On 9/17/2010 9:08 AM, M. 427 wrote:
Hello,
(I am very new to python)
I built a dictionary d={} of lists similar to this :
d = {
'a': ['apricot', 'apple'],
'b': ['beach', 'bear', 'bottle'],
'c': ['cold', 'cook', 'coleslaw'],
'd': ['deep'],
'e': ['expression', 'elephant']
}
Now i want to go through this dictionary and remove all rows containing
only one entry. How should I do that?
We like to help when you tell us what part(s) of the answer you know.
There are 4 things involved here:
1 - How to get a list of all the key-value pairs in a dictionary.
2 - How to loop thru that list.
3 - How to get the length of a value's list.
4 - How to test that for equal to 1.
5- How to delete a dictionary entry knowing the key.
Which of those do you know? Which do you need help with?
Question 2 : where should I have found this answer myself? (apart from
here)
It is hard to give a specific answer since we don't know what you don't
know.
I suspect most tutorials will give you the answers.
In the Python Reference /6.8 Mapping Type - dict /it tells you the
answers to 1 and 5.
In the Python Reference /6.6.4. Mutable Sequence Types/ it tells you the
answer to 3.
In the Python Reference /5.9 Comparisons/ it tells you the answer to 4.
Regarding 3 there are several ways to loop through a sequence. Tutorials
explain these.
--
Bob Gailer
919-636-4239
Chapel Hill NC
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