PYTHON

python merge lists

# Basic syntax:
first_list.append(second_list) # Append adds the second_list as an
#	element to the first_list
first_list.extend(second_list) # Extend combines the elements of the 
#	first_list and the second_list

# Note, both append and extend modify the first_list in place

# Example usage for append:
first_list = [1, 2, 3, 4, 5]
second_list = [6, 7, 8, 9]
first_list.append(second_list)
print(first_list)
--> [1, 2, 3, 4, 5, [6, 7, 8, 9]]

# Example usage for extend:
first_list = [1, 2, 3, 4, 5]
second_list = [6, 7, 8, 9]
first_list.extend(second_list)
print(first_list)
--> [1, 2, 3, 4, 5, 6, 7, 8, 9]

python concatenate lists

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]

concatenate list of strings python

listvalues = ['a', 'b', 'c']
concstring = ''.join(l)

Merge lists

data1 = [1, 2, 3]
data2 = [4, 5, 6]

data = data1 + data2

print(data)

# output : [1, 2, 3, 4, 5, 6]

how to concatenate two lists in python

list1 = ["Hello ", "take "]
list2 = ["Dear", "Sir"]

resList = [x+y for x in list1 for y in list2]
print(resList)

#['Hello Dear', 'Hello Sir', 'take Dear', 'take Sir']

python concatenate list of lists

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

Concatenate lists

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

Concatenate List

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

concatenate list in python

# 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)

python concatenate list of lists

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

result = sum(x, [])

Python Program to Concatenate Two Lists

list_1 = [1, 'a']
list_2 = [3, 4, 5]

list_joined = list_1 + list_2
print(list_joined)

combine two lists python

listone = [1, 2, 3]
listtwo = [4, 5, 6]

joinedlist = listone + listtwo

Concatenate lists

>>> a = [1, 2, 3]
>>> b = [4, 5, 6]
>>> c = a + b
>>> print(c)
[1, 2, 3, 4, 5, 6]

Concatenate two lists

res = list1 + list2