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] ) 2 >>> numPairs( 4, [0,1,2,3] ) 1 >>> numPairs( 6, [0,1,2,3] ) 0 >>> numPairs( 4, [0,1,2,3,4,2]) 3 >>> numPairs( 4, [0,1,2,3,4,2,2] ) 5 >>> numPairs( 4, [0,1,2,3,4,2,2])==5 True

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] ) 2 >>> numPairs( 4, [0,1,2,3] ) 1 >>> numPairs( 6, [0,1,2,3] ) 0 >>> numPairs( 4, [0,1,2,3,4,2]) 3 >>> numPairs( 4, [0,1,2,3,4,2,2] ) 5 >>> numPairs( 4, [0,1,2,3,4,2,2])==5 True