simple_record | An ActiveRecord like interface for SimpleDB | Web Framework library
kandi X-RAY | simple_record Summary
kandi X-RAY | simple_record Summary
An ActiveRecord like interface for SimpleDB. Can be used as a drop in replacement for ActiveRecord in rails.
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simple_record Key Features
simple_record Examples and Code Snippets
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QUESTION
Good Morning,
Recently I picked up python and web scraping as a hobby ...
I'm trying to get my head around an issue with python lxml and xpath predicates but alas - apparently there's nothing similar on stackoverflow. So I managed to reproduce in below code, hoping someone sees what I don't ...
Is there somebody who can explain why the Result3 is an empty list? I was expecting Result3 to be the same as Result1.
How can I achieve that Result3 = Result1 ?
Versions: Python 3.7.3, lxml 4.4.0 (installed using pip, not Christoph Gohlke's binary) on an AMD windows machine.
Thanks in advance!
Stef
...ANSWER
Answered 2019-Aug-03 at 18:21Your predicate in the third example (@href[contains(@href,"some_file")]
), translated into English means "find a node in simple_record
which has an attribute href
which itself has an attribute href
which has an attribute value containing the string some_file
". Such node doesn't exist, so an empty result list is returned.
What you intended to ask, in English, is "find a node in simple_record
which has an attribute href
which has a value containing the string some_file
" (Thanks @DanielHaley!) . Translated into xpath, you would write it as
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Install simple_record
Install gem install simple_record
Create a model require 'simple_record' class MyModel < SimpleRecord::Base has_strings :name has_ints :age end
Setup environment AWS_ACCESS_KEY_ID='XXXX' AWS_SECRET_ACCESS_KEY='YYYY' SimpleRecord.establish_connection(AWS_ACCESS_KEY_ID,AWS_SECRET_ACCESS_KEY)
Go to town # Store a model object to SimpleDB mm = MyModel.new mm.name = "Travis" mm.age = 32 mm.save id = mm.id # Get an object from SimpleDB mm2 = MyModel.find(id) puts 'got=' + mm2.name + ' and he/she is ' + mm.age.to_s + ' years old' # Or more advanced queries? mms = MyModel?.find(:all, ["age=?", 32], :order=>"name", :limit=>10)
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