Python 25 Tuple programming interview questions and answers

Interview Question

In this post, we are going to explored most asked python Python 25 Tuple programming interview questions and answers

1. How to Sort List Of Tuples By The First Element

Using Sort() function

lang_listtuple= [('C#',1), ('Go',7), ('Basic',8), ('Python',60)]
 
print('original list of tuples =\n',lang_listtuple)
 
 
lang_listtuple.sort()
 
print('after sorting =\n',lang_listtuple)

Output

original list of tuples =
 [('C#', 1), ('Go', 7), ('Basic', 8), ('Python', 60)]
 
after sorting =
 [('Basic', 8), ('C#', 1), ('Go', 7), ('Python', 60)]

2. How to Sort List Of Tuples By Second Element

lang_listtuple= [('C#',1), ('Go',7), ('Basic',8), ('Python',60)]
 
print('original list of tuples =\n',lang_listtuple)
 
 
 
lang_listtuple.sort(key = lambda item:item[1])
 
  print('after sorting by second item=\n',lang_listtuple)

Output

the original list of tuples =
 [('C#', 1), ('Go', 7), ('Basic', 8), ('Python', 60)]
 
after sorting by the second item =
 [('C#', 1), ('Go', 7), ('Basic', 8), ('Python', 60)]

3. How to remove duplicate from list of tuples

Using List comprehension

#a list of tuples
list_of_tuples= [("C#", 1), ("C#", 1), ("C++", 3), 
     ("C++", 3), ("Python", 25), ("Rust", 30)]
 
#removing the duplicate
unique_list_of_tuples=list(set([item for item  in list_of_tuples]))
 
print('list of tuple after removing duplicate=\n', unique_list_of_tuples)

Output

array one is linear [1 2 3 4]

4. How to remove duplicate from list of tuples using dict() function

listofTuples = [("C#" , 2), ("JS" , 3), ("C#" , 2),("GO" , 23),("Java" , 77)]

dictiwithlistof_tuples = dict(listofTuples)
print(dictiwithlistof_tuples)

Output

{'C#': 2, 'JS': 3, 'GO': 23, 'Java': 77}

5. How do we reverse a string in Python?

String = "String Example" [::-1]
print(String)

Output

elpmaxE gnirtS

6. Example to convert list to tuple.

listelements = ['C#', 'Java', 'Go', 'Rust']
tuple = tuple(listelements)
print(tuple)

#Output:
('C#', 'Java', 'Go', 'Rust')

7. How to convert two list to dictionary in Python?

Subj = ["Math", "English", "computer", "Music"]
marks = [98, 90, 75, 100]

student_score = dict(zip(Subj, marks))
print(student_score)

#Output:{'Math': 98, 'English': 90, 'computer': 75, 'Music': 100}

8. How To Filter A List of Given Elements In a List Of Tuples?

Using lambda and list

listoftuple = [(1,2,'C#'),('Pyth',4),('Pyth',5,6),(7,8,),('Pyth',6)]
item = 'Pyth'
output = list(filter(lambda x:item in x, listoftuple))
#filltering the list of tuple
print('fliterring list of tuples =\n',output)

Output

fliterring list of tuples =
 [('Pyth', 4), ('Pyth', 5, 6), ('Pyth', 6)]

9. Different Ways To Concatenate Tuples In Python.

Sum() : To concatenate tuples into single/nested Tuples

Example :Sum() to concatenate tuples into a single tuple

tupleint= (1,2,3,4,5,6)
langtuple = ('C#','C++','Python','Go')
#concatenate the tuple
tuples_concatenate = sum((tupleint, langtuple), ())
print('concatenate of tuples \n  =',tuples_concatenate)

Output

concatenate of tuples
  = (1, 2, 3, 4, 5, 6, 'C#', 'C++', 'Python', 'Go')

Sum() to concatenate tuple into a nested tuple

Now let us understand how we can sum tuples to make a nested tuple.In this program we will use two tuples which are nested tuples, please note the ‘,’ at the end of each tuples tupleint and langtuple.

tupleint= (1,2,3,4,5,6),
langtuple = ('C#','C++','Python','Go'),
#concatenate the tuple
tuples_concatenate = sum((tupleint, langtuple), ())
print('concatenate of tuples \n  =',tuples_concatenate)

Output

concatenate of tuples
  = ((1, 2, 3, 4, 5, 6), ('C#', 'C++', 'Python', 'Go'))

10. Write a program to create mixed datatype tuple in Python

Langtuple = (1, "C#", 3.4,'C++',False,True)

print('mixed type tuple=',Langtuple)

Output

mixed type tuple= (1, 'C#', 3.4, 'C++', False, True)

11. What will be the output of tuple slicing program .

Langtuple = (1, "C#", 3.4,'C++',False,True)


print( Langtuple[::5])
print( Langtuple[::2])
print( Langtuple[:-3])

Output

(1, True)
(1, 3.4, False)
(1, 'C#', 3.4)

12. How to replace the last tuple value from list of tuples.

listoftuple = [(1, "C#",40), (3.4,'C++',False),(True,0,56)]


print([tuple[:-1] + (45,) for tuple in listoftuple])

Output

[(1, 'C#', 45), (3.4, 'C++', 45), (True, 0, 45)]

13. How to remove empty tuple from list of tuples.

listoftuple = [(1, "C#",40),(),('',),(3.4,'C++',False),(True,0,56),()]


print([tuple for tuple in listoftuple if tuple])

Output

[(1, 'C#', 40), ('',), (3.4, 'C++', False), (True, 0, 56)]

14. How to convert list of tuple to dictionary

#defining an  empty dictionary

lang_dictionary = {}

lang_tuples= [("C#", 1), ("C", 2), ("C++", 3), ("Go", 20), ("Python", 25), ("Rust", 30)]

 
for lang,value in lang_tuples:

  #list of tuples to dictionary

 lang_dictionary.setdefault(lang, []).append(value)

print('list of tuples to dictionary=\n', lang_dictionary)

Output

list of tuples to dictionary=
 {'C#': [1], 'C': [2], 'C++': [3], 'Go': [20], 'Python': [25], 'Rust': [30]}

15.How to sort the tuple by float value from list of tuples in ascending order.

listoftuple = [('C#', '10.20'), ('Go', '13.06'),('F#','10.05'), ('Python', '15.5')]
print( sorted(listoftuple, key=lambda ele: float(ele[1])))

Output

[('F#', '10.05'), ('C#', '10.20'), ('Go', '13.06'), ('Python', '15.5')]

16. Write code to unzip a list of tuple in separate lists

listoftuple = [('C#', '10.20'), ('Go', '13.06'),('F#','10.05'), ('Python', '15.5')]

print(list(zip(*listoftuple))) 

Output

[('C#', 'Go', 'F#', 'Python'), ('10.20', '13.06', '10.05', '15.5')]

17. How to find a Tuple element by value in Python

tuple = ('C#', 10, 'Go', '13.06','F#','10.05','Python', '15.5')
item =10;

if item in tuple:
    print("Element  in Tuple")
else:
    print("Element not  in Tuple")  

Output

Element  in Tuple

18. Code to find the positive elements tuple from the list of Tuples

list_of_tuples = [(12, 3, 10), (-15, 6, 9), (-7, 2, 7)] 
  

  
# all() method to check each item of listoftuples
res = [pos for pos in list_of_tuples if all(item >= 0 for item in pos)] 
  
# result
print("Tuples contain positive items : " ,res) 

Output

Tuples contain positive items :  [(12, 3, 10)]

19.How To Do The Position Sum Of Python Tuple Elements?

numtuple = (5, 6, 7)
inttuples  = (8, 9, 10,11)
   
# printing both tuples
print('num tuple =', numtuple)
print("langtuple : ",inttuples)
   
# tuple  using map()  and lambda
added_tuples = tuple(map(lambda num, num1: num + num1, numtuple, inttuples))  
print("tuples addition using map and lambda =" ,added_tuples)


Output

num tuple = (5, 6, 7)
langtuple :  (8, 9, 10, 11)
tuples addition using map and lambda = (13, 15, 17)

20.How to find a tuple that has all elements divide by any number from a list of tuples.

list_of_tuples = [(12, 8, 16), (24, 16, 28), (7, 2, 7)] 
  
number = 4
  
# all() method to check each item of listoftuples
res = [div for div in list_of_tuples if all(item%number == 0 for item in div)] 

print("Tuple which all items divide by number 4 = : ",res) 

Output

Tuple which all items divide by number 4 = :  [(12, 8, 16), (24, 16, 28)]

21.How to Convert Tuple to string.

str_tuple = ('This', 'is', 'tuple', 'to', 'string')
tuple_to_string =  ''.join(str_tuple)
print(tuple_to_string)

Output

Thisistupletostring

22. Program to remove duplicate from List of Tuples

lst_of_tuple= [('C#', 1), ('JS', 2), ('C#', 1), ('JS', 2),('React',1)] 
      
result = [tup for tup in (set(tuple(ele) for ele in lst_of_tuple))] 
          


print(result)

Output

[('C#', 1), ('JS', 2), ('React', 1)]

23.How to find the Duplicate tuple in list of tuple

lst_of_tuple= [('C#', 1), ('JS', 2), ('C#', 1), ('JS', 2),('React',1)] 
      
#finding the duplicate tuple
result_tuple = list(set([item for item in lst_of_tuple 
            if lst_of_tuple.count(item) > 1])) 
print(result_tuple)

Output

[('C#', 1), ('JS', 2)]

24. How to get the max value tuple from List of Tuple.

from operator import itemgetter 
lst_of_tuple= [('C#', 100), ('JS', 200),('React',400)] 
      
#fmax value tuple key
result_tuple = max(lst_of_tuple, key = itemgetter(1))[0] 
print(result_tuple)

Output

React

25. How to get min and max key-value pair from the list of Tuples.

lst_of_tuple= [('C#', 100), ('JS', 200),('React',400)] 
      
#key - value with max ,min value
max_key_value =  max(lst_of_tuple)[0], max(lst_of_tuple)[1] 
min_key_value = min(lst_of_tuple)[0],min(lst_of_tuple)[1]
print(max_key_value,min_key_value)

Output

('React', 400) ('C#', 100)

26.Program to generate random number in Python

import random
#Generate random number between 0and 9
print(random.randint(0,9))

#Output: 4

choice() function

import random 
  
# choice() function to generate function from list
print ("Generate number num from list : ") 
print (random.choice([1, 4, 8, 10, 3])) 

#Output :Generate number num from list : 
4