Snipplr

(Python) Python - Dictionary - Does key exist? - denakitan

Fri, 30 Sep 2011 23:42:19 GMT

Snippet to verify whether or not a key exists in a python dictionary.

(Python) Swapping keys and values of a dictionary - Voil

Wed, 08 Dec 2010 21:00:41 GMT

Based on the example by [Mark Pilgrim](http://diveintopython3.org/about.html).

(Python) qPyDict - vkolev

Wed, 03 Nov 2010 02:21:43 GMT

It's absolutly the same as the gDict, that I wrote with pyGTK2, but now with Qt4 GUI just for testing.

(Python) tiles_visited - anosognosia

Tue, 08 Jun 2010 11:38:57 GMT

(Python) sorting a dictionary - magicrebirth

Mon, 17 May 2010 08:03:48 GMT

Dictionaries cant be sorted, so you need to transform it into a list and sort that one!

(Python) dict.items vs dict.iteritems - magicrebirth

Mon, 17 May 2010 06:49:51 GMT

When is it appropriate to use dict.items() vs dict.iteritems? Also, when is it appropriate to use range() vs xrange(). From my understanding, xrange() essentially gives you an iterator across a range, so it should be used when iterating. Should you only use range() when want to physically store the range as a list?

(Python) 'Dictionary Comprehensions' - magicrebirth

Mon, 17 May 2010 06:34:30 GMT

Although Python doesn't have built-in dictionary comprehensions, you can do something pretty close with little mess or code. Just use .iteritems() to turn your dict into a list, throw it in a generator expression (or list comprehension), and then cast that list back into a dict. For example, say I have a dictionary of name:email pairs, and I want to create a dictionary of name:is_email_at_a_dot_com pairs:

(Python) Dicts to Lists / Lists to Dicts - magicrebirth

Mon, 17 May 2010 06:33:09 GMT

Turning a dictionary into a list or an iterator is easy. To get a list of keys, you can just cast the dict into a list. It's cleaner, though to call .keys() on the dictionary to get a list of the keys, or .iterkeys() to get an iterator. Similarly, you can call .values() or .itervalues() to get a list or iterator of dictionary values. Remember though, that dicts are inherently unordered and so these values won't be in any meaningful order. To preserve both keys and values, you can turn a dict into a list or iterator of 2-item tuples by using .items() or .iteritems(). This is something that you'll probably do a lot, and isn't very exciting:

(Python) Creating Dictionaries - magicrebirth

Mon, 17 May 2010 06:30:32 GMT

Any keyword arguments you pass to the dict constructor are added to the newly created dictionary before returning. Of course, you are limited to the keys that can be made into keyword arguments: valid Python variable names.

(Python) Python: lambda in a dictionary - magicrebirth

Tue, 22 Dec 2009 15:31:26 GMT

(Python) Python: using Pickle to save a dictionary - magicrebirth

Tue, 22 Dec 2009 15:17:53 GMT

(Python) Python: from two lists to a dictionary - magicrebirth

Tue, 22 Dec 2009 15:10:27 GMT

create a dictionary from the data in two lists

(Python) Print keys, values for dictionary - dorseye

Sun, 23 Aug 2009 19:09:21 GMT

(Python) Pass list to dict() - dorseye

Wed, 19 Aug 2009 00:12:59 GMT

(Python) Regular Expression Key Clean - cthulhupunk0

Mon, 08 Jun 2009 17:46:42 GMT

(Python) Aggregator class for a dictionary of individual items - cthulhupunk0

Mon, 08 Jun 2009 12:33:54 GMT

(Python) Dictionary Class - kangell

Tue, 08 Apr 2008 23:06:14 GMT

This bit of code allows you to turn code that looks like this: x = {'foo':1, 'bar':2 } x['foo'] = 3 Into this: x = dictclass( {'foo':1, 'bar':2 } ) x.foo = 3

(Python) Python - Cattura tutti i links - whitetiger

Thu, 09 Nov 2006 23:55:53 GMT

(Python) Python - Uso di wx.PostEvent - whitetiger

Thu, 09 Nov 2006 23:55:52 GMT

(Python) Python - Stampa i links di una pagina HTML - whitetiger

Thu, 09 Nov 2006 23:55:52 GMT