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concat list python

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Innocent Iguana answered on July 4, 2020 Popularity 10/10 Helpfulness 4/10

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concat list python

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list1 = [1,2]
list1 = [3,4]
concat_list1 = list1 + list2 # [1,2,3,4]
concat_list2 = list1.extend(list2) # [1,2,3,4]
concat_list3 = list1.append(list2) # [1,2,[3,4]] <-- list2 is considered 1 element

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Contributed on Jan 26 2023

Innocent Iguana

0 Answers Avg Quality 2/10

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python concatenate lists

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a = [1, 2, 3]
b = [4, 5]

# method 1:
c = a + b # forms a new list with all elements
print(c) # [1, 2, 3, 4, 5]

# method 2:
a.extend(b) # adds the elements of b into list a
print(a) # [1, 2, 3, 4, 5]

Popularity 10/10 Helpfulness 4/10 Language python

Source: stackoverflow.com

Tags: python py

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Contributed on May 31 2021

DenverCoder1

0 Answers Avg Quality 2/10

python concatenate list of lists

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sum([[1, 2, 3], [4, 5, 6], [7], [8, 9]],[])
# [1, 2, 3, 4, 5, 6, 7, 8, 9]

Popularity 10/10 Helpfulness 4/10 Language python

Source: stackoverflow.com

Tags: list

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Contributed on Jun 27 2022

Jonathan Rosenblatt

0 Answers Avg Quality 2/10

Concatenate lists

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>>> t1 = ['a', 'b', 'c']
>>> t2 = ['d', 'e']
>>> t1.extend(t2)
>>> print(t1)
['a', 'b', 'c', 'd', 'e']

Popularity 10/10 Helpfulness 3/10 Language python

Source: www.py4e.com

Tags: python py

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Contributed on Oct 21 2021

Odd Ox

0 Answers Avg Quality 2/10

python concatenate lists

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""" There are 3 methods: '+', list.append, list.extend() """

# '+'
list_one = [11, 12, 13]
list_two = [14, 15, 16]
answer = list_one + list_two
--> answer: [11,12,13,14,15,16]

# 'list.append'  adds items indivudually
# WARNING it treats a list as 1 item
first_list = [1, 2, 3, 4, 5]
second_list = [6, 7, 8, 9]
first_list.append(second_list)
--> first_list: [1, 2, 3, 4, 5, [6, 7, 8, 9]]

# 'extend'  adds to the end, only works when both are lists
first_list = [1, 2, 3, 4, 5]
second_list = [6, 7, 8, 9]
first_list.extend(second_list)
--> first_list: [1, 2, 3, 4, 5, 6, 7, 8, 9]

Popularity 9/10 Helpfulness 3/10 Language python

Source: flexiple.com

Tags: python py

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Contributed on Feb 01 2023

Jealous Joey

0 Answers Avg Quality 2/10

python concatenate list of lists

Comment

x = [["a","b"], ["c"]]

result = sum(x, [])

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Source: stackoverflow.com

Tags: list

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Contributed on Jul 04 2020

Puzzled Peacock

0 Answers Avg Quality 2/10

Concatenate List

Comment

sample_list1 = [0, 1, 2, 3, 4] 
sample_list2 = [5, 6, 7, 8] 
 
result = sample_list1 + sample_list2 
 
print ("Concatenated list: " + str(result))

Popularity 10/10 Helpfulness 2/10 Language python

Source: favtutor.com

Tags: list

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Contributed on Jan 24 2022

Itchy Impala

0 Answers Avg Quality 2/10

Python - How To Concatenate List of String

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'separator'.join([ 'List','of',' string' ])

Popularity 10/10 Helpfulness 2/10 Language python

Source: www.thecodeteacher.com

Tags: list

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Contributed on Jan 28 2022

thecodeteacher

0 Answers Avg Quality 2/10

concatenate list in python

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# There are many methods to do list concatenation
# Method 01
test_list1 = [1, 4, 5, 6, 5]
test_list2 = ['p', 'q', 'r', 's']
for i in test_list2 :
    test_list1.append(i)
print(test_list1)

# Method 02
test_list1 = [1, 4, 5, 6, 5]
test_list2 = ['p', 'q', 'r', 's']
test_list3 = test_list1 + test_list2
print(test_list3)

# Method 03
test_list1 = [1, 4, 5, 6, 5]
test_list2 = ['p', 'q', 'r', 's']
res_list = [y for x in [test_list1, test_list2] for y in x]
print(res_list)

# Method 04
test_list1 = [1, 4, 5, 6, 5]
test_list2 = ['p', 'q', 'r', 's']
test_list1.extend(test_list2)
print(test_list1)

# Method 05
test_list1 = [1, 4, 5, 6, 5]
test_list2 = ['p', 'q', 'r', 's']
res_list = [*test_list1, *test_list2]
print(res_list)

# Method 6
import itertools
test_list1 = [1, 4, 5, 6, 5]
test_list2 = ['p', 'q', 'r', 's']
res_list = list(itertools.chain(test_list1, test_list2))
print(res_list)

Popularity 10/10 Helpfulness 2/10 Language python

Source: www.geeksforgeeks.org

Tags: list

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Contributed on Aug 12 2022

Rajitha Amarasinghe

0 Answers Avg Quality 2/10

How do I concatenate lists in Python?

Comment

# define two lists
list1 = [1, 2, 3]
list2 = [4, 5, 6]

# concatenate the lists
new_list = list1 + list2
print(new_list)  # print as [1, 2, 3, 4, 5, 6]

# extend list1 with the elements of list2
list1.extend(list2)
print(list1)  # print as [1, 2, 3, 4, 5, 6]

Popularity 9/10 Helpfulness 2/10 Language python

Source: Grepper

Tags: python py

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Contributed on Jan 10 2023

Blasian

0 Answers Avg Quality 2/10

concat list python

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