Tuple Comprehensions

• Tuple Comprehension is not supported by Python. If you try to create we are not getting tuple object and we are getting generator object.

Example

t= ( x**2 for x in range(1,6))
print(type(t))
for x in t:
  print(x)

Output

<class 'generator'>
1
4
9
16
25

Question

Write a program to take a tuple of numbers from the keyboard and print its sum and average

t=eval(input("Enter Tuple of Numbers:"))
l=len(t)
sum=0
for x in t:
  sum=sum+x
print("The Sum=",sum)
print("The Average=",sum/l)

Output

Enter Tuple of Numbers:(10,20,30,40)
The Sum= 100
The Average= 25.0

Tuple Packing and Unpacking

• We can create a tuple by packing a group of variables.

Example

a=10
b=20
c=30
d=40
t=a,b,c,d
print(t)

Output

10,20,30,40)

• Here a,b,c,d are packed into a tuple t. This is nothing but tuple packing.
• Tuple unpacking is the reverse process of tuple packing. We can unpack a tuple and assign its values to different variables.

Example

t=(10,20,30,40)
a,b,c,d=t
print("a=",a,"b=",b,"c=",c,"d=",d)

Output

a= 10 b= 20 c= 30 d= 40

Note

• At the time of tuple unpacking the number of variables and number of values should be same, Otherwise we will get ValueError.

Example

t=(10,20,30,40)
a,b,c=t

Output

 ValueError: too many values to unpack (expected 3)

Differences between List and Tuple

• List and Tuple are exactly same except list objects are mutable where as tuple objects are immutable.
• In both cases insertion order is preserved, duplicate objects are allowed, heterogeneous objects are allowed, index and slicing are supported.

Ungraded Questions

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