[issue12955] urllib.request example should use "with ... as:"

[Éric Araujo]

Éric Araujo <merwok at netwok.org> added the comment:

[Terry]
> But when I add 'http:www.python.org' as an argument, I get
> urllib.error.URLError: <urlopen error no host given>

Your URI lacks a host (netloc, in RFC parlance) component:
>>> urllib.parse.urlparse('http:python.org')
ParseResult(scheme='http', netloc='', path='python.org', params='', query='', fragment='')

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nosy: +eric.araujo

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<http://bugs.python.org/issue12955>
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