使用正则表达式避免使用特殊字符

Question

I'm writing a Python script to extract metadata from a PDF user pyPdf.

The output is something like this:

{'/Subject': u'Presentation from the 2011 Water Program Peer Review',
 '/Producer': u'Mac OS X 10.7.2 Quartz PDFContext', 
 '/Creator': u'PowerPoint', 
 '/ModDate': u"D:20120109085812-07'00'", 
 '/Keywords': u'', 
 '/Title': u'Wind Wave Float', 
 '/CreationDate': 'D:20111030043455Z'}

I only need the title and subject fields, so the printed output would ideally be:

Wind Wave Float, Presentation from...

So I can easily input the data into a spreadsheet.

Can anyone help me with some regex? I can't seem to figure out how to get it done with all of the weird characters in the output.

Thanks.

Answer 1

The output you're looking at is a dictionary, so the information you want is already available. The 'u' that you see in the output dictionary indicates that the string is Unicode format.

I think the easy way to proceed to reach your goal of getting the information into a spreadsheet, is to just add the following in your script:

(in Python 2.x):

print outputdict['/Title'] + ", " + outputdict['/Subject']

This will give you output:

Wind Wave Float, Presentation from...

(replace outputdict above with whatever object is providing the dictionary output you've pasted in your question)

Answer 2

Try:

(?i)((?<=subject': u')[^']+|(?<=title': u')[^']+)

This regex will match Presentation from the 2011 Water Program Peer Review and Wind Wave Float from

{'/Subject': u'Presentation from the 2011 Water Program Peer Review', '/Producer': u'Mac OS X 10.7.2 Quartz PDFContext', '/Creator': u'PowerPoint', '/ModDate': u"D:20120109085812-07'00'", '/Keywords': u'', '/Title': u'Wind Wave Float', '/CreationDate': u'D:20111030043455Z'}

It is basically matching anything after subject': u' or /Title': u' that isnt a ' .

Answer 3

Try this regex:

'/(Subject|Title)':\s+u('[^']+'|"[^"]+")(?=, )

Description

Demo

https://www.debuggex.com/r/k78fFPfoaOofugig