Given a list of tuples, write a Python program to convert it into a list.
Example
Input: [(11, 20), (13, 40), (55, 16)] Output:[11, 20, 13, 40, 55, 16] Input: [('Geeks', 2), ('For', 4), ('geek', '6')] Output: ['Geeks', 2, 'For', 4, 'geek', '6']
Convert List of Tuples to List of Lists in Python Methods
Convert lists of tuples into a list using Loop
This code initializes an empty list out and iterates through each tuple in lt and each item in the tuple, appending them to out.
Python3
# List of tuple initializationlt = [('Geeks', 2), ('For', 4), ('geek', '6')]# using nested for loopsout = []for t in lt: for item in t: out.append(item)# printing outputprint(out)#This code is contributed by Vinay pinjala. |
Output
['Geeks', 2, 'For', 4, 'geek', '6']
Convert lists of tuples into a list using List Comprehension
The given Python code converts a list of tuples into a single list using list comprehension. It iterates through each tuple and each item within the tuple, flattening the list.
Python3
# Python code to convert list of tuples into list# List of tuple initializationlt = [('Geeks', 2), ('For', 4), ('geek', '6')]# using list comprehensionout = [item for t in lt for item in t]# printing outputprint(out) |
Output
['Geeks', 2, 'For', 4, 'geek', '6']
Convert lists of tuples into a list using sum()
This code uses the sum() in Python.sum() function treats the tuples as sequences and performs element-wise addition, effectively concatenating them.
Python3
# Python code to convert list of tuple into list# List of tuple initializationtup = [(1, 2), (3, 4), (5, 6)]# using sum function()out = list(sum(tup, ()))# printing outputprint(out) |
Output
[1, 2, 3, 4, 5, 6]
Convert lists of tuples into list using Operator and Reduce
This code initializes a list of tuples named tup and then applies reduce() with the operator. concat to concatenate the tuples into a single sequence.
Python3
# Python code to convert list of tuple into listimport operatorfrom functools import reduce# List of tuple initializationtup = [(1, 2), (3, 4), (5, 6)]# printing outputprint(list(reduce(operator.concat, tup))) |
Output
[1, 2, 3, 4, 5, 6]
Convert lists of tuples into list using lambda
In this code, we are mapping the first and second values of the tuple of the list to the variables b and c and later we are typecasting the variable to the list and later we are combining the list.
Python3
# Python code to convert list of tuple into list# List of tuple initializationtup = [(1, 2), (3, 4), (5, 6)]# Using map for 0 indexb = map(lambda x: x[0], tup)# Using map for 1 indexc = map(lambda x: x[1], tup)# converting to listb = list(b)c = list(c)# Combining outputout = b + c# printing outputprint(out) |
Output
[1, 3, 5, 2, 4, 6]
Convert lists of tuples into a list Using Enumerate function
The code uses a list comprehension with two nested loops. The outer loop iterates over each tuple i in tup while also tracking the index with enumerate(). The inner loop iterates over each element j in the tuple.
Python3
tup = [('1', '2'), ('3', '4'), ('5', '6')]x=[int(j) for a,i in enumerate(tup) for j in i ]print(x) |
Output
[1, 2, 3, 4, 5, 6]
Convert lists of tuples into lists using zip
The code uses the zip() function to group the elements from the tuples together. By unpacking the zipped tuples using the * operator twice, the code extracts the elements from the tuples.
Python3
print(list(*zip(*[(1,), (2,), (3,)]))) |
Output
[1, 2, 3]
Convert lists of tuples into a list using eval
This code uses list comprehension with nested loops to iterate through each tuple and each element within the tuple, applying the eval() function to convert the strings to numeric values.
Python3
tup = [('1', '2'), ('3', '4'), ('5', '6')]x=[eval(j) for i in tup for j in i ]print(x) |
Output
[1, 2, 3, 4, 5, 6]
Convert lists of tuples into list using Recursive Method
The Python code defines a recursive function convert_to_list() that converts a list of tuples into a single list. The function takes a list of tuples as input and uses recursion to accumulate the elements of the tuples into a result list.
Python3
def convert_to_list(tuple_list, result=None): if result is None: result = [] if len(tuple_list) == 0: return result else: result.extend(tuple_list[0]) return convert_to_list(tuple_list[1:], result)# List of tuple initializationlt = [('Geeks', 2), ('For', 4), ('geek', '6')]out = convert_to_list(lt)# printing outputprint(out)#this code contributed by tvsk. |
Output
['Geeks', 2, 'For', 4, 'geek', '6']
Convert lists of tuples into a list using itertools
The provided Python code uses the itertools.chain() function to convert a list of tuples into a single list by concatenating the tuple elements. The resulting list is printed as the output.
Python3
# Python code to convert list of tuple into list# Importingimport itertools# List of tuple initializationtuple = [(1, 2), (3, 4), (5, 6)]# Using itertoolsout = list(itertools.chain(*tuple))# printing outputprint(out) |
Output
[1, 2, 3, 4, 5, 6]
