CODEWITHSUNDEEP
python
saifuddin778
saifuddin778

Reputation: 7287

Reshaping a python list while keeping the order

If I have a python list with the shape like this:

T = [
['07,07,2012 22:10', ['people','drama','melody','bun']],
['08,07,2012 21:04', ['queen','group']],
['08,07,2012 21:23', ['printing','market','shopping']],
['08,07,2012 21:04', ['people','bun']],
['08,11,2012 11:14', ['kangaroo']]
]

What I need is to convert this list into this format:

T =[
['07,07,2012 22:10', 'people'],
['07,07,2012 22:10', 'drama'],
['07,07,2012 22:10', 'melody'],
['07,07,2012 22:10', 'bun'],
['08,07,2012 21:04', 'queen'],
['08,07,2012 21:04', 'group'],
['08,07,2012 21:23', 'printing'],
['08,07,2012 21:23', 'market'],
['08,07,2012 21:23', 'shopping'],
['08,07,2012 21:04', 'people'],
['08,07,2012 21:04', 'bun'],
[''08,11,2012 11:14'', 'kangaroo']
]

i.e. For each element having length of its first sub-element greater than 1 (in the original list T), split the first sub-element (a[1] for a in T if len(a[1] > 1)) and append it as another list with the same time stamp. Maybe my words lack the explanation, but the samples above are definitely explaining what I need to do. Any help would be appreciated.

Upvotes: 0

Views: 109

Answers (2)

flornquake
flornquake

Reputation: 3386

Use a list comprehension:

[(timestamp, item) for timestamp, items in T for item in items]

This will give you a list of tuples, which is probably suitable here. But you can modify it to get a list of lists:

[[timestamp, item] for timestamp, items in T for item in items]

Upvotes: 5

Joohwan
Joohwan

Reputation: 2512

Try this on T:



def process(t):
    new = []
    for i in t:
        for j in i[1]:
            new.append([i[0], j])
    return new

Upvotes: 1

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