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https://github.com/not-kennethreitz/python-for-humans.git
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Kenneth Reitz
169 lines
3.0 KiB
Markdown
169 lines
3.0 KiB
Markdown
!SLIDE bullets incremental
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# This is a serious problem.
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!SLIDE bullets incremental
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# The Solution is Simple.
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- Build elegant tools to perform these tasks.
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- Provide a real resource for learning.
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!SLIDE
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## Python needs more Pragmatic Packages.
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!SLIDE dark
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## pra•gmat•ic |pragˈmatik|, *adj*:
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Dealing with things sensibly and realistically in a way that is
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based on practical rather than theoretical considerations.
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!SLIDE
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# An Examples.
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### Let's mess around. Maybe play with the GitHub API?
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!SLIDE
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!SLIDE small code
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@@@ ruby
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require 'net/http'
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require 'uri'
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uri = URI.parse('https://api.github.com/user')
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http = Net::HTTP.new(uri.host, uri.port)
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http.use_ssl = true
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req = Net::HTTP::Get.new(uri.request_uri)
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req.basic_auth('username', 'password')
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r = http.request(req)
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puts r
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## Let's port this to Python.
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!SLIDE smaller code execute
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# Python (hours later).
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@@@ python
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import urllib2
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gh_url = 'https://api.github.com/user'
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req = urllib2.Request(gh_url)
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password_manager = urllib2.HTTPPasswordMgrWithDefaultRealm()
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password_manager.add_password(None, gh_url, 'user', 'pass')
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auth_manager = urllib2.HTTPBasicAuthHandler(password_manager)
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opener = urllib2.build_opener(auth_manager)
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urllib2.install_opener(opener)
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handler = urllib2.urlopen(req)
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print handler.read()
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!SLIDE smaller code execute
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#I lied — there's more!
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@@@ python
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import re
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class HTTPForcedBasicAuthHandler(HTTPBasicAuthHandler):
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auth_header = 'Authorization'
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rx = re.compile('(?:.*,)*[ \t]*([^ \t]+)[ \t]+'
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'realm=(["\'])(.*?)\\2', re.I)
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def __init__(self, *args, **kwargs):
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HTTPBasicAuthHandler.__init__(self, *args, **kwargs)s
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def http_error_401(self, req, fp, code, msg, headers):
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url = req.get_full_url()
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response = self._http_error_auth_reqed(
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'www-authenticate', url, req, headers)
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self.reset_retry_count()
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return response
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http_error_404 = http_error_401
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!SLIDE
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# Admit it.
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If this was you, you'd leave Python and never come back.
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!SLIDE
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# Break it down.
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!SLIDE
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# Enter Requests.
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!SLIDE
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# The Codez, they are ugleh.
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[trollface or something]
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!SLIDE
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## Unless there's an explicit requirement,
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## a student should never see urllib2.
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# No excuses.
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!SLIDE
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# Pragmatic Package.
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@@@ python
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import requests
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url = 'https://api.github.com/user'
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auth = ('username', 'password')
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r = requests.get(url, auth=auth)
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print r.content
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!SLIDE
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# Fit the 90% Use Case.
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!SLIDE
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# The API is all that matters.
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## Everything else is secondary.
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!SLIDE incremental bullets
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# I Mean ***Everything***.
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- Features.
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- Efficiency.
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- Performance.
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- Corner-cases.
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!SLIDE
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# urllib2
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"I'd rather be writing ColdFusion."
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!SLIDE small
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# subprocess
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A powerful module that .
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@@@ python
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import envoy
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c = envoy.run('ls')
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.
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@@@ pycon
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>>> c.status_code
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200
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