!SLIDE
# Part II: Beginnings

So, let's say we're new to Python.

Let's get started!

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# Step 1: Pick a Release.
Pick carefully.


!SLIDE incremental
# Step 2: Install Python.

Decisions, decisions.

* Download installer from python.org?
* 32bit or 64bit?
* Build from source?
* If so, Unix or framework build?

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# Step 3: Profit!

Let's play around. Maybe play with the GitHub API?


!SLIDE small code execute
# Ruby.
    @@@ ruby
    require 'net/http'
    require 'uri'

    uri = URI.parse('https://api.github.com/user')

    http = Net::HTTP.new(uri.host, uri.port)
    http.use_ssl = true

    req = Net::HTTP::Get.new(uri.request_uri)
    req.basic_auth('username', 'password')

    r = http.request(req)

    puts r

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# http/url/lib/2
- Extremely unclear why there are so many modules.
- Search implies urllib2.
- Let's give this a shot...

!SLIDE smaller code execute
# Python (hours later).
    @@@ python
    import urllib2

    gh_url = 'https://api.github.com/user'

    req = urllib2.Request(gh_url)

    password_manager = urllib2.HTTPPasswordMgrWithDefaultRealm()
    password_manager.add_password(None, gh_url, 'user', 'pass')

    auth_manager = urllib2.HTTPBasicAuthHandler(password_manager)
    opener = urllib2.build_opener(auth_manager)

    urllib2.install_opener(opener)

    handler = urllib2.urlopen(req)

    print handler.read()

!SLIDE smaller code execute
#But wait — there's more!

    @@@ python

    import re

    class HTTPForcedBasicAuthHandler(HTTPBasicAuthHandler):

        auth_header = 'Authorization'
        rx = re.compile('(?:.*,)*[ \t]*([^ \t]+)[ \t]+'
                        'realm=(["\'])(.*?)\\2', re.I)

        def __init__(self,  *args, **kwargs):
            HTTPBasicAuthHandler.__init__(self, *args, **kwargs)s

        def http_error_401(self, req, fp, code, msg, headers):
            url = req.get_full_url()
            response = self._http_error_auth_reqed(
                'www-authenticate', url, req, headers)
            self.reset_retry_count()
            return response

        http_error_404 = http_error_401

!SLIDE
# Admit it.

If this was you, you'd leave Python and never come back.

!SLIDE
# Step 3: Install Packages.
* Setuptools? Distribute?
* Pip? Easy_install?

!SLIDE
# "I'll just stick my dependencies in the path."

* Only works for pure-python modules.
* Only works with relative imports.

* Virtualenv?

* Easy_uninstall?


!SLIDE
# Common Pitfalls
* easy_uninstall?

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# Installing Dependencies

* Pip? Virtualenv? Never mentioned in the docs.
* python-mysql
* mod_wsgi

# Integration Time

!SLIDE
# PIL

(On OSX, this is simple)