mirror of
https://github.com/not-kennethreitz/python-for-humans.git
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Kenneth Reitz
163 lines
3.0 KiB
Markdown
163 lines
3.0 KiB
Markdown
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!SLIDE
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# Part II: Beginnings
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So, let's say we're new to Python.
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Let's get started!
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!SLIDE
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# Step 1: Pick a Release.
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Pick carefully.
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!SLIDE incremental
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# Step 2: Install Python.
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Decisions, decisions.
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* Download installer from python.org?
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* 32bit or 64bit?
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* Build from source?
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* If so, Unix or framework build?
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!SLIDE
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# Step 3: Profit!
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Let's play around. Maybe play with the GitHub API?
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!SLIDE small code execute
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# Ruby.
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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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!SLIDE
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# http/url/lib/2
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- Extremely unclear why there are so many modules.
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- Search implies urllib2.
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- Let's give this a shot...
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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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#But wait — 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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# http/url/lib/2
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- Which module to use?
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- Worst API ever.
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- An *extremely* common use case.
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- I'd rather be writing ColdFusion™.
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!SLIDE
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# XML
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- `etree` is terrible.
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- `lxml` is awesome, but difficult to install.
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!SLIDE
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# File and System Operations
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- sys | shutils | os | os.path | io
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- Really difficult to run external commands.
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- This blocks dev+ops folks from adopting Python.
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!SLIDE
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# Packaging and Depdencies
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- pip or easy install?
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- setuptools isn't included with python? Distribute?
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- No easy_uninstall?
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- Broken `setup.py`s
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- "Released" packages not in the Cheeseshop
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!SLIDE
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# Date[time]s.
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- Which module to use?
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- Timezones
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- The stdlib can generate but not parse ISO8601 dates
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!SLIDE
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# Unicode.
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- LOLWUT
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!SLIDE
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# Testing.
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!SLIDE
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# Installing Dependencies
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* Pip? Virtualenv? Never mentioned in the docs.
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* python-mysql
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* mod_wsgi
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!SLIDE
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# Integration Time
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!SLIDE
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# PIL
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(On OSX, this is simple)
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