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Combining tuples in list of tuples in Python
For data analysis, we sometimes take a combination of data structures available in python. A list can contain tuples as its elements. In this article we will see how we can combine each element of a tuple with another given element and produce a list tuple combination.
With for loop
In the below approach we create for loops that will create a pair of elements by taking each element of the tuple and looping through the element in the list.
Example
Alist = [([2, 8, 9], 'Mon'), ([7, 5, 6], 'Wed')]
# Given list of tuple
print("List of tuples :
",Alist)
# Combine tuples in list of tuples
res = [(t1, t2) for i, t2 in Alist for t1 in i]
# print result
print("The list tuple combination :
" ,res)Output
Running the above code gives us the following result −
List of tuples : [([2, 8, 9], 'Mon'), ([7, 5, 6], 'Wed')] The list tuple combination : [(2, 'Mon'), (8, 'Mon'), (9, 'Mon'), (7, 'Wed'), (5, 'Wed'), (6, 'Wed')]
With product
The itertools module has iterator named product which creates Cartesian product of parameters passed onto it. In this example we design for loops to go through each element of the tuple and form a pair with the non-list element in the tuple.
Example
from itertools import product
Alist = [([2, 8, 9], 'Mon'), ([7, 5, 6], 'Wed')]
# Given list of tuple
print("List of tuples :
",Alist)
# Combine tuples in list of tuples
res = [x for i, j in Alist for x in product(i, [j])]
# print result
print("The list tuple combination :
" ,res)Output
Running the above code gives us the following result −
List of tuples : [([2, 8, 9], 'Mon'), ([7, 5, 6], 'Wed')] The list tuple combination : [(2, 'Mon'), (8, 'Mon'), (9, 'Mon'), (7, 'Wed'), (5, 'Wed'), (6, 'Wed')]
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