-bandwith-sure-is-fun-over-ISDN-'ly yours,

--
--- Heiko.
see you at: http://www.stud.mh-hannover.de/~hwundram/wordpress/

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[saddle]

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