$ pip install sec_edgar_wrapper

import json

from sec_edgar_wrapper import SECEdgarWrapper


api_call = SECEdgarWrapper(cik='0001263508', filing_type="13F")
page = api_call.next_page()
print(json.dumps(page, indent=2))

{
  "@xmlns": "http://www.w3.org/2005/Atom",
  "author": {
    "email": "[email protected]",
    "name": "Webmaster"
  },
  "company-info": {
    "addresses": {
      "address": [
        {
          "@type": "mailing",
          "city": "NEW YORK",
          "state": "NY",
          "street1": "667 MADISON AVE",
          "street2": "667 MADISON AVE",
          "zip": "10065"
        },
        {
          "@type": "business",
          "city": "NEW YORK",
          "phone": "2123395600",
          "state": "NY",
          "street1": "667 MADISON AVE",
          "street2": "667 MADISON AVE",
          "zip": "10065"
        }
      ]
    },
    "cik": "0001263508",
    "cik-href": "http://www.sec.gov/cgi-bin/browse-edgar?action=getcompany&CIK=0001263508&owner=exclude&count=40",
    "conformed-name": "BAKER BROS. ADVISORS LP",
    "fiscal-year-end": "1231",
    "formerly-names": {
      "@count": "1",
      "names": {
        "date": "2013-07-03",
        "name": "BAKER BROS ADVISORS LLC"
      }
    },
    "state-location": "NY",
    "state-location-href": "http://www.sec.gov/cgi-bin/browse-edgar?action=getcompany&State=NY&owner=exclude&count=40",
    "state-of-incorporation": "DE"
  },
  "entry": [
    {
      "category": {
        "@label": "form type",
        "@scheme": "http://www.sec.gov/",
        "@term": "13F-HR"
      },
      "content": {
        "@type": "text/xml",
        "accession-nunber": "0001144204-15-065993",
        "act": "34",
        "file-number": "028-10519",
        "file-number-href": "http://www.sec.gov/cgi-bin/browse-edgar?action=getcompany&filenum=028-10519&owner=exclude&count=40",
        "filing-date": "2015-11-16",
        "filing-href": "http://www.sec.gov/Archives/edgar/data/1263508/000114420415065993/0001144204-15-065993.txt",
        "filing-type": "13F-HR",
        "film-number": "151234425",
        "form-name": "Quarterly report filed by institutional managers, Holdings",
        "size": "65 KB"
      },
      "id": "urn:tag:sec.gov,2008:accession-number=0001144204-15-065993",
      "link": {
        "@href": "http://www.sec.gov/Archives/edgar/data/1263508/000114420415065993/0001144204-15-065993.txt",
        "@rel": "alternate",
        "@type": "text/html"
      },
      "summary": {
        "@type": "html",
        "#text": "<b>Filed:</b> 2015-11-16 <b>AccNo:</b> 0001144204-15-065993 <b>Size:</b> 65 KB"
      },
      "title": "13F-HR  - Quarterly report filed by institutional managers, Holdings",
      "updated": "2015-11-16T16:07:48-05:00"
    },