COP4521 Homework 1

Name:                         FSU login:

1 (10 points). The content of file aa.py is as follows:
--
print("aa.py Top level", __name__)
def hello():
    print("Hello from", __name__)
--

The content of file bb.py is as follows:
--
import aa

print("bb.py Top level", __name__)
aa.hello()
--

What is the output when we run bb with 'python3 bb.py' on linprog? (5 points)
Explain why each line is printed as it is (5 points)













2 (10 points). Consider the following code segment:

def addObj(a, b):
    a.append(b)
    print('Inside 1: a = ', a)
    a = a + [b]
    print('Inside 2: a = ', a)

lst = [1, 2, 3]
addObj(lst, 100)
print('Outside: lst = ', lst)

What is the output when the code segment is executed? (5 points)
Explain why each line is printed as it is (5 points)







3. (10 points) Let a function prototype be

def foo(arg1, arg2, arg3, arg4 = 1, arg5 = "one"):

Which of the following function calls are valid in python:

foo('aaa', 'bbb', 'ccc')
foo(arg2 = 'bbb', arg1 = 'aaa', 'bbb')
foo('aaa', 'ccc', arg5='ddd', arg2='bbb')
foo('aaa', arg3 = 'bbb', arg2 = 'ccc', arg5='ddd')
foo(arg5 = 'eee', arg4 = 2,  arg3 = 'ccc', arg2 = 'bbb', arg1 = 'bbb')






4. (10 points) Write a function that can take any number of positional arguments followed by
any number of keyword arguments. The function then prints the last positional argment and the
last keyword arguments.









5 (20 points). Let the content of foo.py be the following:

------------
count = 0

def printUpdateCount():
    print(count)
    for i in range (0, 4):
        count = 4

print(count)
printUpdateCount()
-------------

What is the output when you run the code with 'python3 foo.py' on linprog (10 points)?
Explain your answer (10 points)







6 (20 points). What is the output of the following code segment when executed
(10 points)? Briefly explain (10 points).

def aaa(x):
    def bbb(y):
        c = x * x
	return c * y

    return bbb

area10 = aaa(10)

print(area10(3))
print(area10(5))









7 (20 points). Let a sequence of numbers be 5, 5, 3, 7, 1, 9, ...
More precisely, the first three numbers are x_1= 5, x_2=5, and x_3 = 3.
Following that x_i = x_{i-3} + x_{i-2} - x_{i-1}. For example,
x_4 = x_1 + x_2 - x_3 = 5 + 5 - 3 = 7; x_5 = x_2 + x_3 - x_4 = 5 + 3 - 7 = 1;
and so on. Write a generator for this sequence.