metadata

问题 How can I read the properties/metadata like Title, Author, Subject and Keywords stored on a PDF file using Python? 回答1: Try pdfminer: from pdfminer.pdfparser import PDFParser from pdfminer.pdfdocument import PDFDocument fp = open('diveintopython.pdf', 'rb') parser = PDFParser(fp) doc = PDFDocument(parser) print(doc.info) # The "Info" metadata Here's the output: >>> [{'CreationDate': 'D:20040520151901-0500', 'Creator': 'DocBook XSL Stylesheets V1.52.2', 'Keywords': 'Python, Dive Into Python,

问题 How can I read the properties/metadata like Title, Author, Subject and Keywords stored on a PDF file using Python? 回答1: Try pdfminer: from pdfminer.pdfparser import PDFParser from pdfminer.pdfdocument import PDFDocument fp = open('diveintopython.pdf', 'rb') parser = PDFParser(fp) doc = PDFDocument(parser) print(doc.info) # The "Info" metadata Here's the output: >>> [{'CreationDate': 'D:20040520151901-0500', 'Creator': 'DocBook XSL Stylesheets V1.52.2', 'Keywords': 'Python, Dive Into Python,

问题 I want to be able to ascertain the provenance of the figures I create using matplotlib, i.e. to know which version of my code and data created these figures. (See this essay for more on provenance.) I imagine the most straightforward approach would be to add the revision numbers of the code and data to the metadata of the saved figures, or as comments in a postscript file for example. Is there any easy way to do this in Matplotlib? The savefig function doesn't seem to be capable of this but

问题 I'm using the Advanced Drive Service to set the Sheets column metadata. The column ID is being set, and I can retrieve it, but the sheetId property is not getting set. function setShColumnMetadata() { var request,response,ss,sh; ss = SpreadsheetApp.getActiveSpreadsheet(); sh = ss.getSheetByName('Employees'); request = [ { createDeveloperMetadata:{ developerMetadata:{ metadataKey:"employeeSh_DeptIdCol", metadataValue:JSON.stringify({ writtenBy:Session.getEffectiveUser().getEmail(), createdAt

问题 Can anybody recommend a nice exif lib for tiff img that can be used with a Qt program? I would like to both read and write exif data. Please note that that I need a license that is compatible with a closed source program, so a lib that is using LGPL or a BSD style license would be really nice. My first plan was to use QExifImageHeader and QExifValue in Qt Extended, but then I noticed that Extended never got the LGPL licence and is on top of that it is discontinued.... The platform used is

问题 Can anybody recommend a nice exif lib for tiff img that can be used with a Qt program? I would like to both read and write exif data. Please note that that I need a license that is compatible with a closed source program, so a lib that is using LGPL or a BSD style license would be really nice. My first plan was to use QExifImageHeader and QExifValue in Qt Extended, but then I noticed that Extended never got the LGPL licence and is on top of that it is discontinued.... The platform used is

问题 Normally, I'd do a relatively complicated change of data type on column A like this: Create column B of the new data type Set B to contain the new values derived from A Drop A Rename B to A To guarantee the validity of my data model, I'd like to perform such restructuring within a single transaction. So far, I have not been able to do that, because, depending on the isolation level, either B is not considered to exist yet, or I'm not allowed to rename B ("update conflicts with concurrent

问题 I am struggling to display metadata while using WCF. I have looked all over the place. I'm not sure if it is a setting in my web.config file, or my actual service is not working properly. But I get the "Metadata publishing for this service is currently disabled." page when I debug. <?xml version="1.0"?> <configuration> <system.serviceModel> <bindings> <webHttpBinding> <binding name="myWebHttp"/> </webHttpBinding> </bindings> <behaviors> <serviceBehaviors> <behavior name="EDSCoastmap">

问题 I am struggling to display metadata while using WCF. I have looked all over the place. I'm not sure if it is a setting in my web.config file, or my actual service is not working properly. But I get the "Metadata publishing for this service is currently disabled." page when I debug. <?xml version="1.0"?> <configuration> <system.serviceModel> <bindings> <webHttpBinding> <binding name="myWebHttp"/> </webHttpBinding> </bindings> <behaviors> <serviceBehaviors> <behavior name="EDSCoastmap">

问题 I'm trying to add either some side data or metadata per frame using the FFMpeg encoding example Here's what I have tried so far: /* encode 1 second of video */ for (i = 0; i < 25; i++) { fflush(stdout); /* make sure the frame data is writable */ ret = av_frame_make_writable(frame); if (ret < 0) exit(1); /* prepare a dummy image */ /* Y */ for (y = 0; y < c->height; y++) { for (x = 0; x < c->width; x++) { frame->data[0][y * frame->linesize[0] + x] = x + y + i * 3; } } /* Cb and Cr */ for (y =