CODEWITHSUNDEEP
pythonpython-3.xlisttuples
user3448011
user3448011

Reputation: 1599

find tuple with min sum in a python list

In a list of python tuple, I need to find the tuple with min sum.

for example,

a = [ (2, 6) , (1,3) , (0,2) ]

(0, 2) should be returned because its sum is minimal.

I know how to do it by list comprehension and then find the smallest tuple sum. 

 minTuple = min([((x[0] + x[1]), (x[0], x[1])) for x in a ], key = lambda x : x[0] )

I would like to do it by map/lambda and list comprehension.

How to implement it efficiently?

Upvotes: 1

Views: 624

Answers (2)

Evan Weissburg
Evan Weissburg

Reputation: 1594

The simplest answer to your question is just to use the min() function, provided with a key to the array. The key parameter specifies a set of rules for comparison that min() uses to evaluate the tuples.

See answer here.

min(a, key=sum)

Upvotes: 3

Javier
Javier

Reputation: 1087

Try this!

>>> a = [ (2, 6) , (1,3) , (0,2) ]
>>> min(a, key=sum)
(0, 2)

>>> a = [ (2, 6) , (1,3) , (0,7) ]
>>> min(a, key=sum)
(1, 3)

Upvotes: 2

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