Re: [Tutor] Tutor Digest, Vol 26, Issue 56
Quoting [EMAIL PROTECTED]: > Send Tutor mailing list submissions to > tutor@python.org > > To subscribe or unsubscribe via the World Wide Web, visit > http://mail.python.org/mailman/listinfo/tutor > or, via email, send a message with subject or body 'help' to > [EMAIL PROTECTED] > > You can reach the person managing the list at > [EMAIL PROTECTED] > > When replying, please edit your Subject line so it is more specific > than "Re: Contents of Tutor digest..." > > > Today's Topics: > >1. Changing lists in place (Paul D. Kraus) >2. Re: Changing lists in place (Paul D. Eden) >3. Re: Changing lists in place (Bob Gailer) >4. Re: Meaning of %g ? (Terry Carroll) >5. Re: Changing lists in place (Kent Johnson) >6. Re: Tutor Digest, Vol 26, Issue 55 (Carroll, Barry) >7. Re: Changing lists in place (Paul D. Eden) >8. Re: functions in Python (Alan Gauld) >9. Raw Bits! (Control characters ahoy!) (doug shawhan) > > > -- > > Message: 1 > Date: Mon, 17 Apr 2006 14:02:37 -0400 > From: "Paul D. Kraus" <[EMAIL PROTECTED]> > Subject: [Tutor] Changing lists in place > To: tutor@python.org > Message-ID: > <[EMAIL PROTECTED]> > Content-Type: text/plain; charset="iso-8859-1" > > I have a list that I want to change in a for loop. It changes in the loop > but the changes are not persistant outside of the loop. > I thought lists were mutuable objects so I am a bit confused. > > Sample Code > #!/usr/bin/env python > """ Testing lists """ > > mylist = [ 'One', ' two', ' three ' ] > print mylist > for element in mylist: > element = element.strip() > print "<>" + element + "<>" > print mylist > > > Sample Output > ['One', ' two', ' three '] > <>One<> > <>two<> > <>three<> > ['One', ' two', ' three '] > -- next part -- > An HTML attachment was scrubbed... > URL: > http://mail.python.org/pipermail/tutor/attachments/20060417/b1d0ae57/attachment-0001.html > > -- > > Message: 2 > Date: Mon, 17 Apr 2006 11:11:44 -0700 > From: "Paul D. Eden" <[EMAIL PROTECTED]> > Subject: Re: [Tutor] Changing lists in place > To: [EMAIL PROTECTED] > Cc: tutor@python.org > Message-ID: <[EMAIL PROTECTED]> > Content-Type: text/plain; charset=ISO-8859-1; format=flowed > > Lists are mutable, you are right. > > But the code you gave does not change the list. It changes the variable > element which is separate from the list myList. > > If you want to change the list try something like this: > > mylist = [ 'One', ' two', ' three ' ] > print mylist > newlist = [] > for element in mylist: > element = element.strip() > newlist.append(element) > print "<>" + element + "<>" > print newlist > > OR > > mylist = [ 'One', ' two', ' three ' ] > print mylist > mylist = [element.strip() for element in mylist] > for element in mylist: > print "<>" + element + "<>" > print mylist > > Paul > > Paul D. Kraus wrote: > > I have a list that I want to change in a for loop. It changes in the > > loop but the changes are not persistant outside of the loop. > > I thought lists were mutuable objects so I am a bit confused. > > > > Sample Code > > #!/usr/bin/env python > > """ Testing lists """ > > > > mylist = [ 'One', ' two', ' three ' ] > > print mylist > > for element in mylist: > > element = element.strip() > > print "<>" + element + "<>" > > print mylist > > > > > > Sample Output > > ['One', ' two', ' three '] > > <>One<> > > <>two<> > > <>three<> > > ['One', ' two', ' three '] > > > > > > > > > > ___ > > Tutor maillist - Tutor@python.org > > http://mail.python.org/mailman/listinfo/tutor > > > -- > > Message: 3 > Date: Mon, 17 Apr 2006 11:17:18 -0700 > From: Bob Gailer <[EMAIL PROTECTED]> > Subject: Re: [Tutor] Changing lists in place > To: [EMAIL PROTECTED] > Cc: tutor@python.org > Message-ID: <[EMAIL PROTECTED]> > Content-Type: text/plain; charset=ISO-8859-1; format=flowed > > Paul D. Kraus wrote: > > I have a list that I want to change in a for loop. It changes in the > > loop but the changes are not persistant outside of the loop. > > I thought lists were mutuable objects > They are. > > so I am a bit confused. > > > > Sample Code > > #!/usr/bin/env python > > """ Testing lists """ > > > > mylist = [ 'One', ' two', ' three ' ] > > print mylist > > for element in mylist: > element is a variable to which the successive items in mylist are > assigned. element has no "magic" connection to the list. > > element = element.strip() > In order to change a list item you must do something like: > mylist[itemIndex] = element.strip() > > So you need both the item's value and its position in the list. That's > what enumer
Re: [Tutor] Tutor Digest, Vol 26, Issue 62
Quoting [EMAIL PROTECTED]:
> Send Tutor mailing list submissions to
> tutor@python.org
>
> To subscribe or unsubscribe via the World Wide Web, visit
> http://mail.python.org/mailman/listinfo/tutor
> or, via email, send a message with subject or body 'help' to
> [EMAIL PROTECTED]
>
> You can reach the person managing the list at
> [EMAIL PROTECTED]
>
> When replying, please edit your Subject line so it is more specific
> than "Re: Contents of Tutor digest..."
>
>
> Today's Topics:
>
>1. Help Entry !!! (Cesar Garcia)
>2. creating a tab delim file (Srinivas Iyyer)
>3. Re: Olle-Olla (Kent Johnson)
>4. Re: Tutorial on bitwise Python? (Alan Gauld)
>5. Re: creating a tab delim file (Karl Pfl?sterer)
>6. Version of a .pyc file (Don Taylor)
>7. unit testing raw_input() (Andre Roberge)
>8. Re: Version of a .pyc file (Terry Carroll)
>9. Re: unit testing raw_input() (Michael)
> 10. Re: unit testing raw_input() (Danny Yoo)
>
>
> --
>
> Message: 1
> Date: Tue, 18 Apr 2006 11:14:03 -0700 (PDT)
> From: Cesar Garcia <[EMAIL PROTECTED]>
> Subject: [Tutor] Help Entry !!!
> To: tutor@python.org
> Message-ID: <[EMAIL PROTECTED]>
> Content-Type: text/plain; charset="iso-8859-1"
>
> Hi !!!
> Friends, i nedd process Data Entry in python
> Example
>
> Entry = 20
> Result = 20*10
>
> This Result in Windows (Tkinter)
> How do you do Think !!!
>
> Regards
> Cesar
> Exmaple
> from Tkinter import *
> class MyDialog:
> def __init__(self, parent):
> top = self.top = Toplevel(parent)
> Label(top, text="Valor").pack()
> self.e = Entry(top)
> self.e.pack(padx=5)
> b = Button(top, text="OK", command=self.ok)
> b.pack(pady=5)
> def ok(self):
> print "value is", self.e.get()
> self.top.destroy()
> root = Tk()
> root.update()
> d = MyDialog(root)
> root.wait_window(d.top)
>
>
> -
> New Yahoo! Messenger with Voice. Call regular phones from your PC and save
> big.
> -- next part --
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>
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>
> --
>
> Message: 2
> Date: Tue, 18 Apr 2006 11:53:58 -0700 (PDT)
> From: Srinivas Iyyer <[EMAIL PROTECTED]>
> Subject: [Tutor] creating a tab delim file
> To: tutor@python.org
> Message-ID: <[EMAIL PROTECTED]>
> Content-Type: text/plain; charset=iso-8859-1
>
> Hi group,
> I asked similar questions in the past. I am unable to
> get to the crux of this problem so that I can solve on
> my own. apologies for my ignorance.
>
>
> The problem:
>
> I have 50 tab delim files. Each file has 500 rows and
> 50 columns.
>
> I have to read the first column of each file. Repeat
> the same for 50 files and write a tab delim text file
> containing 500 rows and 50 columns.
>
> code that works through half of the problem:
>
> import glob
>
> files = glob.glob('*.proc')
>
>
> for each in files:
> f = open(each,'r')
> da = f.read().split('\n')
> dat = da[:-1]
> for m in dat:
> mycol = m.split('\t')[0]
> ..
>
> >From here I am blanked out. Although I can extract the
> first column from each file:I have no idea how to
> store each list.
>
> thought 1. Create an empty string and join each by a
> tab.
> ##
>mycol = ''
>for m in dat:
> mycol = m.split('\t')[0]
> mstr = '\t'.join(mycol)
> how can i append the data from second file to that
> string.
>
>
> could tutors help me with this situation.
>
> Thanks
> srini
>
> __
> Do You Yahoo!?
> Tired of spam? Yahoo! Mail has the best spam protection around
> http://mail.yahoo.com
>
>
> --
>
> Message: 3
> Date: Tue, 18 Apr 2006 14:59:38 -0400
> From: Kent Johnson <[EMAIL PROTECTED]>
> Subject: Re: [Tutor] Olle-Olla
> To: Python Tutor
> Message-ID: <[EMAIL PROTECTED]>
> Content-Type: text/plain; charset=UTF-8; format=flowed
>
> Andre Engels wrote:
> > 2006/4/18, Kent Johnson <[EMAIL PROTECTED]>:
> >> J?nos Juh?sz wrote:
> >>> Hi All,
> >>>
> >>> Is it possible to replace the print statement with one of mine function ?
> >>>
> >>> In reality, I would like to replace the print in my PyCrust app with the
> >>> log.write() function.
> >> Best: Use a good editor to change your print statements to log.write()
> >
> > Even better: Use a good editor to change your print statements to
> > myprint() and then def myprint() to be log.write(). This has the
> > advantage that if (for example) you want prints later to be "usually
> > log.write() but if redFlagHighestWarning is True, then both
> > log.write() and print()", you don't need to go through all this again,
> > but just have to change myprint().
>
> Or use the logging module, w
