Using Python Libraries Sumita Arora Practical Class 12 Computer science Solution

Using Python Libraries Sumita Arora Practical Class 12 Computer science Solution

P.I.P :- 4.1

Q1. Consider the code of module welcome.py given below

#welcome.py
"""
welcome
~~~~~~~
This module contains the greeting message 'msg' and greeting function 'greet()'.
"""
msg = 'Hello' # Global Variable
def greet(name): # Function
    print('{}, {}'.format(msg, name))

Now carefully go through the code statements given below and figure out what will be their output. Every successive statement should assume that previous code statements hold i.e., part (a) holds for (b); parts (a), (b) hold for (c) and so on.

(a)
>>> import welcome
(b)
>>> welcome.greet('Parth')
>>> print(welcome.msg)
(c)
>>> welcome.__doc___
>>> welcome.__name__
(d)
>>> help (welcome)
(e)
>>> import welcome as wel
>>> wel.greet('Radha')

Q2. Create a module conversion.py that should contain the following :-

Constant K = 273.15 # 0
degree C = 273.15 Kelvin

Two conversion functions:

function Cels_to_Fahr(tmp)

That converts given temperature in Celsius to temperature in Fahrenheit using formula:

°F = (9°F/5 °C)°C + 32 °F

and function Fahr_to_Cels(tmp)

That converts given temperature in Fahrenheit to temperature in Celsius using formula:
°C = (5 °C/9 °F) (°F - 32 °F)

Add proper docstring to the module.
(a) Code for conversion.py
(b) help(conversion) # give its output below as per your code of conversion.py

P.I.P :- 4.2

Q1. Area of an equilateral triangle can be computed as √3/4 a2 where a is its side. Write a program to obtain side from user and print the area of equilateral triangle with side a.

Q2. Area of regular polygon can be computed as :

½ n sin (360 / n ) s2 

Where n = number of sides and s = length from center to a corner.

Write a program to obtain values n and s from user and print area of polygon.

Q3. (a) In Python shell, type the following:
import math
Now type the following statements one by one and look what happens:
(i) math.sqrt(49)
(ii) sqrt(49)
(iii) math.fabs(-3)
(iv) fabs (-3)

(b) Now quit the Python shell. Again, restart Python IDLE shell and type
from math import *
Type the same set of statements given in part (a) i.e., (i) to (iv). Log what happens

Q4. Write a program to randomly generate a number from the range 100-1000 both inclusive and print the generated number as :-

Randomly selected lucky viewer is : < number >

P.I.P :- 4.3

Q1. Mark created following directory structure for his module namely chk:

chk
|
|__work.py
|__test
        |__newwork.py

He has copied the folder's link to site-packages folder of Python but still the following command is giving error:

>>> import chk
Traceback (most recent call last):
  File "<pyshell#0>", line 1, in <module>
    import chk
ModuleNotFoundError: No module named 'chk'
>>>

(a) What is the possible reason of above error?
(b) Rectify above problem.
(c) After rectifying, write command to import work module of above shown chk package
(d) After rectifying, write command to import newwork module of above shown chk package

Q2. Create a package as per following:

mailsys/
|--__init__.py
|-- deliver.py #contains function send mail(), get_mail(), draft(), outbox(), inbox()
|__archive
         |--__init__.py
         |--Oldmail.py # contains functions fiveyr(), starred()

After creation, this should be importable in a program with import statement. It should also have proper docstring so that help() function gives proper information about it.

(a) Complete code of delivery.py (make assumptions)
(b) Complete code of oldmail.py (make assumptions)
(c) Write command to display details of module delivery
(d) Write command to import get_mail() function
(e) Write command to import these modules: deliver and oldmail
(f) Write command to run draft() function
(g) Write command to run fiveyr() function