hi i am trying to install python3.1.5 tgz in windows 7 but not getting exe file for installing.can u help me for this
On 9/25/12, tutor-requ...@python.org <tutor-requ...@python.org> wrote: > 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 > tutor-requ...@python.org > > You can reach the person managing the list at > tutor-ow...@python.org > > When replying, please edit your Subject line so it is more specific > than "Re: Contents of Tutor digest..." > > > Today's Topics: > > 1. Usefulness of BIFs all() and any()? (Richard D. Moores) > 2. Re: Usefulness of BIFs all() and any()? (Hugo Arts) > 3. Re: Usefulness of BIFs all() and any()? (Dave Angel) > 4. Re: Usefulness of BIFs all() and any()? (Steven D'Aprano) > 5. Re: Unzipping a Zip of folders that have zips within them > that I'd like to unzip all at once. (Gregory Lund) > > > ---------------------------------------------------------------------- > > Message: 1 > Date: Tue, 25 Sep 2012 04:55:47 -0700 > From: "Richard D. Moores" <rdmoo...@gmail.com> > To: Tutor List <tutor@python.org> > Subject: [Tutor] Usefulness of BIFs all() and any()? > Message-ID: > <CALMxxxkhjHF0BEfLOox0zPbAiD=zs35s3navnhujdba+88e...@mail.gmail.com> > Content-Type: text/plain; charset="utf-8" > > I was just perusing the Built-in Functions of Python 3.2 (< > http://docs.python.org/py3k/library/functions.html>) and was wondering > where would one ever use any() or all(). > > all(iterable) > Return True if all elements of the iterable are true (or if the iterable is > empty). Equivalent to: > > def all(iterable): > for element in iterable: > if not element: > return False > return True > > any(iterable) > Return True if any element of the iterable is true. If the iterable is > empty, return False. Equivalent to: > > def any(iterable): > for element in iterable: > if element: > return True > return False > > Given a = [0, 1, 2, 3], > >>>> all(a) > False >>>> any(a) > True > > But so what? Could I get some better examples? > > And why >>>> all([]) > True >>>> any([]) > False > > Thanks, > > Dick Moores > -------------- next part -------------- > An HTML attachment was scrubbed... > URL: > <http://mail.python.org/pipermail/tutor/attachments/20120925/2f126a49/attachment-0001.html> > > ------------------------------ > > Message: 2 > Date: Tue, 25 Sep 2012 14:24:20 +0200 > From: Hugo Arts <hugo.yo...@gmail.com> > To: "Richard D. Moores" <rdmoo...@gmail.com> > Cc: Tutor List <tutor@python.org> > Subject: Re: [Tutor] Usefulness of BIFs all() and any()? > Message-ID: > <cajmbofmgbbw4mvyb7hpgeigm5yg-karjx86ql6zylqmkrfi...@mail.gmail.com> > Content-Type: text/plain; charset="utf-8" > > On Tue, Sep 25, 2012 at 1:55 PM, Richard D. Moores > <rdmoo...@gmail.com>wrote: > >> I was just perusing the Built-in Functions of Python 3.2 (< >> http://docs.python.org/py3k/library/functions.html>) and was wondering >> where would one ever use any() or all(). >> >> But so what? Could I get some better examples? >> > > I frequently use any() or all() in combination with a generator expression > to check for a certain condition over a list of elements. Let's say, for > example, I want to make sure all files I used are closed at the end of a > function (or perhaps a unit test?) > > assert all(f.closed for f in open_files) > > probably not the *most* useful example of that, but I'm sure you understand > the principle. It's useful when you need to check if all() or any() of an > iterator pass a certain condition. > > >> >> And why >> >>> all([]) >> True >> >>> any([]) >> False >> > > People often wonder over this one. any([]) should logically be False, > because it is like asking the question "is there any member in this > iterable that is True?" Obviously, there is not, since the iterator is > empty. all([]) is True by the principle of vacuous truth: > > http://en.wikipedia.org/wiki/Vacuous_truth > > The principle, though somewhat intuitive, has a strong mathematical basis. > > HTH, > Hugo > -------------- next part -------------- > An HTML attachment was scrubbed... > URL: > <http://mail.python.org/pipermail/tutor/attachments/20120925/0d4590e1/attachment-0001.html> > > ------------------------------ > > Message: 3 > Date: Tue, 25 Sep 2012 08:33:22 -0400 > From: Dave Angel <d...@davea.name> > To: "Richard D. Moores" <rdmoo...@gmail.com> > Cc: Tutor List <tutor@python.org> > Subject: Re: [Tutor] Usefulness of BIFs all() and any()? > Message-ID: <5061a492.2080...@davea.name> > Content-Type: text/plain; charset=ISO-8859-1 > > On 09/25/2012 07:55 AM, Richard D. Moores wrote: >> <snip> >> >> And why >>>>> all([]) >> True >>>>> any([]) >> False >> >> > > Same problem as calling sum() with an empty list. What value should it > have? Clearly, it should return its 'start' parameter, which defaults > to zero. > > Well the all() has a start value of True, and ands that with each > element of the iterable till one of them ends up with false. Similarly, > the any() has a start value of False. > > > > -- > > DaveA > > > > ------------------------------ > > Message: 4 > Date: Tue, 25 Sep 2012 23:41:53 +1000 > From: Steven D'Aprano <st...@pearwood.info> > To: tutor@python.org > Subject: Re: [Tutor] Usefulness of BIFs all() and any()? > Message-ID: <5061b4a1.4040...@pearwood.info> > Content-Type: text/plain; charset=UTF-8; format=flowed > > On 25/09/12 21:55, Richard D. Moores wrote: >> I was just perusing the Built-in Functions of Python 3.2 (< >> http://docs.python.org/py3k/library/functions.html>) and was wondering >> where would one ever use any() or all(). > > Both are very useful. They are especially useful for validating data, or > for interactive use. For instance, to check that a list of numbers are > all positive: > > if all(x > 0 for x in numbers): ... > > and then go on to process the numbers. > > There are over a dozen examples of any or all in the Python standard > library. (There would be more, but a lot of the std lib pre-dates the two > functions.) They tend to be used to check the state of some collection of > values, and return a flag. For example: > > return any(key in m for m in self.maps) > > checks whether a key appears in a collection of maps. Otherwise that one > line would be written as: > > for m in self.maps: > if key in m: > return True > return False > > > Notice the pattern there is that if the collection of maps is empty, then > you return False. And sure enough, any([]) returns False. > > In an example from my own code, I have a pool of threads doing work, and > loop until all of the threads have finished: > > while any(t.isAlive() for t in threads): ... > > > Another example, I check that a list of objects are all integers: > > if not all(isinstance(i, int) for i in key): ... > > > Basically, the functions all and any should be used whenever you need to > check that a condition holds for ALL the values, or for ANY value, in a > collection of values. If they sound like trivial functions, well, yes, > they are trivial like a hammer is trivial. It's just a lump of metal used > for bashing in nails. > > >> And why >>>>> all([]) >> True >>>>> any([]) >> False > > Because they match the most useful and common patterns for testing that > some condition holds. Normally we want to test: > > * there is at least one value where this condition holds (use any) > > rather than: > > * there are no values at all, or there is at least one value... > > Imagine the set of living people with no heads. If any of them are called > "Steve", you pay me a dollar. Do you owe me anything? > > The case for all([]) returning True is a bit less obvious. One of the first > things I did in my own code was write an alternative version of all: > > def all2(iterable): > magic = object() > element = magic > for element in iterable: > if not element: > return False > return element is not magic > > > but I've never used it. > > See also: > > http://en.wikipedia.org/wiki/Vacuous_truth > > > > > -- > Steven > > > ------------------------------ > > Message: 5 > Date: Tue, 25 Sep 2012 07:52:04 -0700 > From: Gregory Lund <gnj091...@gmail.com> > To: Peter Otten <__pete...@web.de>, Oscar Benjamin > <oscar.j.benja...@gmail.com> > Cc: tutor@python.org > Subject: Re: [Tutor] Unzipping a Zip of folders that have zips within > them that I'd like to unzip all at once. > Message-ID: > <CAK=ob9x3x-eplkyszg+uaszykpyxws9jkbjjsc2q8ud8vc_...@mail.gmail.com> > Content-Type: text/plain; charset=ISO-8859-1 > >> Why did you change file mode to "a"? > I was trying different things and forgot to change it back before I > cut/pasted. >> > > >> >> dest_path = os.path.dirname(fullpath) >> x.extractall(dest_path) >> > Ding ding ding, winner winner chicken dinner! > It's working! > Final .py stand alone code is: > > import os, os.path, zipfile, arcpy > > in_Zip = r'D:\D_Drive_Documents\Student_Work_Sample_usecopy1\2012-09-18 > Lab_2.zip' > > outDir = r"D:\D_Drive_Documents\Student_Work_Sample_usecopy1" > > z = zipfile.ZipFile(in_Zip,'r') > > z.extractall(outDir) > > zipContents = z.namelist() > z.close() > > for item in zipContents: > if item.endswith('.zip'): > # Combine the base folder name with the subpath to the zip file > fullpath = os.path.join(outDir, item) > x = zipfile.ZipFile(fullpath,'r') > dest_path = os.path.dirname(fullpath) > x.extractall(dest_path) > x.close() > > and... the final code that I'll use in my ArcGIS script/tool is: > (I kept the old code with absolute paths to help anyone who wanted to > use this on their zip of zips (with it commented out and my ArcGIS > requirements immediately below.) > > > import os, os.path, zipfile, arcpy > > #in_Zip = r'D:\D_Drive_Documents\Student_Work_Sample_usecopy1\2012-09-18 > Lab_2.zip' > in_Zip = arcpy.GetParameterAsText(0) > > #outDir = r"D:\D_Drive_Documents\Student_Work_Sample_usecopy1" > outDir = os.getcwd() > > z = zipfile.ZipFile(in_Zip,'r') > > z.extractall(outDir) > > zipContents = z.namelist() > z.close() > > for item in zipContents: > if item.endswith('.zip'): > # Combine the base folder name with the subpath to the zip file > fullpath = os.path.join(outDir, item) > x = zipfile.ZipFile(fullpath,'r') > dest_path = os.path.dirname(fullpath) > x.extractall(dest_path) > x.close() > > -------------------------------- > Words/pixels can not express how grateful I am to everyone that > pitched in and helped guide me through this seemingly simple task. > The code works & the Esri ArcGIS tool works! > > It's not really 'my' code or tool: > the credit goes to Peter, Oscar, Dave, Stephen and others for > their/your comments, debugging, code suggestions, and patience. > > I also appreciate the fact that someone didn't just give me the full > code, struggling through googling etc. helped me learn. > I'm still a rookie/neophyte, but a very happy one this morning! > Aug. 7 to now, thanks for all the help! > > Thanks again! > > Regards, > Greg Lund > > PS, but aren't you all going to miss my daily stupid questions? (ok, > maybe not!). > > > ------------------------------ > > Subject: Digest Footer > > _______________________________________________ > Tutor maillist - Tutor@python.org > http://mail.python.org/mailman/listinfo/tutor > > > ------------------------------ > > End of Tutor Digest, Vol 103, Issue 124 > *************************************** > -- afzal _______________________________________________ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
