How to sort nested tuples.

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Write a python program to define a tuple to accept 3 food product details such as Products name with their Price and Expiry date in a sub tuple then,arrange the tuple of tuple elements based on their price in ascending order.

I should not use lambda or sorted function, i can use bubble sort,insertion sort and selection sort

def sort(lst):
for i in range(0,len(lst)):
for j in range(0,len(lst)-i-1):
if lst[j][0]<lst[j+1][0]:
key="lst[j]
" lst[j]="lst[j+1]
" lst[j+1]="key
return" tuple(lst)
lst="list(t)
sort(lst)

<b">What I have tried:

see above pls
t=('CAKE', (748.0, '08-09-2020'), 'JELLY', (12.0, '08-09-2020'), 'CREAM', (244.0, '03-11-2020'))

Posted 2-Sep-20 4:07am

Member 14928977

Updated 2-Sep-20 5:11am

v3

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Sandeep Mewara · Accepted Answer · 2020-09-02T04:23:00

Solution 1

Using Bubble sort, it would be something like:

Python

def sortTuple(t):  
    for i in range(0, len(t)):  
        for j in range(0, len(t)-i-1):  
            if (t[j][1] > t[j + 1][1]):  #notice here, I have used index 1 to use price as the value
                temp = t[j]  
                t[j]= t[j + 1]  
                t[j + 1]= temp  
    return t  
   
ex = [('apple', 10, '1/1/2021'), ('banana', 5,'1/1/2021'), ('mango', 20,'1/1/2021')] 
print(sortTuple(ex))

Output : [('banana', 5,'1/1/2021'), ('apple', 10, '1/1/2021'), ('mango', 20,'1/1/2021')]

So, all you need is to:
1. extract the price data out from tuple
2. use that data in a simple bubble sort algorithm

More about tuples: Python - Tuples - Tutorialspoint[^]

Posted 2-Sep-20 4:23am

Sandeep Mewara

v2

Comments

CPallini 2-Sep-20 10:40am

5.

Member 14928977 2-Sep-20 11:17am

but price and enquiry date is a sub tuple

Sandeep Mewara 2-Sep-20 23:23pm

def sortTuple(t):  
    for i in range(0, len(t)):  
        for j in range(0, len(t)-i-1):  
            if (t[j][1] > t[j + 1][1]):  #notice here, I have used index 1 to get sub tuple
                # print(t[j][1][0]) if you explicitly need to work with price
                # subtuples with price first is good enough in itself for comparison - they will sort properly
                temp = t[j]  
                t[j]= t[j + 1]  
                t[j + 1]= temp  
    return t  
   
ex = [('apple', (10, '10/1/2021')), ('banana', (5,'5/1/2024')), ('mango', (20,'1/1/2021'))] 
print(sortTuple(ex))

Sandeep Mewara 2-Sep-20 23:24pm

You have to try. Attempt and play to learn and see how it works.

Member 14928977 3-Sep-20 4:04am

THANKS, IT WORKED