m0rin09ma3 planetparser_rss_v2 20130716-131823

Prerequisite

I installed feedparser modules for this assignment in my 'virt1' environment.

(virt1) $ yolk -l
Python          - 2.7.5        - active development (/usr/lib/python2.7/lib-dynload)
beautifulsoup4  - 4.2.1        - active
feedparser      - 5.1.3        - active
lxml            - 3.2.1        - active
pip             - 1.3.1        - active
requests        - 1.2.3        - active
setuptools      - 0.6c11       - active
wsgiref         - 0.1.2        - active development (/usr/lib/python2.7)
yolk            - 0.4.3        - active

This program will read RSS1.0, RSS2.0, or ATOM feed and output author and title. Default is RSS1.0.

$ python planetparser_rss_v2.py -h
Usage: planetparser_rss_v2.py [options]

Options:
  -h, --help            show this help message and exit
    -f FORMAT, --format=FORMAT
                            format: rss10, rss20, or atom

A link to the source code.

Sample output:

Casper: Installation de seeks
Fedora Indonesia: Mengembalikan Repository Fedora 19 Yang Hilang
Amit Saha: /proc/cpuinfo on various architectures

Explanation

First of all, setup optionparser

parser = OptionParser()
parser.set_defaults(rss_format="rss10")
parser.add_option("-f", "--format", dest="rss_format",
                 help="format: rss10, rss20, or atom", metavar="FORMAT")
(option, args) = parser.parse_args()
#print 'RSS format is %s' % option.rss_format

Retrieve data from URL and store them into a string.

# fetch data
s_url = 'http://planet.fedoraproject.org/' + \
        option.rss_format + \
        '.xml'
f = feedparser.parse(s_url)
#print 'Total number of post: %d' % len(f)

Retrieve blog author & title

if option.rss_format == 'atom': # ATOM
    for a, t in zip( \
        [f.entries[i].author for i in range(len(f))], \
        [f.entries[i].title for i in range(len(f))]):
        print '%s: %s' % (a, t)
else: # RSS1.0 and RSS2.0
    for i in range(len(f)):
        print f.entries[i].title