Split single list into multiple list in python

Question

I have a list which holds json objects like this

a =[{"User": "Ram","Product": "Soap","Price": "25"},
    {"User": "Ramesh","Product": "Shampoo","Price": "5"},
    {"User": "Ramesh","Product": "powder","Price": "35"}]

Now I want to split this single list into multiple list like this

a2 = [
      [{"User": "Ram","Product": "Soap","Price": "25"}],
      [{"User": "Ramesh","Product": "Shampoo","Price": "5"}],
      [{"User": "Ramesh","Product": "powder","Price": "35"}]
     ]

Can anyone tell me how I can achieve this solution, I am new to python.

I'm curious as to why you want these one-element lists.

PM 2Ring
– PM 2Ring

2015-12-31 06:10:19 +00:00
Commented Dec 31, 2015 at 6:10 — PM 2Ring
– PM 2Ring, Commented Dec 31, 2015 at 6:10

TigerhawkT3 · Accepted Answer · 2015-12-31 05:20:34Z

3

Just wrap each item in brackets:

a2 = [[item] for item in a]

answered Dec 31, 2015 at 5:20

TigerhawkT3

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2 Comments

Maari Over a year ago

Thanks it worked. Just out of curiosity is there a simpler way like this to do the vice-versa

TigerhawkT3 Over a year ago

Sure; a3 = [item[0] for item in a2].

Avinash Raj · Accepted Answer · 2015-12-31 05:20:31Z

3

Do like this,

[[i] for i in a]

answered Dec 31, 2015 at 5:20

Avinash Raj

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Comments

Adem Öztaş · Accepted Answer · 2015-12-31 07:33:11Z

0

Another solution,

new_a = map(lambda x: [x], a)

Output

[[{'Product': 'Soap', 'User': 'Ram', 'Price': '25'}], [{'Product': 'Shampoo', 'User': 'Ramesh', 'Price': '5'}], [{'Product': 'powder', 'User': 'Ramesh', 'Price': '35'}]]

edited Dec 31, 2015 at 7:33

answered Dec 31, 2015 at 6:16

Adem Öztaş

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Comments

Bryan Apperson · Accepted Answer · 2016-01-03 07:34:46Z

-1

This is a more verbose way to do it without the list comprehension from Avinash's answer.

def list_split(a):
    sp = []
    for element in a:
        sp.append([element])
    return sp

a2 = list_split(a)

edited Jan 3, 2016 at 7:34

answered Dec 31, 2015 at 5:31

Bryan Apperson

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2 Comments

TigerhawkT3 Over a year ago

The readability of comprehensions is a matter of perspective/opinion.

Bryan Apperson Over a year ago

Correct, that does not read the way I intended it to, replace readable with verbose. Apologies.

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