SimplePrograms challenge

Wed Jun 13 16:07:35 EDT 2007

Rob Wolfe wrote:
> Steven Bethard <steven.bethard at gmail.com> writes:
> 
>>> I vote for example with ElementTree (without xpath)
>>> with a mention of using ElementSoup for invalid HTML.
>> Sounds good to me.  Maybe something like::
>>
>> import xml.etree.ElementTree as etree
>> dinner_recipe = '''
>> <ingredients>
>> <ing><amt><qty>24</qty><unit>slices</unit></amt><item>baguette</item></ing>
>> <ing><amt><qty>2+</qty><unit>tbsp</unit></amt><item>olive_oil</item></ing>
>                                                       ^^^^^^^^^
> Is that a typo here?

Just trying to make Thunderbird line-wrap correctly. ;-) It's better 
with a space instead of an underscore.

>> <ing><amt><qty>1</qty><unit>cup</unit></amt><item>tomatoes</item></ing>
>> <ing><amt><qty>1-2</qty><unit>tbsp</unit></amt><item>garlic</item></ing>
>> <ing><amt><qty>1/2</qty><unit>cup</unit></amt><item>Parmesan</item></ing>
>> <ing><amt><qty>1</qty><unit>jar</unit></amt><item>pesto</item></ing>
>> </ingredients>'''
>> pantry = set(['olive oil', 'pesto'])
>> tree = etree.fromstring(dinner_recipe)
>> for item_elem in tree.getiterator('item'):
>>     if item_elem.text not in pantry:
>>         print item_elem.text
> 
> That's nice example. :)
> 
>> Though I wouldn't know where to put the ElementSoup link in this one...
> 
> I had a regular HTML in mind, something like:
> 
> <code>
> # HTML page
> dinner_recipe = '''
> <html><head><title>Recipe</title></head><body>
> <table>
> <tr><th>amt</th><th>unit</th><th>item</th></tr>
> <tr><td>24</td><td>slices</td><td>baguette</td></tr>
> <tr><td>2+</td><td>tbsp</td><td>olive_oil</td></tr>
> <tr><td>1</td><td>cup</td><td>tomatoes</td></tr>
> <tr><td>1-2</td><td>tbsp</td><td>garlic</td></tr>
> <tr><td>1/2</td><td>cup</td><td>Parmesan</td></tr>
> <tr><td>1</td><td>jar</td><td>pesto</td></tr>
> </table>
> </body></html>'''
> 
> # program
> import xml.etree.ElementTree as etree
> tree = etree.fromstring(dinner_recipe)
> 
> #import ElementSoup as etree                 # for invalid HTML
> #from cStringIO import StringIO              # use this
> #tree = etree.parse(StringIO(dinner_recipe)) # wrapper for BeautifulSoup
> 
> pantry = set(['olive oil', 'pesto'])
> 
> for ingredient in tree.getiterator('tr'):
>     amt, unit, item = ingredient.getchildren()
>     if item.tag == "td" and item.text not in pantry:
>         print "%s: %s %s" % (item.text, amt.text, unit.text)
> </code>
> 
> But if that's too complicated I will not insist on this. :)
> Your example is good enough.

Sure, that looks fine to me. =)

Steve