Python Programs using different data frames like list, tuple, set and dictionary

Ex. 2

Write a python program to create a list of even numbers from 0 to 10.

Solution :

even = [] #creating empty list

for i in range(11):

    if i%2= = 0:

        even.append(i)

print("Even Numbers List: ",even)

    even = [] #creating empty list

for i in range(11):

    if i%2= = 0:

        even.append(i)

print("Even Numbers List: ",even)

Output

Even Numbers List: [0, 2, 4, 6, 8, 10]

Program explanation: In above program,

1) We have created an empty list first.

2) Then using the range of numbers from 0 to 11 we append the empty list with even numbers. The even number is test using the if condition. i.e. if I %2==0. If so then that even number is appended in the list.

3) Finally the comprehended list will be displayed using print statement.

Ex. 3

Write a python program to combine and print two lists using list comprehension.

Solution :

print([(x,y)for x in['a','b'] for y in ['b','d'] if x!=y])

Output

[('a', 'b'), ('a', 'd'), ('b', 'd')]

Ex. 4

To accept N numbers from user. Compute and display maximum in list, minimum in list, sum and average of numbers.

Solution :

mylist = [] # start an empty list

print("Enter the value of N: ")

N = int(input()) # read number of element in the list

for i in range(N):

    print("Enter the element: ")

    new_element = int(input()) # read next element

    mylist.append(new_element) # add it to the list

print("The list is: ")

print(mylist)

print("The maximum element from list is: ")

max_element=mylist[0]

for i in range(N): #iterating throu list

    if(mylist[i]>max_element):

        max_element=mylist [i] #finding the maximum element

print(max_element)#printing the maximum element

print("The minimum element from list is: ")

min_element=mylist[0]

for i in range(N): #iterating throu list

    if(mylist[i]<min_element):

        min_element=mylist [i] #finding the minimum element

print(min_element)#printing the minimum element

print("The sum of all the numbers in the list is: ")

sum=0

for i in range(N): #iterating throu list

    sum sum+mylist[i] # finding the sum

print(sum)

avg=sum/N # computing the average

print("The Average of all the numbers in the list is: ",avg)

Output

Enter the value of N:

5

Enter the element:

33

Enter the element:

22

Enter the element:

55

Enter the element:

11

Enter the element:

44

The list is:

[33, 22, 55, 11, 44]

The maximum element from list is:

55

The minimum element from list is:

11

The sum of all the numbers in the list is:

165

The Average of all the numbers in the list is: 33.0

>>> 

Tuple - Python Programs using data frame

The element in Tuple can be accessed using the index.

Ex. 5

For example ‒

>>> t1=(10,20,'AAA', 'BBB')

>>> print(t1[0])

    10

>>> print(t1[1:3])

     (20, 'AAA')

>>> 

 len:

>>> t1=(10,20,30,40)

>>> print(len(t1))

4

>>> 

Concatenation

>>> t1=(10,20,30)

>>>t2=(40,50,60)

>>> print(t1+t2)

(10, 20, 30, 40, 50, 60)

>>> 

Repetition

>>> t1=(10,20,30)

>>> print(t1*3)

(10, 20, 30, 10, 20, 30, 10, 20, 30)

>>> 

Membership

>>> t1=(10,20,30,40,50)

>>> print(3 in t1)

False

>>> print(30 in t1)

True

>>> 

Iteration

In [16]:

 t1 = (10,20,30,40,50)

for i in t1:

      print(i)

10

20

30

40

50

Ex. 6

Built in Tuple Function

>>>t1=(10,20)

>>>t2=(10,20,30)

>>>print(cmp(t1, t2)

>>>‒1

In [17]:

t1=(10,20,30)

print(len(t1))

3

In [18]:

print(max(t1))

30

In [19]:

print(min(t1))

10

For example

>>> t1=tuple()

>>> print(t1)

( )

>>> 

Another example

>>> t1=tuple("hello")

>>> print(t1)

('h', 'e', '1', '1', 'o')

>>>