Question

Python 3

8. write a function modify_tuple that changes element n of a tuple t to a new value x and returns the new tuple. Hint: tuples aren't mutable. You need to construct a new one! # fill in details def modify_tuple (t , i, x): In modify_tuple( (1,2,3), 1, 'foo') # should return (1, 'yo!', 3) In

# fill in details ...
def modify_tuple(t, i, x):

modify_tuple((1,2,3), 1, 'foo') # should return (1, 'yo!', 3)

Answer 1

Python code :

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def modify_tuple(t , i , x) : # function to change value of ith element of tuple to x
   tmp_tuple = list(t)    # declare a temporaty tuple and assign t to it
   tmp_tuple[i] = x       # change value at ith index of tmp_tuple
   t = tuple(tmp_tuple)   # assign tmp_tuple to t
   return t               # return the tuple t
  

t = ('1', '2', '3')       # input example
myTuple = modify_tuple(t , 1 , 'foo' )
print(myTuple)

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Explanation : As per question requirement a function modify_tuple() is declared which takes three arguments : a tuple(t) , and index(i) and a value(x) and finally changes the value of element at ith index to x.Since tuples are immutable(not mutable),you cannot directly change its value.To change the value at ith index , I've used a list tmp_tuple and assigned t to it using typecasting.After changing the value I've assigned tmp_tuple to t by type casting it to a tuple and finally returned the modified tuple.

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Code screenshot :

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Output :

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Please comment in case you have any doubt or anything is unclear in code/explanation.