Question

Your task is to: 1. Introduce function documentation (the triple-quoted string that precedes the definition of a Python function) 2. Make sundry changes to improve the readability of the code. This might include: 1. Be sure to change the function names to something appropriate. 2. If there are any "gotchas" or assumptions about the input, document those. 3. If the variables are poorly named, change the variable names. 4. If the logic is needlessly complicated or redundant, abbreviate it. 3. You should not need to change any of the code's functionality in order to accomplish these tasks. The existing tests should still pass when you run the program.

Answer 1

Changes done for the readability of code are:

1. The given method sum() actually multiplies all the numbers passed as a list, but named as sum(). So change the method name to multiplyNumbers()
2. The variable name running_total is not appropriate as the method does product but not sum of numbers. So change the variable name from running_total to running_product
3. Added documentation for the method multiplyNumbers()

Program:

1#Change method name from sun to multiplyNumbers 2 def multiplyNumbers(x): 4 mulitplyNumbers(...) multiplyNumbers (iterable) -value 6 7 8 9 10 Return the product of an iterable or sequence of numbers When the sequence is empty, returns 0 #empty list so return return 0 13 14 15 16 else: #initial product is 1 running-product = 1 for i in x: #multiply all the numbers in the list running_product *i 18 19 20 21 22 a-[o,1,3,5] 23b [-1,3,6,23,-9] 24 c-L-1,-3,- 25 d[o] 26 e 27 28#Tests for multiplyNumbers 29 assert(nultiplyNumbers(a)0) 30 assert(nultiplyNumbers(b) 3726) 31 assert(nultiplyNumbers (c) -15) 32 assert(nultiplyNumbers(d)0) 33 assert(nultiplyNumbers (e) 0) 34 print("All tests passed" #return product return running_product

Code:

#Change method name from sum to multiplyNumbers
def multiplyNumbers(x):
   """
   mulitplyNumbers(...)
       multiplyNumbers(iterable) -> value
  
       Return the product of an iterable or sequence of numbers
       When the sequence is empty, returns 0.
   """
   if x == []:
       #empty list so return 0
       return 0
   else:
       #initial product is 1
       running_product = 1
       for i in x:
           #multiply all the numbers in the list
           running_product *= i
       #return product
       return running_product
      
a = [0,1,3,5]
b = [-1,3,6,23,-9]
c = [-1,-3,-5]
d = [0]
e = []

#Tests for multiplyNumbers
assert(multiplyNumbers(a) == 0)
assert(multiplyNumbers(b) == 3726)
assert(multiplyNumbers(c) == -15)
assert(multiplyNumbers(d) == 0)
assert(multiplyNumbers(e) == 0)
print("All tests passed")

Output:

File Edit View Search Terminal Help All tests passed (program exited with code: θ) Press return to continue