'''
PYTHON CODING CHALLENGE - SUBTRACT NEAREST NUMBERS
write code to subtract 2 numbers nearest each other.
print results as shown
nums = [25, 73, 42, 20, 95, 9, 27, 16, 55, 3]
output: 'Difference of closest pair is: 27-25=2'
bonus: subtract all numbers in closest pairs
output:['27-25=2','20-16=4','9-3=6','55-42=13','95-73=22']
share your code in some useful way, that makes testing your code easy for others in group.
'''


nums = [25, 73, 42, 20, 95, 9, 27, 16, 55, 3]
nums.sort()
print(nums)

output = []

[ [output.append( (str(x) + '-' + str(y) + '=' + str(x - y), x-y) )for x in nums if x > y and y==nums[nums.index(x)-1] ] for y in nums ]
print(output)

output.sort(key=lambda x: x[1])
print(output)
print('Difference of closest pair is: ' + output[0][0])