Python Tuples

In this post we will cover Tuples in Python. You can watch our videos on Tuples in Python – Click Here

Q.1 What is Tuple in python? Also give an example.
Ans.

• Tuples are a collection of data items. They may be of different types.
• Tuples are immutable like strings. Lists are like tuples but are mutable.
• e.g.  T= (“Tony”, “Pat”, “Stewart”)
  (‘Tony’, ‘Pat’, ‘Stewart’)
• Python uses () to denote tuples; we could also use (), but if we have only one item, we need to use a comma to indicate it’s a tuple: (“Tony”,).
• An empty tuple is denoted by ()‏

Q. 2 How to create a python Tuple?
Ans.

• To create a new Python Tuple, you can either assign empty round brackets T=( )
• You can also assign any values directly inside round brackets separated by comma.
  T= T = ( val1, val2,val3, val4….)
• You can also create tuple as user input
  • L = tuple (input (“Enter tuple”))
  • L = eval (input (“Enter tuple”))
• Do note that indexing of tuple is just similar to indexing of list.

Q.3 How to accessing values from tuples?
Ans. To Accessing Values from Tuples

• Use the square brackets for slicing along with the index
• or indices to obtain the value available at that index.
• e.g.
       tup1 = (“comp sc”, “info practices”, 2020, 2021)
       tup2 = (5,8,20,4,9,56)
       print (“tup1[0]: “, tup1[0])
       print (“tup2[1:5]: “, tup2[1:5])

Q. 4 How to update Tuples?
Ans. To updating Tuples:

• Tuples are immutable so we can’t change the content of tuple.
• It’s alternate way is to take contents of existing tuple and create another tuple with these contents as well as new content. Or convert to list and then back.
• E.g.
      tup1 = (1, 2)
      tup2 = (‘a’, ‘b’)
      tup3 = tup1 + tup2
      print (tup3)

Q.5 How we can delete tuple elements?
Ans.

• Direct deletion of tuple element is not possible but shifting of required content after discard of unwanted content to another tuple.
• Entire tuple can be deleted using del statement. e.g. del tup1
• E.g.
  tup1 = (1, 2,3)
  tup3 = tup1[0:1] + tup1[2:]
  print (tup3)
• Output
         (1, 3)

Q. 6 What is tuple slicing?
Ans. Slice operator works on Tuple also.

• It is used to display more than one selected value on the output screen.
• Slices are treated as boundaries and the result will contain all the elements between boundaries.
• Syntax: Seq = T [start: stop: step]
• Where start, stop & step – all three are optional. If we omit first index, slice starts from ‘0’. On omitting stop, slice will take it to end. Default value of step is 1.

Q. 7 What is differentiate between tuple and list?
Ans. 

Q. 8 Write any 2 tuple functions and method with description.
Ans.

Method:

• count(): Returns the number of times a specified value occurs in a tuple
• index(): Searches the tuple for a specified value and returns the position of where it was found

Q. 9 Write a Python program to test if a variable is a list or tuple or a set.
Ans.

#x = ['a', 'b', 'c', 'd']
#x = {'a', 'b', 'c', 'd'}
x = ('tuple', False, 3.2, 1)
if type(x) is list:
   print('x is a list')
elif type(x) is set:
   print('x is a set')
elif type(x) is tuple:
   print('x is a tuple')
else:
   print('Neither a list or a set or a tuple.')

Q.10 Write a Python program to sort a list of tuples by the second Item.
Ans.

def Sort_Tuple(tup):
  lst = len(tup)
  for i in range(0, lst):
    for j in range(0, lst-i-1):
      if (tup[j][1] > tup[j + 1][1]):
        temp = tup[j]
        tup[j]= tup[j + 1]
        tup[j + 1]= temp
  return tup
tup =[('for', 2), ('is', 9), ('to', 7),('Go', 5), ('or', 15), ('a', 13)]
print(Sort_Tuple(tup))

Q.11 Write a Python program which accepts a sequence of comma-separated numbers from user and generate a list and a tuple with those numbers.
Ans.

values = input("Input some comma separated numbers : ")
list = values.split(",")
tuple = tuple(list)
print('List : ',list)
print('Tuple : ',tuple)

Q. 12 Write a python program to print sum of tuple elements.
Ans.

test_tup = (7, 5, 9, 1, 10, 3)
print("The original tuple is : " + str(test_tup))
res = sum(list(test_tup))
# printing result
print("The sum of all tuple elements are : " + str(res))

Q. 13 Write a Python program to sort a list of tuples alphabetically
Ans.

def SortTuple(tup):
  n = len(tup)
  for i in range(n):
    for j in range(n-i-1):
      if tup[j][0] > tup[j + 1][0]:
        tup[j], tup[j + 1] = tup[j + 1], tup[j]
  return tup
tup = [("Amaruta", 20), ("Zoe", 32), ("Akshay", 25),("Nilesh", 21), ("C", "D"), ("Penny", 22)]
print(SortTuple(tup))

Q. 14 Write a python program to Check if the given element is present in tuple or not.
Ans.

test_tup = (10, 4, 5, 6, 8)
# printing original tuple
print("The original tuple : " + str(test_tup))
N = int(input("value to be checked:"))
res = False
for ele in test_tup :
  if N == ele :
    res = True
    break
print("Does contain required value ? : " + str(res))