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Name: [002] Ian Ozsvald
Member: 105 months
Authored: 181 videos
Description: I am the co-founder of ShowMeDo (see http://showmedo.com/about), author of `The Screencasting Handbook <http://thescreencastinghandbook.com>`_ and the founder of the professional screencast production company `ProCasts <http://procasts.co.uk>`_: .. image:: http://procasts.co.uk/media/procasts_sma ...

dict [ID:752] (11/14)

in series: Python Beginners - Common Variables and Containers

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The dictionary (dict) datatype is also know as an associative array. We use a dictionary to build up a key->value mapping.

They are useful for very fast lookups (such as when caching) and for mapping general items together. Keys can be most normal datatypes but they have to be immutable - this means that you can't use a type such as a list as a key. Keys also have to be unique.

I show you how to build a dictionary, look at its contents, extract items, delete items and I also show you two novel ways of constructing dictionaries.

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  • Published: 73 months ago

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great vid keep up the good work. Please don't forget about doing a Python Gui design series in ubuntu using IDLE and Glade as the gui design app. Excellent video I look forward for more.


While watching [752] dict (11/14) I had an epiphany. This might be difficult to explain but I'll give it a shot.

When you were typing into IPython the last of you dict commands, you started with something like lookup = {[()]} then you filled in each set of brackets with the relevant info. I have not been doing that and have instead been typing commands strictly left to right, i.e. lookup = {...[...(..... which is VERY difficult to keep my straight. It appears as if you created the structure of the command first then filled in the relevant information which seems as if it would be less prone to errors. Thank you very much for all of your hard work on these video tutorials, i am learning a lot.

Robert


Good video/examples.


Great simple examples with a few extra advance examples. Thanks Again Ian your the man!


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