Adding list to a list in python

Question

I have code that generates a list (target = [ ]) by appending strings (token) to it.

Now I have another list say A = [['A', 'B'], ['C', 'D']] that I would like to add to the target list, without touching the original list. Just add on to the original, may I know how to do it? thanks

    def read_samples_by_string(self, path):
        for tokens in self.read_tokens(path):

            target =  []
            print(type(target))  # this is <type 'list'>
            
            for token in tokens:
                
                target.append(token)
                print(type(token))   # this is <type 'str'>               
            yield target
            print(target)

Input list : 
A = [['A', 'B'], ['C', 'D']]

output :
['O','X', 'Y', 'Z']
['L', 'M'] 
['J', 'K', 'W'] 

Expected output
['O','X', 'Y', 'Z']
['L', 'M'] 
['J', 'K', 'W'] 
['A', 'B']
['C', 'D']

How you are exporting the query?

D.J.
– D.J.

2020-05-24 03:12:39 +00:00
Commented May 24, 2020 at 3:12 — D.J.
– D.J., Commented May 24, 2020 at 3:12

Omkar Darves · Accepted Answer · 2021-03-19 11:26:49Z

2

final_list = []
list1 = [['A', 'B'], ['C', 'D']]
list2 = [['O','X', 'Y', 'Z'],['L', 'M'],['J', 'K', 'W']]

for l2 in list2:
    final_list.append(l2)

for l1 in list1:
    final_list.append(l1)

for l in final_list:
    print(l)

answered Mar 19, 2021 at 11:26

Omkar Darves

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