okay. I got the subprocess bit to work and i have os walk doing its walk. But
now for something i did not think about until i started to think about how to
fit these two bits to work together.
os walk is going to traverse my dirs from some given starting point and process
files that it finds th
Thanks David. Those are excellent short clear examples. I will look those over.
Super! Thanks for that.
-kp
On Mar 27, 2010, at 5:30 PM, David Abbott wrote:
> On Sat, 2010-03-27 at 16:55 +0900, kevin parks wrote:
>
> Here is an example using subprocess.call
> http://dwabbott.com
I tried readings some toots and tried reading alan's thing. I just still can't
grok how to use subprocess.
I am trying to call sox (fun fact: an early contributer to sox was none other
than Guido van Rossum)
In the old days you would just use os i guess, like:
import os
os.system('sox -V3 -D -
Dang!
I wish you were not going. But really, I have to say a HUGE thank you
to you for all the fine teaching you have done on this list. I learned
so much from reading your posts. Thanks for all the time and effort
(and code) you put into this! I wish you were staying. Hats off to
you. Wi
hi
I am new territory here and not even sure where to start poking around
other than the os module some.
Essentially i need to do something like a shell script for batch
processing gobs of files. I am trying to use a command line tool (sox,
an open source sound file converter that runs fr
On Oct 12, 2009, at 8:02 PM, Dave Angel wrote:
Often, when a combination of existing stdlib collection types gets
too confusing, it's time to consider classes and objects. Not
necessarily to make the program "object oriented," but to make the
program data structure understandable.
That
> You might be interested in Steven Wolfram's book, "A New Kind of
> Science" and the many examples on his web site:
> http://www.wolframscience.com/ See Wikipedia as well. This is a very
> rich area.
Thanks. That was just the kind of reference I was looking for.
Fantastic.
I am sure i wont
I posted about this a couple weeks back, but then got horribly ill and
dropped the ball so i was hoping to revisit.
I am not sure if this is and example of Finite Automaton or a Finite
State Machine or perhaps it is related to a transition table or markov
process. I think some one here told
On Sep 26, 2009, at 11:42 PM, Alan Gauld wrote:
"Kent Johnson" wrote
It appears to be
http://openbookproject.net/thinkCSpy/ch04.html
So it is, Thats a shame CSpy is one of my favourite "competitors" :-)
Pity it's apparently encouraging the use of eval like this with no
caveat.
But to
On Sep 21, 2009, at 9:52 AM, Kent Johnson wrote:
Calling a generator function gives you something that can be iterated.
You can create a list out of it (by passing it to the list() function)
or you can iterate the items in it directly with a for loop. Using the
example above, you could say
fo
On Sep 21, 2009, at 1:32 AM, Alan Gauld wrote:
kevin parks wrote:
called, and what it is an example of. I guess there are generators
and iterators now and it seems this might be an example of one of
those new
This is a generator expression.
That's unfortunate news for me.
It is
I am afraid that in the long layoff in python has meant some new
constructs have passed me by. In googling around I found some nice
little code I want to use, but i don't quite understand it, how it is
called, and what it is an example of. I guess there are generators and
iterators now and
Are any of these methods better than another for some reason?
On Sep 9, 2009, at 10:12 PM, Lie Ryan wrote:
kevin parks wrote:
This discussion is making my brain melt.
It is also showing how clever Bob was to do it the way he did... I
found a solution that i think works, and think has not
Prolly good to post final solutions for future goog'lerz (like when i
forget) or anyone who was following along.
Here's where i ended up with this... shows both ways.
--
#!/usr/bin/env python
my_map = { 38:34, 40:39, 45:44, 47:46, 52:51, 59:58, 55:56 }
def filter_item(item):
retu
This discussion is making my brain melt.
It is also showing how clever Bob was to do it the way he did... I
found a solution that i think works, and think has not yet been
suggested. I quarantined Bob's code into a black box ... and then cast
the output as a plain old fashioned python built
I guess what i honestly want to asks, but am hesitant to since it
makes me look like a dork is:
What would this look like if i want to use a straight up built-in
dictionary type and not the collections.defaultdict.
import collections
def foo():
lookup = collections.defaultdict(l
or educational purposes. I am
somewhat nervous about using something other than
a built in type as i am not familiar with collections and it isn't
well covered in beginner books or the docs.
On Sep 9, 2009, at 12:44 AM, Kent Johnson wrote:
On Tue, Sep 8, 2009 at 10:07 AM, kevin parks
d
it in all the wrong places.
0 ['x']
1 ['x']
2 ['x']
3 ['x']
4 ['x']
5 ['y', 'x']
6 ['y', 'x']
7 ['y', 'x']
8 ['y', 'x', 'z']
9 ['y',
I am looking at this and wondering:
Why does this use collections.defaultdict ?
In fact i guess since collections.defaultdict is new to me i am not
even sure why it exists
and why someone would use this as opposed to using Python's built-in
dictionary? and why was it
used in this instance
I actually find the map biz easier to get my head around than the list
comp. I guess this makes it another good reason for me to be happy
that map is apparently staying in after nearly being depreciated. I
generally prefer list comp in every instance, but the idea of an if
else construct wi
ore than one way of doing something).
You mean people actually like ruby's syntax? I think Python's the
prettiest language I've worked with syntactically.
I wouldn't call having multiple ways to do something "flexible". I
agree more with Python's philosophy,
Yeah the list seems flaky at the moment. Additionally, my query is an
incredibly stupid one. But what you have works and represents an
improvement over the unreadable kludge I was doing. Thanks to all who
responded.
cheers,
k
On Sep 6, 2009, at 12:26 AM, Douglas Philips wrote:
On or ab
list just
now.
On Sep 5, 2009, at 11:47 PM, Wayne wrote:
On Fri, Sep 4, 2009 at 12:31 PM, kevin parks wrote:
I am doing some data massage, minor mapping and filtering really and
i find that i have a lot of this kind of kludgy code:
To do some basic jiggering of some out of range off gri
1. go to the book store
2. pull a copy of learning ruby by Michael Fitzgerald (ora.com)
3. pull a copy of learning python by Mark Lutz (ora.com)
4. read chapter 1 of each
5. make a decision
6. get to work
Alternately check comp.lang.python where this question comes up over
and over and over a
I am doing some simple things with sets and so far have had a lot of
success with python's built-in sets, which is such a great new(ish)
"batteries included" type python data type.
[snip] [snip] -- [snip] [snip]
--
#!/usr/bin/env python
def test(
I am doing some data massage, minor mapping and filtering really and i
find that i have a lot of this kind of kludgy code:
# -- -
def filt_seq(inseq):
out_list = []
for item in inseq:
# 38 needs to be mapped on to 34 as we don't have a 38
On Aug 29, 2009, at 12:23 AM, Michael M Mason wrote:
i wrote:
def pack(in_seq):
out_list=[]
x = 1
ll=[1, 1]
for each in in_seq:
ll[0] = x
ll[1] = each
out_list.append(ll)
#print ll
x
Interestingly changing:
out_list.append(ll)
to
out_list.append(list(ll))
seems to work. The part of my brain that understood why that is must
have sleeping.
-k
On Aug 28, 2009, at 11:05 PM, i wrote:
Back to python after a long long layoff. So i am running
I think this is b/c I am running 2.5. I also have 2.6 but i am using
2.5 for gnupoly and an older audio lib i have.
I ran the listcom below on 2.6 and it worked, so i just have to figure
out how that can be written for 2.5. I guess
2.6 has an update to enumerate.
-k
On Aug 29, 2009, at 2:2
Thanks for the replies. Though the list comprehension does not work:
TypeError: enumerate() takes exactly 1 argument (2 given)
On Aug 29, 2009, at 12:20 AM, vince spicer wrote:
#print foohough I didn't test your code, I think what you are
trying to accomplish can be done using enu
Back to python after a long long layoff. So i am running into some
beginner's confusion...
I am trying to plot a list of numbers in gnuplot.py. To do that I am
trying to pack the list with an index by iterating over the list so i
can get something like:
foo = [12, 11, 9, 6, 2, 9, 3, 8, 12
With sincere apologies for such a basic question, and one i will
admit that i asked once before, moons ago. But even after googling
around a bit i don't understand what the right answer is, or if i
once did, can't recall it now..
I have a script, let's call it foo.py
This script loads sever
I have been handed a huge number of documents which have hundreds of
pages of times and durations, all calculated and notated by several
different people over the course of many years. Sadly, no made any
guidelines at all about how this work would proceed and all the
documenters had their o
Ed,
I should have realized that the nesting would create the problem, but i
didn't have
that in mind... i always thought that the difference between extend and
append
was that extend did not yield a nested list.
I really need to revisit this issue and get it right in my mind. It is
a 'gotcha'
John,
Thanks. Your message was very helpful. I will tattoo it to my forehead.
hehe... i notice that the "learning python" book also explains so of
this
and i shall study that as well
cheers,
kevin
On Apr 27, 2006, at 10:14 PM, [EMAIL PROTECTED] wrote:
>
> On 28/04/06, kev
kevin--
On Apr 27, 2006, at 6:00 AM, [EMAIL PROTECTED] wrote:
> kevin parks wrote:
>> it seems to me that i need something like itertools cycle, except that
>> i need to keep track of when i have exhausted my list and then call
>> random.shuffle() on my sequence.
>
I know there is an answer to this somewhere. it is prolly the biggest
stumbling
block to all python n00bs, but it hasn't been an issue for me in a
while.
Suddenly i am getting bit by it and can't for the life of me keep
straight the
two way of opperating on lists.
In most case you are fine
I am trying to write a loop that iterates over a sequence and do
something x number of times. But sometimes i will need more events
(larger number x) than i have have items in the sequence, so if i need
more events that i have stuff in my sequence i would like to have the
loop reload and shuffl
I am trying to write a loop that iterates over a sequence and do
something x number of times. But sometimes i will need more events
(larger number x) than i have have items in the sequence, so if i need
more events that i have stuff in my sequence i would like to have the
loop reload and shuffl
Bob ... i used my kludge which defines some bounds and tests for
it... but your
idea of stuffing that into a seperate black box as golden in that it
made me think
of the problem as input --> doit --> result.
and made my loops simpler and easier to read... and i use that same
gap making
typing
I have a loop that process each item in a sequence and after each item
some updating is done to some variables. However i don't what these
variable updated if we are processing the last item in the list. i
could put in a conditional and test if the list is now empty after
popping items from the
e: text/plain; charset=ISO-8859-1; format=flowed
>
> kevin parks wrote:
>> I have a set that i iterate over... but each time through it i would
>> like to alternate between the original set and a variation of the set
>> that has one of the members of the set altered (
I have a set that i iterate over... but each time through it i would
like to alternate between the original set and a variation of the set
that has one of the members of the set altered (by + or - 1)
So if my original set is:
[0, 2, 4, 5, 7, 9, 11]
I would use that the first pass but on the se
Thanks to Kent Johnson, & David Heiser and everyone else. Looks like i
was most of the way there...hehe... David Heiser gets special bonus
points for actually understanding my initial mysterious query.
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hi,
Seems my post added much confusion. Sorry... I was hoping not to have
to post my code since it is really wrong and slightly embarrassing..
what i am trying to do is map an input range of values to output range.
I was hoping to make it a bit of an all purpose utility that would map
pretty m
i have various functions (that i didn't write) that put out data in
lists of various types. But some functions (which i didn't write) that
expect the data to be scaled, sometimes 0-1 sometimes 1-2, sometimes
0-127..., sometimes 0 - 32768... gosh you name it. In other words i
have a bunch of bla
> Yes, you need to unpack the result of calling windex(). You so ably
> demonstrated unpacking the list in your for loop I thought you would
> figure it out :-)
>
> Try
>lst_name, lst = windex(x)
>
> then random.choice() and print.
>
Thanks Kent i got it, just another brain-fart on my side...
D]>
> Content-Type: text/plain; charset=ISO-8859-1; format=flowed
>
> kevin parks wrote:
>> I have several lists... and i would like to some times chose from one
>> list and for a while choose from a different list, etc.
>
> You don't say what isn't workin
I noticed a couple days ago that the active state archive seems to have
ceased.
Is it going away?
cheers,
kevin
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I have several lists... and i would like to some times chose from one
list and for a while choose from a different list, etc... so i cooked
this up and it almost works so that i can get colors 50% of the time,
doggies 25%, beer 10%, and guitars 100% (if i was real smart i would
make my index th
On Mar 8, 2006, at 7:09 PM, Bob Gailer wrote:
> kevin parks wrote:
>> i have a module called foo.py
>>
>> foo.py imports random
>>
>> kp.py imports foo.py ... but in kp.py i also need to use stuff from
>> random...
>>
>> so kp.py also impo
i have a module called foo.py
foo.py imports random
kp.py imports foo.py ... but in kp.py i also need to use stuff from
random...
so kp.py also imports random
but i prolly shouldn't do that right?
Cause now, haven't i needlessly copied the same
names/attributes/methods/functions to 2 nam
John,
Thanks... i am liking this variation a tad more since it means i only
have to type the path in one place but it is akin to your second
one... i was (still am really) having a hard time understanding
how to apply path.join _and_ listdir sometimes list comprehensions
twist my brain b
howdy,
I am using the os module to do some of my heavy lifting for me. I am
tried of building lists
by hand so i decided that i would get python to look in a bunch of
directories and stuff all the things it
find there into a list depending on it's extension.
Works great ... one problem sometime
I am a little bit stuck
I want to play a bunch of soundfiles randomly, but i want to give each
soundfile a rating (say 0-100) and have the likelihood that the file be
chosen be tied to its rating so that the higher the rating the more
likely a file is to be chosen. Then i need some addit
hi all.
I am working with a list and would like to choose from the list
randomly but not uniformly. I am interested in several distributions
but the first one i looked at is Gaussian.
which you call like so:
random.gauss(mean, dev)
You can try this code courtesy of effbot (http://effbot.org
Danny (hope you are good!) & co,
I see that biz about random.seed()... but in the absence of setting
that ... does it
just grab a value from the system clock?
Is there a way to just let it generate it's usual, known seed... but
then observe
what that is in case you get an especially good run of
hi.
I am having some fun with python and making multiple runs on an
algorhythm and sometimes getting some fun stuff that i would like to be
able to reproduce, but there are some random elements in it. I wonder
is there a way to see the random seed, and make note of it so that you
could then se
Hi folks,
I am trying to cyclically rotate a seq until it reached the beginning
stage again.
I would like to be able to rotate in both directions and using any
arbitrary interval.
I think that I have this correct, but would be happy for someone to
check it and also
i am interested in any improve
Tremendously helpful One question though. How can i pluck a unique
item from my exhaustive list of permutations without repeats making
sure that each one is used once? Like filling a bag, shaking it, and
then picking from the bag and removing that item from the bag so it
isn't used again...
Greetings,
I am working on a program to produce patterns. What would like is for
it to exhaustively produce all possible permutations of a sequence of
items but for each permutation produce variations, and also a sort of
stutter based on probability / weighted randomess.
Let us say we have til
when i print:
print '\n','siday_q', key, '.wav'# event
i get:
siday_q 515 .wav
how can you eliminate the spaces to get:
siday_q515.wav
?
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thanks everyone... I will look at all the various appraoches folks came
up with and see what i can learnn from them. I ended doing something
lame -- a brute force method. I formmatted and reformatted my input
data and stuffed it in a HUGE dictionary it was stupid and
kludgy i hope to st
I also notice that there is the is the 'datetime' module, which is new
to version 2.3, which i now have access to. My feeling is that this
will do much of what i want, but i can't get my head round the standard
library reference stuff
http://www.python.org/doc/lib/module-datetime.html
I don't h
I am still working on it and also fixing the input data. I think for
simplicity and consistency's sake i will have *all* time values input
and output as hh:mm:ss maybe that would be easier for now.. so i am
editing the input stuff now...
so it should all look like:
Item_1, DAT_1, 1, 00:00:23, 0
Thanks for this Everyone!
Trying to work with all the stuff folks are giving me on this i a have
come across a problem... down
the line i notice that some of the times will also have an hour as well
as in H:M:S (e.g. 1:22:40)
so in some cases i would need to convert H:M:S to sec and some just M:
I am kind of in a bit of a jam (okay a big jam) and i was hoping that
someone here could give me a quick hand. I had a few pages of time
calculations to do. So, i just started in on them typing them in my
time calculator and writing them in by hand. Now i realize, that i
really need a script t
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