bookData.py

   1 from urllib2 import urlopen,URLError
   2 from json import load,dumps
   3
   4 """ Library Book Type Description:
   5 The book is a dictionary of the form { string : a, ... }
   6
   7 Keys:
   8   required: (ideally)
   9     title - Book/Article title
  10     publisher - string containing semi-colon separated list eg. "UW Press; CSC, inc."
  11     authors - as above. each name is of the form "First Initials. Last" eg. "Calum T. Dalek; Conan T.B. Ladan"
  12   optional:
  13     subtitle - string
  14     edition - integer
  15     isbn - integer (it's preferred to use the isbn-13 rather than isbn-10)
  16     lccn - integer: library of congress catalogue number
  17     publish date - string of date (to make things easier to code/catalogue (won't be stored)
  18     publish year - int (this kind of thing will have to be confirmed by cataloguer)
  19     publish month - int
  20     publish location - like publisher
  21
  22     pages - integer - just the number of pages
  23     pagination - string eg. "xviii, 1327-1850"
  24     weight - string (purely for interest's sake eg. "3lb." or "3 pounds"
  25     categories - list of strings?
  26 """
  27
  28
  29 # look up data from openlibrary.org using isbn
  30 def openLibrary(ISBN):
  31     isbn = str(ISBN)
  32     try:
  33         jsondata = urlopen("http://openlibrary.org/api/books?format=json&jscmd=data&bibkeys=ISBN:"+isbn, timeout=3)
  34     except URLError:
  35         return {}
  36     openBook = load(jsondata)
  37     if "ISBN:"+isbn not in openBook:
  38         return {'isbn':isbn,'title':'Book not found'}
  39     openBook = openBook["ISBN:"+isbn]
  40     # create my custom dict for books with the info we want.
  41     book = {"isbn" : isbn}
  42     book["title"]=openBook["title"]
  43     book["authors"]=""
  44     if "authors" in openBook:
  45         for v in openBook["authors"]:
  46             book['authors'] += "; " + v['name']
  47         book['authors'] = book['authors'][2:]
  48     book["publisher"]=""
  49     if "publishers" in openBook:
  50         for v in openBook["publishers"]:
  51             book["publisher"] += "; " + v['name']
  52         book['publisher'] = book['publisher'][2:]
  53     if "publish_places" in openBook:
  54         book["publish location"]=""
  55         for v in openBook["publish_places"]:
  56             book["publish location"] += "; " + v['name']
  57         book['publish location'] = book['publish location'][2:]
  58
  59     # for lccn, there maybe be multiple values in the query. I'm just taking the first, but the full list may be useful
  60     if "lccn" in openBook['identifiers']:
  61         book["lccn"]=int(openBook['identifiers']['lccn'][0])
  62     if "publish_date" in openBook:
  63         book['publish date']=openBook['publish_date']
  64         #code to pull out year and month (hopefully)
  65     if "number_of_pages" in openBook:
  66         book["pages"]=openBook["number_of_pages"]
  67     if "pagination" in openBook:
  68         book["pagination"]=openBook["pagination"]
  69     if "weight" in openBook:
  70         book["weight"]=openBook["weight"]
  71     if "subtitle" in openBook:
  72         book["subtitle"]=openBook["subtitle"]
  73     return book
  74