Path: csiph.com!usenet.pasdenom.info!news.albasani.net!newsfeed.freenet.ag!news2.euro.net!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 0.001 X-Spam-Evidence: '*H*': 1.00; '*S*': 0.00; 'binary': 0.07; 'error:': 0.07; 'string': 0.09; 'encode': 0.09; 'indexes': 0.09; 'newline': 0.09; 'objects,': 0.09; 'prefix': 0.09; 'strings.': 0.09; 'subject:module': 0.09; 'subject:question': 0.10; 'api': 0.11; 'python': 0.11; "'rb')": 0.16; 'binary,': 0.16; 'binary.': 0.16; 'from:addr:mrabarnett.plus.com': 0.16; 'from:addr:python': 0.16; 'from:name:mrab': 0.16; 'literals': 0.16; 'message- id:@mrabarnett.plus.com': 0.16; 'offsets': 0.16; 'received:84.93': 0.16; 'received:84.93.230': 0.16; 'set,': 0.16; 'typeerror:': 0.16; 'unicode.': 0.16; 'appropriate': 0.16; 'wrote:': 0.18; 'bit': 0.19; 'split': 0.19; 'import': 0.22; 'header:User-Agent:1': 0.23; 'case.': 0.24; 'unicode': 0.24; 'header:In-Reply-To:1': 0.27; "doesn't": 0.30; 'characters': 0.30; 'gives': 0.31; 'lines': 0.31; "skip:' 10": 0.31; 'usually': 0.31; 'thanks!': 0.32; 'another': 0.32; 'text': 0.33; 'except': 0.35; 'case,': 0.35; 'convert': 0.35; 'objects': 0.35; 'received:84': 0.35; 'but': 0.35; 'add': 0.35; 'there': 0.35; 'possible': 0.36; 'should': 0.36; 'example,': 0.37; 'skip:- 20': 0.37; 'christian': 0.38; 'thank': 0.38; 'to:addr:python-list': 0.38; 'pdf': 0.39; 'to:addr:python.org': 0.39; 'skip:p 20': 0.39; 'read': 0.60; 'most': 0.60; 'break': 0.61; 'skip:o 30': 0.61; 'first': 0.61; 'such': 0.63; 'header:Reply-To:1': 0.67; 'default': 0.69; 'reply- to:no real name:2**0': 0.71; 'therefore': 0.72; 'funny': 0.74; 'pdf.': 0.84; 'reply-to:addr:python.org': 0.84; 'rusi': 0.91; 'hand,': 0.93 X-CM-Score: 0.00 X-CNFS-Analysis: v=2.1 cv=RZapVTdv c=1 sm=1 tr=0 a=0nF1XD0wxitMEM03M9B4ZQ==:117 a=0nF1XD0wxitMEM03M9B4ZQ==:17 a=0Bzu9jTXAAAA:8 a=oyR3mlnJdzkA:10 a=ihvODaAuJD4A:10 a=OUOv7kDek9cA:10 a=8nJEP1OIZ-IA:10 a=EBOSESyhAAAA:8 a=8AHkEIZyAAAA:8 a=5_gfI98ybrwA:10 a=ayC55rCoAAAA:8 a=r9KjfefjOmqKuQZLOZ8A:9 a=wPNLvfGTeEIA:10 X-AUTH: mrabarnett:2500 Date: Tue, 25 Jun 2013 17:59:49 +0100 From: MRAB User-Agent: Mozilla/5.0 (Windows NT 5.1; rv:17.0) Gecko/20130509 Thunderbird/17.0.6 MIME-Version: 1.0 To: python-list@python.org Subject: Re: io module and pdf question References: <20130625161520.OWWUK.343277.root@hrndva-web23-z01> In-Reply-To: <20130625161520.OWWUK.343277.root@hrndva-web23-z01> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-BeenThere: python-list@python.org X-Mailman-Version: 2.1.15 Precedence: list Reply-To: python-list@python.org 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: 55 NNTP-Posting-Host: 2001:888:2000:d::a6 X-Trace: 1372179590 news.xs4all.nl 15943 [2001:888:2000:d::a6]:35528 X-Complaints-To: abuse@xs4all.nl Xref: csiph.com comp.lang.python:49174 On 25/06/2013 17:15, jyoung79@kc.rr.com wrote: > Thank you Rusi and Christian! > > So it sounds like I should read the pdf data in as binary: > > -------------------- > import os > > pdfPath = '~/Desktop/test.pdf' > > colorlistData = '' > > with open(os.path.expanduser(pdfPath), 'rb') as f: > for i in f: > if 'XYZ:colorList' in i: > colorlistData = i.split('XYZ:colorList')[1] > break > > print(colorlistData) > -------------------- > > This gives me the error: > TypeError: Type str doesn't support the buffer API > > I admit I know nothing about binary, except it's ones and zeroes. Is there a way to read it in as binary, convert it to ascii/unicode, and then somehow split it by newline characters so that I can pull the appropriate metadata lines out? For example, XYZ:colorList="DarkBlue,Yellow" > In Python 2, string literals like '' are by default bytestrings. If you want a Unicode string you need to add the prefix u, so u''. In Python 3, string literals like '' are by default Unicode. If you want a bytestring you need to add the prefix b, so b''. Python 2 was lax when mixing bytestrings with Unicode strings. Python 3, on the other hand, insists that you know the difference: is it text (Unicode) or binary data (bytestring)? > Thanks! > > Jay > > -- > >> Most of the PDF objects are therefore not encoded. It is, however, >> possible to include a PDF into another PDF and to encode it, but that's >> a rare case. Therefore the metadata can usually be read in text mode. >> However, to correctly find all objects, the xref-table indexes offsets >> into the PDF. It must be treated binary in any case, and that's the >> funny reason for the first 3 characters of the PDF - they must include >> characters with the 8th bit set, such that FTP applications treat it as >> binary. > >> Christian >