Path: csiph.com!v102.xanadu-bbs.net!xanadu-bbs.net!feeder.erje.net!eu.feeder.erje.net!newsfeed.xs4all.nl!newsfeed1.news.xs4all.nl!xs4all!newsgate.cistron.nl!newsgate.news.xs4all.nl!post.news.xs4all.nl!not-for-mail Return-Path: X-Original-To: python-list@python.org Delivered-To: python-list@mail.python.org X-Spam-Status: OK 0.006 X-Spam-Evidence: '*H*': 0.99; '*S*': 0.00; 'parameters': 0.04; 'subject:text': 0.05; 'abuse': 0.07; 'attribute': 0.07; 'subject:file': 0.07; 'string': 0.09; 'collier': 0.09; 'exist,': 0.09; 'lines.': 0.09; 'newline': 0.09; 'says.': 0.09; 'sentence': 0.09; 'subject:skip:a 10': 0.09; 'assume': 0.14; '"with"': 0.16; 'doing,': 0.16; 'hint': 0.16; 'reason.': 0.16; 'sorting': 0.16; 'subject:Sort': 0.16; 'success:': 0.16; 'wrote:': 0.18; 'trying': 0.19; 'first.': 0.19; 'command': 0.22; '>>>': 0.22; 'code,': 0.22; 'email addr:gmail.com>': 0.22; 'header:User-Agent:1': 0.23; 'error': 0.23; '>>>': 0.24; "shouldn't": 0.24; 'file.': 0.24; 'sort': 0.25; 'second': 0.26; 'header:In-Reply-To:1': 0.27; 'tried': 0.27; "doesn't": 0.30; '8bit%:3': 0.30; 'received:10.0.0': 0.31; '"",': 0.31; 'file:': 0.31; 'object.': 0.31; 'parameters.': 0.31; 'file': 0.32; 'probably': 0.32; 'text': 0.33; 'open': 0.33; '(most': 0.33; 'guess': 0.33; 'plain': 0.33; 'problem': 0.35; 'advice': 0.35; 'skip:s 30': 0.35; 'something': 0.35; 'convert': 0.35; 'johnson': 0.35; 'but': 0.35; 'received:google.com': 0.35; 'accessing': 0.36; 'skip:s 60': 0.36; 'thanks': 0.36; 'received:10.0': 0.36; 'error.': 0.37; 'list': 0.37; 'received:10': 0.37; 'skip:& 10': 0.38; 'to:addr:python- list': 0.38; 'files': 0.38; 'pm,': 0.38; 'rather': 0.38; 'recent': 0.39; 'does': 0.39; 'bad': 0.39; 'sure': 0.39; 'to:addr:python.org': 0.39; '8bit%:6': 0.40; 'how': 0.40; 'blank': 0.60; 'is.': 0.60; 'then,': 0.60; 'august': 0.61; 'skip:o 30': 0.61; 'tips': 0.61; 'took': 0.61; 'matter': 0.61; "you're": 0.61; 'first': 0.61; 'close': 0.67; 'reverse': 0.68; 'useful.': 0.68; '#1:': 0.84; '#2:': 0.84; 'received:mail-ob0-x22d.google.com': 0.84; 'from.': 0.93; 'have.': 0.93; 'wanting': 0.93; '2013': 0.98 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=message-id:date:from:user-agent:mime-version:to:subject:references :in-reply-to:content-type; bh=iXPHvG9o6FBgONpyGEebqnVn/0uNAI1FKJuDrA+5ut8=; b=irETEeWEIjLrWzVzec1udAXX5KLi5hBv8jm0EVBHzYxXB7kV8+mtC661TtWmN+1+cp NBRVsJO5YC3Iya0Bp0dDKA+ndAs38vrhL3rE1xvGk8Sz9atJ3n01pQMWkoSL8fygjlaQ 84A+yqFM9t/6KHKJ5yhoI7RtJarl30m4Q4p1mfq+TcQ8ynVWJpkMvT74djtkVatukcz6 lsz0KS08flspjQYJRg98Szgir0nBWB1O3P60/BlMlb8cDUe0h3bkr2YLErT8ZxA3Y3Q/ nFGUmZpWigAZlAmUuWBbRCQiuEmeZVTvmEj2CfE/aymv1fcBQ2ucMY0tncYH+S8+D7p9 ozdw== X-Received: by 10.182.48.230 with SMTP id p6mr547492obn.1.1375785491942; Tue, 06 Aug 2013 03:38:11 -0700 (PDT) Date: Tue, 06 Aug 2013 06:38:08 -0400 From: Devyn Collier Johnson User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:17.0) Gecko/20130803 Thunderbird/17.0.8 MIME-Version: 1.0 To: Python Mailing List Subject: Re: Sort lines in a plain text file alphanumerically References: <520058D7.10105@Gmail.com> In-Reply-To: Content-Type: multipart/alternative; boundary="------------040607090605090806090309" X-BeenThere: python-list@python.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: General discussion list for the Python programming language List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Newsgroups: comp.lang.python Message-ID: Lines: 233 NNTP-Posting-Host: 2001:888:2000:d::a6 X-Trace: 1375785495 news.xs4all.nl 15984 [2001:888:2000:d::a6]:53125 X-Complaints-To: abuse@xs4all.nl Xref: csiph.com comp.lang.python:52024 This is a multi-part message in MIME format. --------------040607090605090806090309 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit On 08/05/2013 11:12 PM, Joshua Landau wrote: > On 6 August 2013 03:00, Devyn Collier Johnson > wrote: > > I am wanting to sort a plain text file alphanumerically by the > lines. I have tried this code, but I get an error. I assume this > command does not accept newline characters. > > > HINT #1: Don't assume that without a reason. It's wrong. > > >>> file = open('/home/collier/pytest/sort.TXT', 'r').read() > > > HINT #2: Don't lie. "file" is not a file so you probably shouldn't > call it one. It's the contents of a file object. > > >>> print(file) > z > c > w > r > h > s > d > > > >>> file.sort() #The first blank line above is from the file. I do > not know where the second comes from. > Traceback (most recent call last): > File "", line 1, in > AttributeError: 'str' object has no attribute 'sort' > > > HINT #3: *Read*. What does it say? > > AttributeError: 'str' object has no attribute 'sort' > > Probably your problem, then, is that a 'str' object has no attribute > 'sort'. That's what it says. > > "file" is a "'str' object". You are accessing the 'sort' attribute > which it doesn't have. > > I had the parameters (key=str.casefold, reverse=True), but I took > those out to make sure the error was not with my parameters. > > > HINT #4: Don't just guess what the problem is. The answer is in the error. > > Specifically, I need something that will sort the lines. They may > contain one word or one sentence with punctuation. I need to > reverse the sorting ('z' before 'a'). The case does not matter > ('a' = 'A'). > > I have also tried this without success: > > >>> file.sort(key=str.casefold, reverse=True) > Traceback (most recent call last): > File "", line 1, in > AttributeError: 'str' object has no attribute 'sort' > > > > > So you want to sort your string by lines. Rather than trying to abuse > a .sort attribute that patently doesn't exist, just use sorted OR > convert to a list first. > > sorted(open('/home/collier/pytest/sort.TXT'), key=str.casefold, > reverse=True) > > Because it's bad to open files without a with unless you know what > you're doing, use a with: > > with open('/home/collier/pytest/sort.TXT') as file: > sorted(file, key=str.casefold, reverse=True) Thanks for the advice Joshua. I find these tips very useful. However, how would I close the files, or would they close after the "with" construct is complete? Mahalo, DCJ --------------040607090605090806090309 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: 8bit
On 08/05/2013 11:12 PM, Joshua Landau wrote:
On 6 August 2013 03:00, Devyn Collier Johnson <devyncjohnson@gmail.com> wrote:
I am wanting to sort a plain text file alphanumerically by the lines. I have tried this code, but I get an error. I assume this command does not accept newline characters.

HINT #1: Don't assume that without a reason. It's wrong.
 
>>> file = open('/home/collier/pytest/sort.TXT', 'r').read()

HINT #2: Don't lie. "file" is not a file so you probably shouldn't call it one. It's the contents of a file object.
 
>>> print(file)
z
c
w
r
h
s
d


>>> file.sort() #The first blank line above is from the file. I do not know where the second comes from.
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
AttributeError: 'str' object has no attribute 'sort'

HINT #3: *Read*. What does it say? 

    AttributeError: 'str' object has no attribute 'sort'

Probably your problem, then, is that a 'str' object has no attribute 'sort'. That's what it says.

"file" is a "'str' object". You are accessing the 'sort' attribute which it doesn't have.

I had the parameters (key=str.casefold, reverse=True), but I took those out to make sure the error was not with my parameters.

HINT #4: Don't just guess what the problem is. The answer is in the error.
 
Specifically, I need something that will sort the lines. They may contain one word or one sentence with punctuation. I need to reverse the sorting ('z' before 'a'). The case does not matter ('a' = 'A').

I have also tried this without success:

>>> file.sort(key=str.casefold, reverse=True)
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
AttributeError: 'str' object has no attribute 'sort'



So you want to sort your string by lines. Rather than trying to abuse a .sort attribute that patently doesn't exist, just use sorted OR convert to a list first.

    sorted(open('/home/collier/pytest/sort.TXT'), key=str.casefold, reverse=True)

Because it's bad to open files without a with unless you know what you're doing, use a with:

    with open('/home/collier/pytest/sort.TXT') as file:
        sorted(file, key=str.casefold, reverse=True)

Thanks for the advice Joshua. I find these tips very useful. However, how would I close the files, or would they close after the "with" construct is complete?

Mahalo,

DCJ
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