parselab

This package contains classes that help to write parsers in Python.

Installation

pip3 install parselab

Usage

To use parelab just create a class derived from BasicParser.

from parselab.cache import FileCache
from parselab.network import NetworkManager
from parselab.parsing import BasicParser

class MyParser(BasicParser):

    def __init__(self):
        self.cache = FileCache(namespace='my-parser', path=os.environ.get('CACHE_PATH'))
        self.net = NetworkManager()
        db.connect(os.environ['PARSINGDB'])
        db.setup_project('my-project')

After that you will be able to download pages using BasicParser.get_page() method:

class MyParser(BasicParser):
    ...

    def run(self):
        page = self.get_page('https://google.com')

BasicParser will use network manager specified in __init__ method and will save all downloaded pages into directory specified by your $CACHE_PATH environment variable. Next time you invoke get_page() method it will get the requested page from cache if available.