from:"ron"

Ok, I have three diverse answers from three of the tutors that I respect
most. 
 
Kent Johnson's approach: subclass dict and overloads the __getitem__ ,
__setitem__, and __delitem__ methods.
 
Alan G's idea:
 ". . .
Get the init method to update a global (or class based) 
list of instances and write a del() method that removes 
itself.
 
Then a class method can iterate that instance list 
doing whatever it needs to do..."

And Danny Yoo's hierarchical structure:

". . .
The idea here is that we impose some structure among the points.  We
can
keep a central Point that has a set of child points within its
satellite.

##
>>> centralPoint = Point(40, -81, {})
>>> satellitePoint = Point(40, -81, {}, centralPoint)
##

. . ."

Very clever ideas, as far as I can tell. I need to play with all three
of them so that I understand them thoroughly.  I think that once I do,
I'll be able to say I really understand OOP in Python! I believe that
any one of these approaches will do what I need, though, so maybe it
comes down to style.

Maybe I should explain why I thought I wanted this object. I am trying
to read, edit, and write shapefiles (actually, a shapefile is a
collection of 3-6 files having the same filename, but different
extensions. It's a legacy format that still gets a lot of use in
geography.)

One of the constituent files in a shapefile is a variant of Xbase,
which knows nothing  about NULL, so I have to provide some value in
every column for every record when I write them. I thought that having a
data structure that enforces a common set of "fields", the application
would be more robust when it's being edited. (Prevent me from deleting
an item for one record and not others, or adding a field to a record
without adding at least some default value to all the others.)

I just thought about it, but a CSV file has kind of the same problem.

Thanks, everyone; this will be a real education, however I go!

Ron
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[Tutor] Prevent "Coder's Remorse"?

 Kent Johnson wrote:
I'm curious about why you want to do this, it is kind of a
strange requirement. 

Yeah, that was bothering me, too. I was a little unsure if I'd even
defined the problem properly; that's what I meant by: "Am I even asking
the right questions?" 

I'll play around with the class a little and see if it helps me clarify
to myself what I am trying to do. I was kind of on the right path, but
I've never written much with __getitem__, __setitem__, etc. and it
wasn't going at all like I had in mind. I've found that when I patch and
patch and patch my code, it's usually because I am trying to do the
wrong thing altogether. And I wasn't using Class attributes properly,
either.

Thanks so much! Sorry for the vague question, but I really think the
class you made is close to what I needed.

Ron

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[Tutor] Prevent "Coder's Remorse"?

Maybe it's just me. I am always haunted by "coder's remorse" (the
certainty that there's a more compact, beautiful, fun, maintainable way
to code anything I finish.)
 
At any rate, I am currently working on a script to model an ordered
collection of geographic points, all of which must share the same
collection of attributes. So, a little collection might be:
 
pointList = [
{lat:40.123,lon:-81.456, 
'attributes':{'msg':'example','beavers':34, 'distance':18.132}
},
{lat:40.12345,lon:-81.45678, 
'attributes':{'msg':'','beavers':0, 'distance':0.0}
}
]
 
If I add an attribute of 'newAtt':'newVal' to
pointList[1]['attributes'], I want it to automatically add
'newAtt':'default' to
all the other member's 'attributes' dictionary. If I delete an
attribute, it should delete from all the member's dictionaries. The
attributes are limited to string, integer, and float values.
 
I can do this by brute force, but:

Is there an elegant approach that occurs to anyone? 
Is there a data structure that forces all members to have the same
keys? 
Is there an object structure that will let updates to one instance
affect all instances?
Am I even asking the right questions?

I suspect there's an elegant solution, but it's beyond me right now. If
not, fine; I'll happily go on with my ham-fisted approach.

Regards,




 
 

Ron Phillips
Programmer/Analyst
County of Summit Engineer
538 E. South St.
Akron, OH 44311
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Re: [Tutor] [tutor]web development



Well, I won't argue with anyone who chooses otherwise, but CherryPy http://www.cherrypy.org/ is easy to use, lightweight, quick, and pythonic. I write everything as plain old python, then webify it the very last thing. 
 
It's also the basis of a new, promising framework called TurboGears http://www.turbogears.org/, which Kevin Dangoor put together. He does a "Wiki in 20 minutes" tutorial that's pretty impressive.
 
 
 
Ron PhillipsProgrammer/AnalystCounty of Summit Engineer538 E. South St.Akron, OH 44311
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[Tutor] Stuck: unicode in regular expressions

2005-08-09 Thread Ron Phillips



I am expecting users to cut-and-paste DMS data into an application  like:  +40 30 15   E40 15 34.56, -81 0 0,   81 57 34.27E, W 40° 13 27.343, 40° 13 27.343 S, 140° 13 27.343S, S40° 13 27.34454,  81:57:34.27E 
 
I've been able to write a regex that seems to work in redemo.py, but it doesn't do at all what I want when I try to code it using the re module. The problem seems to be the way I am using unicode  specifically all those punctuation marks that might get pasted in. I anticipate the program getting its input from a browser; maybe that will narrow down the range somewhat. 
 
Anyway, given the string above, what regex will match the   and     characters, please? I have tried \x02BC and \x92 and \x2019 for the  , but no result. I am sure it's simple; I am sure some other newbie has asked it, but I have Googled my brains out, and can't find it.
 
Ron 
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[Tutor] Linux sound control

2005-07-21 Thread Ron Weidner

It's simple, without any bells and whistles. Move the
slider up and down to change the volume on your Linux
system. Written in Python and Tkinter, this little
program should work with any window manager.

http://www.techport80.com/soundctrl/sound_ctrl.tgz



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Re: [Tutor] Send attachment

2005-07-21 Thread Ron Weidner

--- Jorge Louis De Castro <[EMAIL PROTECTED]> wrote:

> Hello,
> 
> Any ideas how I can use Python and the Windows API
> to open a PC's mail client and send an attachment?
> The idea is saving some data onto a file and then
> invoke the email client (OE or Outlook or whatever
> is the default on the machine) with the recipient's
> address filled in and the file ready to be sent as
> an attachment. 
> Kinda like when we right-click on a file and select
> the "send to mail recipient" behavior.
> Been reading docs, trying out samples, and googling
> this for a few days to no avail.
> 
> Cheers

I'm not sure how to do that but, if you learn how to
use the smtp protocol, you won't need to use someones
mail client.  It's actually simple to use.  Try
looking at the problem from that angle and see if it
gets you anywhere.

Good luck

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Re: [Tutor] how to add python code to a webpage

2005-07-18 Thread Ron Phillips




Mustafa Abbasi asked:
 
i want to create a simple page which has a formand takes in persons date of birth and give out exact age.how do i add python codeto an html page.i don't have any dreamweaver or frontpage.this is basically cuz some freinds advised me to create this isnce i am learning programming python..so please help 
 
I find CherryPy is easy and lightweight to get started. http://www.cherrypy.org
 
Ron


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Re: [Tutor] Tk -- which label clicked

2005-07-14 Thread Ron Weidner

--- geon <[EMAIL PROTECTED]> wrote:

> Ron Weidner napsal(a):
> 
> >This doesn't work.  

> >def icon_click(self, event=None):
> >  print event.widget.option_get("text",
> event.widget)
> >
> >  
> >
> maybe event.widget['text'] ?

event.widget['text'] works.  Thanks.

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[Tutor] Tk -- which label clicked

2005-07-14 Thread Ron Weidner

This doesn't work.  Not an error though. :)  What I'm
trying to do is get the text value of a label.

def icon_click(self, event=None):
  print event.widget.option_get("text", event.widget)

Or, more to the point...  I need to dynamicaly create
clickable labels, each using the same callback.  When
clicked, I need to know which one was clicked.  I was
hoping to use the "text" of the label as the argument
to another function.

Any ideas, suggestions, or recommeded URLs to study?


Ronald Weidner
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PHP Software developer for hire.




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Re: [Tutor] Tkinter query?

2005-07-14 Thread Ron Weidner


> > tk = Tk()
> > tk.config(background='pink')
> > tk.geometry('400x400')
> >

# 320 = width
# 150 = height
#
# Left and down are relative to the screens uppeer
left
#
# 200 = position left (x)
# 200 = position down (y)

tk.geometry( "320x150+200+200")

hth


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[Tutor] tk entry focus

2005-07-13 Thread Ron Weidner

I've struggled... Now I'm asking...

What's wrong with this code?  Or more to the point,
how do you set the focus to an Entry widget?

Traceback (most recent call last):
  File "./run_dialogue.py", line 33, in ?
app = Run_dialogue( root )
  File "./run_dialogue.py", line 23, in __init__
self.cmd.focus()
AttributeError: 'NoneType' object has no attribute
'focus'


class Run_dialogue:
def __init__( self, master ):
img_path = path.dirname(sys.argv[0])
img_path = path.abspath(img_path)
#master.initial_focus.focus_set()
master.geometry( "300x150+200+200")
self.cmd_text = StringVar()
self.frame = Frame( master )
self.icon = PhotoImage( file=img_path +
"/target.gif" )
self.lbl_icon = Label( self.frame, image=self.icon )
self.lbl_icon.grid( row = 1, column = 0 )
self.label = Label( self.frame, text="Command: "
).grid( row = 1, column = 1 )
self.cmd   = Entry( self.frame,
textvariable=self.cmd_text ).grid( row = 1, column = 2
)
self.btn   = Button( self.frame, text=" Run ",
command=self.btn_run_click )
self.btn.grid( row = 2, column = 0, columnspan = 3,
sticky = "e")
self.btn.bind("", self.btn_run_click) 
self.frame.pack()
self.cmd.focus()

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Re: [Tutor] CGIXMLRPCRequestHandler doesn't actually work, does it?



Yes, I believe you are right -- I posted a reply to the list indicating that I suspect IIS is at fault; not Python. Or perhaps I should say "my installation of IIS"; I have no confidence whatsoever in my abilities to administer IIS properly.
 
Thanks for looking at the documentation -- I was stuck using 2.3 because of some other modules I needed, so I didn't look at the 2.4 docs. That would have made me less angry, but the script still wouldn't have run, because the problem (evidently) is in IIS, not my code. 
 
I was really hard up against it -- no response at all from IIS, just a lockup, and apparently when IIS locked up, it did so prior to writing to the error log. When I tried using the CGIHTTPServer, everything I did over the past 3 days worked without a hitch. What a relief!!
 
Now I just need to work around IIS -- and we don't use it outside the firewall, anyway. I think I'll put Apache on my local machine and use that.
 
Thanks, again
 
Ron
 
>>> Danny Yoo <[EMAIL PROTECTED]> 6/24/2005 2:44:44 PM >>>
> The example code in the python online documentation calls a non-existant> "div" function, so it was obviously a typing exercise, not actual code> that anyone ever tested.Hi Ron,Ah, ok, I see.  Check the bottom of:    http://www.python.org/doc/lib/simple-xmlrpc-servers.htmlfor a working example of that div function in the MyFuncs class.I believe that the example you were looking at earlier, near the bottomof:    http://www.python.org/doc/lib/node556.htmlhas is a documentation bug: the intent is clearly to compare and contrastSimpleXMLRPCServer and CGIXMLRPCRequestHandler, so the code should beusing the same example.  The fact that it isn't is confusing, and shouldbe fixed.  I'll send a bug report now.  http://python.org/sf/1227181Try Kent's example again; XMLRPC stuff is itself not too bad.  Your twoassumptions:    1.  It's too easy to mention, and not worth talking about    2.  It's too hard in practice, and not worth talking aboutare too black-and-white: XMLRPC itself is not bad at all, but CGI stuffcan be maddeningly difficult at first, because it involves not only Pythonbut also integration with an external web server.What I think you're running into is the CGI part, the part that doesn'tdebug as easily, just because error output doesn't automatically send tothe browser --- that would be a security risk! --- but instead is shuttledoff to your web server's error log file.  So take a closer look at yourweb server's error logs; I wouldn't be surprised to see some Python errormessages there that should help to isolate the issue.Best of wishes to you!__This email has been scanned by the MessageLabs Email Security System.For more information please visit http://www.messagelabs.com/email __
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Re: [Tutor] CGIXMLRPCRequestHandler doesn't actually work, does it?

Kent wrote:
CGI requires a running HTTP server in front of it. The server receives the HTTP request, sees that it is a CGI request, starts a new process with the environment set according to the CGI protocol, and runs the CGI handler. Do you understand this relationship? (I mean that kindly, your response makes me suspect there is a fair amount of black magic in this for you.)
The snippet above just starts a simple CGI-capable HTTP server. It is useful for testing, not an essential part of the recipe. If you have other CGIs working you must have a working HTTP server already, such as Apache or IIS.
In your initial post you said "I have run other CGI scripts in the same directory." Were those CGIs written in Python? How did you run them?
Kent-
Well, I understand the words, and I can see that the HTTP server (IIS, in this case) hands off CGI stuff to a CGI handler -- but I think that IS a fair amount of black magic! So no, I really can't claim any deep understanding of the process.
What I ran before were simple little test scripts of the "HelloWorld.py" variety. I would put them in the cgi-bin directory and invoke them with the browser, or with the HTTPLib in the command line, and I would get something back.
When I invoke any script in the cgi-bin that has CGIXMLRPCRequestHandler in it through localhost or localhost:80, the program freezes right up. Nothing returned, nothing in the IIS error log, no reply at all. However, the little test scripts that you and Joe provided run just fine as long as I don't use IIS as the server. Maybe I should have posted "IIS and CGIXMLRPCRequestHandler doesn't work at all!!" Seriously, it looks like my IIS installation is at fault -- probably some setting I need to change.
I wonder if that's the reason for all those unanswered posts -- it's not a Python problem, per se? Odd, though, that IIS is perfectly happy to run a Python script unless it has CGIXMLRPCRequestHandler in it.
Ron
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Re: [Tutor] CGIXMLRPCRequestHandler doesn't actually work, does it?



##Run a simple CGI server by opening a command line to the parent dir of cgi-bin and runningpython -c "import CGIHTTPServer; CGIHTTPServer.test()"
 
## 
 
Oh, dear -- I responded before I read your post, Kent. It turns out it was option b), after all. But I had NO idea I would need to do anything like the little clip above. Anything else I run under CGI, I just send an HTTP request and it works. I read, and read, and read, but never read anything about starting a CGIHTTPServer -- I'll look it up right away, but I can't see how I missed that. Maybe by Googling "XMLRPC", which was what I really wanted to do.
 
Anyway, thank you -- if I can find them again, I'll respond to all those other posts with a link to yours in the archives.
 
Ron
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Re: [Tutor] CGIXMLRPCRequestHandler doesn't actually work, does it?

Thanks for your response, Shuying Wang -- I was afraid no one even read the post. Now I see I wasn't clear.
--
Shuying Wang: I'm not sure what you're trying to do. But I run cgi scripts and makexmlrpc requests with xmlrpclib with a connection withxmlrpclib.Server(server_uri), though I'm only doing this client side.I'm not running the server as cgi.
---I have a Python module that I am trying to expose via XMLRPC. I can get it running by assigning a port on the server using SimpleXMLRPCRequestHandler, but I would prefer to expose it through CGI if possible. This seems to be the stated purpose of the CGIXMLRPCRequestHandler, but I believe it is broken in some very serious way.
The example code in the python online documentation calls a non-existant "div" function, so it was obviously a typing exercise, not actual code that anyone ever tested.
In researching the module, I found several requests on various mailing lists for example code -- not a single one ever had a response. When I've seen this before, it has turned out that either: a) it is terribly difficult, or b)it is stupidly simple. Since this is a tutor list, and I have seen the members graciously answer some questions that seemed pretty simple, I thought I'd post it here.
Since the only response (yours -- thanks again for responding!) was about xmlrpclib on the client side, not CGIXMLRPCRequestHandler on the server side, I can now conclude that it is terribly difficult, and slink off to publish using SOAP.
Ron
On 6/23/05, Ron Phillips <[EMAIL PROTECTED]> wrote:> > I believe I've tried every setting known to man, in every script in every> little scrap of documentation available. XMLRPC requests using> SimpleXMLRPCRequestHandler -- no problem. But try to run them as a CGI> script, and I get system lock ups and that's all. No error codes; no> response whatsoever. > > I am using Python 2.3, Windows XP. I have run other CGI scripts in the same> directory, so I know that works. > > Has anyone used this successfully? Can you share demo server and client> scripts -- just an echo function or something? > > Ron
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[Tutor] CGIXMLRPCRequestHandler doesn't actually work, does it?

2005-06-22 Thread Ron Phillips



I believe I've tried every setting known to man, in every script in every little scrap of documentation available. XMLRPC requests using SimpleXMLRPCRequestHandler -- no problem. But try to run them as a CGI script, and I get system lock ups and that's all. No error codes; no response whatsoever. 
 
I am using Python 2.3, Windows XP. I have run other CGI scripts in the same directory, so I know that works.
 
Has anyone used this successfully? Can you share demo server and client scripts -- just an echo function or something?
 
Ron
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[Tutor] CPAN for python

2005-06-06 Thread Ron Nixon

Is there a site like Perl's CPAN for Python? I've seen
the stuff at ActiveState. Anything else?

Ron Nixon



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Re: [Tutor] Am I making this harder than it needs to be?

2005-05-26 Thread Ron Phillips



Ron Phillips wrote:>> short version: I  need a way to get max and min E and N out of >> [(E0,N0),(E1,N1)...(En,Nn)] without reordering the list>>> Kent Johnson [EMAIL PROTECTED]> 5/25/2005 10:19 AM >>>For Python < 2.4 you need another set of [ ] e.g. min([e for e,n in coordList])

I knew I was working too hard!! That's exactly what I needed -- for some reason, ESRI (big name in geographic work) uses Python 2.2.
 
Ron Phillips wrote:
>> long version:>>  >> I would like a list of geographic coordinates (Easting, Northing) to >> maintain a "bounding box" >> [(minEasting,minNorthing),(maxEasting,maxNorthing)] attribute.>>>>I did it like this:>>>>class geoCoordinateList(UserList):>>def __init__(self):>>UserList.__init__(self)>>self.boundingBox = geoBox(minEN=geoCoordinate(),>>maxEN=geoCoordinate())>>def append(self, geoCoord):>>self.extend([geoCoord])>>self.boundingBox.challenge(geoCoord)#bumps the max and min if >>necessary>>but I'd have to override almost all the UserList methods, unless there's >>a way to call boundingBox.challenge() on any change to the list.>If you don't need too much list functionality it might be easier to wrap a list and delegate the >things you need:>class geoCoordinateList(object):>def __init__(self):>self.list = list()>self.boundingBox = geoBox(minEN=geoCoordinate(),>maxEN=geoCoordinate())>def append(self, geoCoord):>self.list.append(geoCoord) # No need for extend() here...>self.boundingBox.challenge(geoCoord)#bumps the max and min if necessary>I think you will want at least __getitem__() and __len__() as well.>Kent
Yep, that was my problem; I had "too much list functionality" to delegate -- your way is much better for the purpose. I can expose that class without promising all the functionality of a list.
 
In most languages there are a half-dozen stupid, painful ways to do a job, and maybe one that's merely painful, but in Python there's a half-dozen "ok" ways to do a job, and at least one that's a real pleasure!
 
Thanks for the answers!
 
Ron


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Re: [Tutor] Am I making this harder than it needs to be?

2005-05-25 Thread Ron Phillips



Oh, thanks! That didn't exactly do the trick, because I had data like [(1, 22),(2,11)], but from your code I came up with: 
 
    def getBB(self):    Es=[]    Ns=[]    for i in range(len(self)):    Es.append((self[i].E))    Ns.append((self[i].N))    self.boundingBox=geoBox((min(Es),min(Ns)),(max(Es),max(Ns)))    return(self.boundingBox)
which works fine, and I think will be pretty fast.
 
Ron>>> Pujo Aji <[EMAIL PROTECTED]> 5/25/2005 9:47 AM >>>
try this code:    L = [(1,11),(2,22)]    print max(L)    print min(L)I don't know if that what you want.good luckpujoOn 5/25/05, Ron Phillips <[EMAIL PROTECTED]> wrote:>  > short version: I  need a way to get max and min E and N out of> [(E0,N0),(E1,N1)...(En,Nn)] without reordering the list >   > long version: >   > I would like a list of geographic coordinates (Easting, Northing) to> maintain a "bounding box"> [(minEasting,minNorthing),(maxEasting,maxNorthing)]> attribute. >   > I did it like this: >   > class geoCoordinateList(UserList):> def __init__(self):> UserList.__init__(self)> self.boundingBox = geoBox(minEN=geoCoordinate(),>   maxEN=geoCoordinate())>  > def append(self, geoCoord):> self.extend([geoCoord])> self.boundingBox.challenge(geoCoord)#bumps the max and min if> necessary>  > but I'd have to override almost all the UserList methods, unless there's a> way to call boundingBox.challenge() on any change to the list. >   > The other way I thought would be to make a getBB method, like: >   > def getBB(self):> new=geoBox()> for gC in self:> new.challenge(gC)#bumps the corners if needed > self.boundingBox=new> return(new)>  > but that seems like a lot of churning if nothing has changed. >   > I suspect there's some slick, readable way to do this, and when I see it> I'll say "Doh!" >   >   >   > ___> Tutor maillist  -  Tutor@python.org> http://mail.python.org/mailman/listinfo/tutor> > >__This email has been scanned by the MessageLabs Email Security System.For more information please visit http://www.messagelabs.com/email __
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[Tutor] Am I making this harder than it needs to be?

2005-05-25 Thread Ron Phillips



short version: I  need a way to get max and min E and N out of [(E0,N0),(E1,N1)...(En,Nn)] without reordering the list
 
long version:
 
I would like a list of geographic coordinates (Easting, Northing) to maintain a "bounding box" [(minEasting,minNorthing),(maxEasting,maxNorthing)] attribute.
 
I did it like this:
 
class geoCoordinateList(UserList):    def __init__(self):    UserList.__init__(self)    self.boundingBox = geoBox(minEN=geoCoordinate(),  maxEN=geoCoordinate())
    def append(self, geoCoord):    self.extend([geoCoord])    self.boundingBox.challenge(geoCoord)#bumps the max and min if necessary
but I'd have to override almost all the UserList methods, unless there's a way to call boundingBox.challenge() on any change to the list.
 
The other way I thought would be to make a getBB method, like:
 
    def getBB(self):    new=geoBox()    for gC in self:    new.challenge(gC)#bumps the corners if needed
    self.boundingBox=new    return(new)
but that seems like a lot of churning if nothing has changed. 
 
I suspect there's some slick, readable way to do this, and when I see it I'll say "Doh!"
 
 
 
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[Tutor] buttons, scrollbar, tkinter

2005-05-19 Thread Ron Alvarado

I was trying to put buttons in, but now I know why it wouldn't work. I'm
going to take a look at PMW.

Thanks.

Ron A

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[Tutor] buttons, scrollbar, tkinter

2005-05-18 Thread Ron Alvarado

Is there any way to change this to put in a column of buttons and it will
scroll like it does now. I've tried but when I put in the buttons the
scrollbar just grows with all the buttons and won't do anything.

from Tkinter import *
root = Tk()
scrollbar = Scrollbar(root)
scrollbar.pack(side=RIGHT, fill=Y)
listbox = Listbox(root, yscrollcommand=scrollbar.set)

for i in range(55):
listbox.insert(END, str(i))

listbox.pack(side=LEFT, fill=BOTH)
scrollbar.config(command=listbox.yview)

Ron A

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Re: [Tutor] Opinions about this GIS script

2005-05-17 Thread Ron Phillips



Thank you, Andrei, that's just what I was hoping for -- I wondered about some of those issues, but was a little unsure how to approach a solution. 
 
Ron
 
 
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[Tutor] Opinions about this GIS script

2005-05-16 Thread Ron Phillips



I made a script that opens GIS shapefiles and turns them into python objects. I posted it at http://www.geocities.com/tiltbike/GIS/py_shape_files.zip The only one that's mine, really, is the PyShape.py script; the others are there for support/testing.
 
It's my first real effort at 'shareable' python. Everything else I've done so far is either a quick-and-dirty for my own use, or a simple illustration for instructional purposes.
 
The script produces expected results, but if anyone is so inclined, I'd appreciate review/evaluation/critique of the 'pythonism' of the script. 
 
Ron Phillips
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Re: [Tutor] re.findall vs. re.search and re.match

2005-03-15 Thread Ron Nixon

Kent:

The code is below. Here's the error message. 

Traceback (most recent call last):
  File "C:/Python24/reformat.py", line 5, in
-toplevel-
name = x.group(1)
AttributeError: 'list' object has no attribute 'group'




import re
f = open('reformat.txt').read()
pat = re.compile(r"([^\r\n]+)\n([^\r\n]*)\n([^\r\n]*)
([^\r\n]*) ([^\r\n]*)")
x=re.findall(pat,f)
name = x.group(1)
address = x.group(2)
citystate = x.group(3)+x.group(4)
zipcd = x.group(5)
o= open('reformat1.txt','w')
o.write("%s,%s,%s,%s\n" % (name, address,
citystate,zipcd))
o.close()
print("%s,%s,%s,%s\n" % (name, address,
citystate,zipcd))
--- Kent Johnson <[EMAIL PROTECTED]> wrote:
> Ron Nixon wrote:
> > Thanks to all who replied to my post earlier on
> re's.
> > I'm still preplexed by why re.search and re.match
> > works in the code below, but not re.findall.
> > re.findall is suppose to return all
> non-voerlapping
> > occurances of the  pattern that matches in this
> > example, but it returns errors. Looking through
> the
> > docs and from what I can see it should work. Can
> > anyone provide advice.
> 
> Please show the code that uses re.findall() and the
> error you receive when you run it.
> 
> Kent
> 
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[Tutor] re.findall vs. re.search and re.match

2005-03-15 Thread Ron Nixon

Thanks to all who replied to my post earlier on re's.
I'm still preplexed by why re.search and re.match
works in the code below, but not re.findall.
re.findall is suppose to return all non-voerlapping
occurances of the  pattern that matches in this
example, but it returns errors. Looking through the
docs and from what I can see it should work. Can
anyone provide advice.

import re
f = open('reformat.txt').read()
pat = re.compile(r"([^\r\n]+)\n([^\r\n]*)\n([^\r\n]*)
([^\r\n]*) ([^\r\n]*)")
x=re.search(pat,f)
name = x.group(1)
address = x.group(2)
citystate = x.group(3)+x.group(4)
zipcd = x.group(5)
o= open('reformat1.txt','w')
o.write("%s,%s,%s,%s\n" % (name, address,
citystate,zipcd))
o.close()
print("%s,%s,%s,%s\n" % (name, address, citystate,zipcd))



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[Tutor] re help

2005-03-13 Thread Ron Nixon

The following program takes text data like this:
Jimi Hendrix
2100 South Ave
Seattle, WA 55408

and changes it to this 

Jimi Hendrix, 2100 South Ave,Seattle,WA,55488

and writes it to a file. The problem I'm running into
is that it only writes this first address to a file
and there are several others in the file. I believe it
has something to do with using re.search instead of
re.findall. But re.findall returns a error when I try
using it. Suggestions? Thanks in advance.
Here is the script:

import re
f = open('reformat.txt').read()
pat = re.compile(r"([^\r\n]+)\n([^\r\n]*)\n([^\r\n]*)
([^\r\n]*) ([^\r\n]*)")
x=re.search(pat,f)
name = x.group(1)
address = x.group(2)
citystate = x.group(3)+x.group(4)
zipcd = x.group(5)
o= open('reformat1.txt','w')
o.write("%s,%s,%s,%s\n" % (name, address,
citystate,zipcd))
o.close()
print("%s,%s,%s,%s\n" % (name, address, citystate,zipcd))



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[Tutor] Better Search and replace method

2005-03-02 Thread Ron Nixon


I'm trying to figure out a better solution to do 
multiple search and replaces in a text file without
having to type:
import re
s = open('filename')
re.sub('vaule1','value2',s)
re.sub('vaule3','value4',s)
etc

I've tried putting all the vaules in a list and doing
the replace, but came up short. Any suggestions?

Thanks in advance

Ron




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Re: [Tutor] RE help

Problem solved. Thanks


--- Kent Johnson <[EMAIL PROTECTED]> wrote:

> Try it with non-greedy matches. You are matching
> everything from the first  
> in one match. Also I think you want to escape the .
> before  (you want just paragraphs that end 
> in a period?)
> 
> pattern = re.compile(""" href="/(.*?)">(.*?)\.""", re.DOTALL)
> 
> Kent
> 
> Ron Nixon wrote:
> > Trying to scrape a newspaper site for articles
> using
> > this code whic ws done with help from the list:
> > 
> > import urllib, re
> > pattern = re.compile(""" > href="/(.*)">(.*).""", re.DOTALL)
> > page
> >
> =urllib.urlopen("http://www.startribune.com";).read()
>  
> > 
> > for headline, body in pattern.findall(page):
> > print body
> > 
> > It should grab articles from this:
> > 
> > Sid
> Hartman:
> > Franchise could be movedIf Reggie
> Fowler
> > and his business partners from New Jersey are
> approved
> > to buy the Vikings franchise from Red McCombs, it
> is
> > my opinion the franchise remains in danger of
> > eventually being relocated.
> > 
> > and give me this: Sid Hartman: Franchise could be
> > movedIf Reggie Fowler and his business
> > partners from New Jersey are approved to buy the
> > Vikings franchise from Red McCombs, it is my
> opinion
> > the franchise remains in danger of eventually
> being
> > relocated.
> > 
> > Instead it gives me this:Boxerjam. from
> > this :
> >
>
href="http://www.startribune.com/stories/1559/4773140.html";>Boxerjam.
> > 
> > 
> > I know the re works in other programs I've tried.
> Is
> > there something different about re's in Python?
> > 
> > 
> > 
> > 
> > 
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[Tutor] RE help

Trying to scrape a newspaper site for articles using
this code whic ws done with help from the list:

import urllib, re
pattern = re.compile("""(.*).""", re.DOTALL)
page
=urllib.urlopen("http://www.startribune.com";).read()  

for headline, body in pattern.findall(page):
print body

It should grab articles from this:

Sid Hartman:
Franchise could be movedIf Reggie Fowler
and his business partners from New Jersey are approved
to buy the Vikings franchise from Red McCombs, it is
my opinion the franchise remains in danger of
eventually being relocated.

and give me this: Sid Hartman: Franchise could be
movedIf Reggie Fowler and his business
partners from New Jersey are approved to buy the
Vikings franchise from Red McCombs, it is my opinion
the franchise remains in danger of eventually being
relocated.

Instead it gives me this:Boxerjam. from
this :
href="http://www.startribune.com/stories/1559/4773140.html";>Boxerjam.


I know the re works in other programs I've tried. Is
there something different about re's in Python?





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RE: [Tutor] count words

Thanks to everyone who replied to my post. All of your
suggestions seem to work. My thanks

Ron


--- Ryan Davis <[EMAIL PROTECTED]> wrote:

> You could use split() to split the contents of the
> file into a list of strings.
> 
> ###
> >>> x = 'asdf foo bar foo'
> >>> x.split()
> ['asdf', 'foo', 'bar', 'foo']
> ###
> 
> Here's one way to iterate over that to get the
> counts.  I'm sure there are dozens.
> ###
> >>> x = 'asdf foo bar foo'
> >>> counts = {}
> >>> for word in x.split():
> ...   counts[word] = x.count(word)
> ... 
> >>> counts
> {'foo': 2, 'bar': 1, 'asdf': 1}
> ###
> The dictionary takes care of duplicates.  If you are
> using a really big file, it might pay to eliminate
> duplicates from the list
> before running x.count(word)
> 
> Thanks,
> Ryan 
> 
> -Original Message-
> From: [EMAIL PROTECTED]
> [mailto:[EMAIL PROTECTED] On Behalf Of Ron
> Nixon
> Sent: Tuesday, February 15, 2005 11:22 AM
> To: tutor@python.org
> Subject: [Tutor] count words
> 
> 
> I know that you can do this to get a count of home
> many times a word appears in a file
> 
> 
> f = open('text.txt').read()
> print f.count('word')
> 
> Other than using a several print statments to look
> for
> seperate words like this, is there a way to do it so
> that I get a individual count of each word:
> 
> word1 xxx
> word2 xxx
> words xxx
> 
> etc.
> 
> 
> 
> 
>   
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[Tutor] count words


I know that you can do this to get a count of home
many times a word appears in a file


f = open('text.txt').read()
print f.count('word')

Other than using a several print statments to look for
seperate words like this, is there a way to do it so
that I get a individual count of each word:

word1 xxx
word2 xxx
words xxx

etc.





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Re: [Tutor] Negative IF conditions

2005-02-14 Thread Ron Phillips




And now for something only slightly different: education research shows 
that people process "positives" far more quickly and accurately than 
"negatives", so for readability I often code like:
 
if os.path.exists('filename')
    #no-operation
else
    #operation
 
YMMV, of course.
 
Ron
At 08:52 AM 2/11/2005, Mark Brown wrote:
Hi,I'm a newbie and was 
  wondering which of these IF conditions is better structure:if 
not os.path.exists('filename'): if os.path.exists('filename') == False: 

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[Tutor] Value Error solved. Another question

Ignore my first posting. Here's what I'm trying to do.
I want to extract headlines from a newspaper's website
using this code. It works, but I want to match the
second group in (.*) and print
that out.
Sugguestions


import urllib, re
pattern = re.compile("""(.*)""", re.DOTALL)
page =
urllib.urlopen("http://www.startribune.com";).read()   
for headline in pattern.findall(page):
print headline




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[Tutor] Value Error message

Trying to scrape some headlines off a newspaper with
this code:

import urllib, re
pattern = re.compile("""(.*)""", re.DOTALL)
page =
urllib.urlopen("http://www.startribune.com";).read()   
for (headline, code, description) in
pattern.findall(page):
print (headline, code, description)

I'm getting the error below and can't find anything in
the documentation. Suggestions




Traceback (most recent call last):
  File "C:/Python24/Stribwebscrape.py", line 13, in ?
for (headline, code, description) in
pattern.findall(page):
ValueError: need more than 2 values to unpack



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[Tutor] writing list to new file

How would I save a list to a new file

for example: 

If line.startswith('XXX'):
save list to new file

But I get errors saying only stings can be saved this
way. 




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[Tutor] error message