hodorlive 1.2.2

xpath/css based scraper with pagination

A simple html scraper with xpath or css.

Install

pip install hodorlive

Usage

As python package

*WARNING: This package by default doesn’t verify ssl connections. Please check the `arguments <#arguments>`__ to enable them.*

from hodor import Hodor
from dateutil.parser import parse


def date_convert(data):
    return parse(data)

url = 'http://www.nasdaq.com/markets/stocks/symbol-change-history.aspx'

CONFIG = {
    'old_symbol': {
        'css': '#SymbolChangeList_table tr td:nth-child(1)',
        'many': True
    },
    'new_symbol': {
        'css': '#SymbolChangeList_table tr td:nth-child(2)',
        'many': True
    },
    'effective_date': {
        'css': '#SymbolChangeList_table tr td:nth-child(3)',
        'many': True,
        'transform': date_convert
    },
    '_groups': {
        'data': ['old_symbol', 'new_symbol', 'effective_date']
    },
    '_paginate_by': {
        'xpath': '//*[@id="two_column_main_content_lb_NextPage"]/@href',
        'many': False
    }
}

h = Hodor(url=url, config=CONFIG, pagination_max_limit=5)

h.data

Arguments

• ua (User-Agent)

• proxies (check requesocks)

• auth

• crawl_delay (crawl delay in seconds across pagination - default: 3 seconds)

• pagination_max_limit (max number of pages to crawl - default: 100)

• ssl_verify (default: False)

• robots (if set respects robots.txt - default: True)

• reppy_capacity (robots cache LRU capacity - default: 100)

• trim_values (if set trims output for leading and trailing whitespace - default: True)

Config parameters:

• By default any key in the config is a rule to parse.

  • Each rule can be either a xpath or a css

  • Each rule can extract many values by default unless explicity set to False

  • Each rule can allow to transform the result with a function if provided

• Extra parameters include grouping (_groups) and pagination (_paginate_by) which is also of the rule format.