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numPairs Write a function numPairs that accepts two arguments, a target number and a list of numbers. The function then returns the count of pairs of numbers from the list that sum to the target number. In the first example the answer is 2 because the pairs (0,3) and (1,2) both sum to 3. The pair can be two of the same number, e.g. (2,2) but only if the two 2's are separate twos in the list. In the last example below, there are three 2's, so there are three different pairs (2,2) so there are 5 pairs total that sum to 4. Sample usage:

numPairs Write a function numPairs that accepts two arguments, a target number and a list of numbers. The function then returns the count of pairs of numbers from the list that sum to the target number. In the first example the answer is 2 because the pairs (0,3) and (1,2) both sum to 3. The pair can be two of the same number, e.g. (2,2) but only if the two 2's are separate twos in the list. In the last example below, there are three 2's, so there are three different pairs (2,2) so there are 5 pairs total that sum to 4. Sample usage:

Computer Networking: A Top-Down Approach (7th Edition)
Computer Networking: A Top-Down Approach (7th Edition)
7th Edition
ISBN:9780133594140
Author:James Kurose, Keith Ross
Publisher:James Kurose, Keith Ross
Chapter1: Computer Networks And The Internet
Section: Chapter Questions
Problem R1RQ: What is the difference between a host and an end system? List several different types of end...
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In Python IDLE: How would I write a function for the problem in the attached image?
numPairs Write a function numPairs that accepts two arguments, a target number and a list of numbers. The function then returns the count of pairs of numbers from the list that sum to the target number. In the first example the answer is 2 because the pairs (0,3) and (1,2) both sum to 3. The pair can be two of the same number, e.g. (2,2) but only if the two 2's are separate twos in the list. In the last example below, there are three 2's, so there are three different pairs (2,2) so there are 5 pairs total that sum to 4. Sample usage: >>> numPairs ( 3, [0,1,2,3] ) >>> numPairs( 4, [0,1,2, 3] ) 1 >>> numPairs( 6, [0,1,2,3] ) >>> numPairs( 4, [0,1,2,3,4,2] ) 3 >>> numPairs( 4, [0,1,2,3,4,2,2] ) >>> numPairs( 4, [0,1,2,3,4,2,2] )==5 True
Transcribed Image Text:numPairs Write a function numPairs that accepts two arguments, a target number and a list of numbers. The function then returns the count of pairs of numbers from the list that sum to the target number. In the first example the answer is 2 because the pairs (0,3) and (1,2) both sum to 3. The pair can be two of the same number, e.g. (2,2) but only if the two 2's are separate twos in the list. In the last example below, there are three 2's, so there are three different pairs (2,2) so there are 5 pairs total that sum to 4. Sample usage: >>> numPairs ( 3, [0,1,2,3] ) >>> numPairs( 4, [0,1,2, 3] ) 1 >>> numPairs( 6, [0,1,2,3] ) >>> numPairs( 4, [0,1,2,3,4,2] ) 3 >>> numPairs( 4, [0,1,2,3,4,2,2] ) >>> numPairs( 4, [0,1,2,3,4,2,2] )==5 True
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