Related Articles

# Python – Maximum Sum Record

• Last Updated : 30 Jan, 2020

Sometimes, while working with data, we might have a problem in which we need to find maximum sum between available pairs in list. This can be application to many problems in mathematics domain. Let’s discuss certain ways in which this task can be performed.

Method #1 : Using `max()` + list comprehension
The combination of this functions can be used to perform this task. In this, we compute the sum of all pairs and then return the max of it using max().

Attention geek! Strengthen your foundations with the Python Programming Foundation Course and learn the basics.

To begin with, your interview preparations Enhance your Data Structures concepts with the Python DS Course. And to begin with your Machine Learning Journey, join the Machine Learning - Basic Level Course

 `# Python3 code to demonstrate working of``# Maximum Sum Record``# Using list comprehension + max()`` ` `# initialize list``test_list ``=` `[(``3``, ``5``), (``1``, ``7``), (``10``, ``3``), (``1``, ``2``)]`` ` `# printing original list ``print``(``"The original list : "` `+` `str``(test_list))`` ` `# Maximum Sum Record``# Using list comprehension + max()``temp ``=` `[b ``+` `a ``for` `a, b ``in` `test_list]``res ``=` `max``(temp)`` ` `# printing result``print``(``"Maximum sum among pairs : "` `+` `str``(res))`
Output :

```The original list : [(3, 5), (1, 7), (10, 3), (1, 2)]
Maximum sum among pairs : 13
```

Method #2 : Using `max()` + lambda
This is similar to above method. In this the task performed by list comprehension is solved using lambda function, providing the sum computation logic. Returns the max. sum pair.

 `# Python3 code to demonstrate working of``# Maximum Sum Record``# Using lambda + max()`` ` `# initialize list``test_list ``=` `[(``3``, ``5``), (``1``, ``7``), (``10``, ``3``), (``1``, ``2``)]`` ` `# printing original list ``print``(``"The original list : "` `+` `str``(test_list))`` ` `# Maximum Sum Record``# Using lambda + max()``res ``=` `max``(test_list, key ``=` `lambda` `sub: sub[``1``] ``+` `sub[``0``])`` ` `# printing result``print``(``"Maximum sum among pairs : "` `+` `str``(res))`
Output :
```The original list : [(3, 5), (1, 7), (10, 3), (1, 2)]
Maximum sum among pairs : 13
```

My Personal Notes arrow_drop_up