how to create list of list in python constructor

Question

I am trying to create list of list using different functions inside the class by calling an constructor array but it is giving one list

I want to specifically use build and build1 both the functions

class Sample:
   def __init__(self):
        self.add = list()

   def build(self,name):
        self.add.append(name)

   def build1(self,loc):
        self.add.append(loc)


s = Sample()
a1 = ["mohan,ps","gandhi,as"]
for a in a1:
    split_values = a.split(",")
    s.build(split_values[0])
    s.build1(split_values[1])

print s.add

Output

['mohan', 'ps', 'gandhi', 'as']

expected output:

[['mohan', 'ps'],['gandhi', 'as']]

How to get results as expected output

@Jean-FrançoisFabre I don't believe this is a duplicate. OP wants to use the two function they specified. It's less about splitting the values than it is about creating a list of lists through a Class. — Bram Vanroy, May 17 '18 at 07:59

Rakesh · Answer 1 · 2018-05-17T08:10:57.473

0

You can try this.

class Sample:
   def __init__(self):
        self.add = list()

   def build(self,name):
        self.add.append(name)

   def build1(self,loc):
        self.add[-1].append(loc)     #Use negative index to append.


s = Sample()
a1 = ["mohan,ps","gandhi,as"]
for a in a1:
    split_values = a.split(",")
    s.build([split_values[0]])
    s.build1(split_values[1])

print s.add

Output:

[['mohan', 'ps'], ['gandhi', 'as']]

edited May 17 '18 at 08:10

answered May 17 '18 at 07:55

Rakesh

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i specifcally want to use build and build1 both the functions – Rakesh moorthy May 17 '18 at 07:56
Updated snippet. – Rakesh May 17 '18 at 08:03

how to create list of list in python constructor

1 Answers1