CBSE solutions for कम्प्यूटर साइंस विद पाइथान [अंग्रेजी] कक्षा १२ chapter 4 - Exception Handling & Generate Functions [Latest edition]

What all can be possible outputs of the following code?

def myfunc(x=None):
    result = ""
    if x is None:
    result = "No argument given"
    elif x == 0:
    result = "Zero"
    elif 0 < x <= 3:
    result = "x is between 0 and 3"
 else:
        result = "x is more than 3"
 return result

We will try to read input from the user. Press Ctrl-d and see what happens:

>>> s = raw_input('Enter something --> ')

What will happen when following functions are executed?

def fib():
x,y = 1,1
while True:
yield x
x,y = y, x+y
def odd(seq):
for number in seq:
if number % 2:
yield number
def under Four Million(seq):
for number in seq:
if number > 4000000:
       break
yield number
       print sum(odd(underFourMillion(fib())))

Find out the situation(s) in which the following code may crash.

while loop == 1:
try:
     a = input('Enter a number to subtract from > ')
     b = input ('Enter the number to subtract > ')
     except NameError:
     print "\nYou cannot subtract a letter"
     continue
except SyntaxError:
print "\nPlease enter a number only."
continue
print a - b
try:
loop = input('Press 1 to try again > ')
except (NameError,SyntaxError):
loop = 0

Describe what the following module is doing:

c = start
while True:
value = yield c
if value != None:
c = value
         else:
            c += 1

When do we get a TypeError?

List the situation(s) in which the code may result in IOError?

What is the purpose of the yield statement?

How is yield different from return?

Write the syntax of the raise statement.

Write a function called oops that explicitly raises a Index Error exception when called. Then write another function that calls oops inside a try/except statement to catch the error. What happens if you change oops to raise Key Error instead of Index Error?

range() function in python does not include the stop value. Write a generator function equivalent to range() function that includes the stop value also. The function will take three arguments start, stop and step and will generate the desired list.

Write a function to find average of a list of numbers. Your function should be able to handle an empty list and also list containing string.

Write a function to generate cube's of numbers over time.

Write a program, to accept a date as day, month & year from user and raise appropriate error(s), if legal value(s) is not supplied. Display appropriate message till user inputs correct value(s).

Create a class Person to store personal information (of your choice) for a person. Ensure that while accepting the data incorrect entry is properly handled.