Question

Based on the following examples of function calls and the respective return values, guess what are the signatures of the functions and then implement them. You are not allowed to use: a) modules, b) slicing, c) aliases, d) the list comprehension syntax (if you don’t know what that is then you can’t use it either).

Function 3: In this function you must both return a value and modify in-place the input
parameter (when needed). The only functions you are allowed to use are range(), len(),
append(), insert(), remove(), pop() and the del keyword.
• Examples:
  return value argument value after return
◦ func3([4,-3,7,-5,1]) → [-3,-5] [4,7,1]
◦ func3([4,-3,7,-5,1], 4) → [-3,-5,1]    [4,7]
◦ func3([4,-3,7,-5,1], 10) → [4,-3,7,-5,1] [ ]

Answer 1

def func3(numbers,separator=0):
    '''
    returns a list of numbers from the list numbers less than separator
    default value for separator is 0
    the list numbers is modified to contain numbers greatr than or equal to separaor
    '''
    less=[]
    indice=[]
    for i in range(len(numbers)):
        if numbers[i]<separator:
            indice.append(i)

    j=0
    for i in indice:
        less.append(numbers[i-j])
        del numbers[i-j]
        j=j+1

    return less