"John Gordon" <gor...@panix.com> wrote in message
news:keaa9v$1ru$1...@reader1.panix.com...
In <hkcdnwgroqkwfpxmnz2dnuvz_qadn...@o1.com> "Daniel W. Rouse Jr."
<dwrousejr@nethere.comNOSPAM> writes:
I have recently started learning Python (2.7.3) but need a better
explanation of how to use tuples and dictionaries.
A tuple is a linear sequence of items, accessed via subscripts that start
at zero.
Tuples are read-only; items cannot be added, removed, nor replaced.
Items in a tuple need not be the same type.
Example:
>>> my_tuple = (1, 5, 'hello', 9.9999)
>>> print my_tuple[0]
1
>>> print my_tuple[2]
hello
To me, this looks like an array. Is tuple just the Python name for an array?
A dictionary is a mapping type; it allows you to access items via a
meaningful name (usually a string.)
Dictionaries do not preserve the order in which items are created (but
there is a class in newer python versions, collections.OrderedDict, which
does preserve order.)
Example:
>>> person = {} # start with an empty dictionary
>>> person['name'] = 'John'
>>> person['age'] = 40
>>> person['occupation'] = 'Programmer'
>>> print person['age']
40
Dictionaries can also be created with some initial values, like so:
>>> person = { 'name': 'John', 'age': 40, 'occupation' : 'Programmer' }
Thank you, I understand it better it is kind of like a hash table.
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