问题
In the Amazon Mechanical Turk command line tools (I am using version: aws-mturk-clt-1.3.0), in one of the samples (site_filter_qual: "Website Filtering Qualification", file site_filter_qual.question), there is code that looks something like this:
#set( $urls = [ "http://news.bbc.co.uk/", http://..., ...])
#foreach ( $url in $urls )
...
I am wondering :
- a) What is the language used here (it's not Perl and not PHP, right?);
- b) Where (on Amazon site or elsewhere) I could read about these constructs;
- c) How to implement tuples (pairs), e.g.
// in Python:
>> data = [("http://news.bbc.com", "NEWS"), ("http://google.com", "SEARCH"), ...]
>> for (url, category) in data:
>> ....
-- or something similar?
Thanks in advance!
回答1:
It's a Velocity template (part of the Apache project). The good news is that it's a reasonably flexible language that you can manipulate. The better news is that you can (since I believe all the CLT and SDK code is open) actually create new constructs to override or expand on anything that's not part of Velocity out-of-the-box.
To answer your questions directly:
a) Velocity
b) http://velocity.apache.org/
c) You can use two separate arrays. Not pretty, I realize, but it'll work.
来源：https://stackoverflow.com/questions/3348029/mechanical-turk-cmd-line-tools-qualification-set-and-foreach-in-xml