t35.py

t=('red','blue','green','red','yellow')
#Returns the index of first occurence of 'red'
print (t.index('red')) #Output: 0
print (t.index('blue'))#Output:1
#If element is not in tuple means raise an ValueError.
#print (t.index('yellow'))#Output:ValueError: tuple.index(x): x not in tuple

#search the element 'blue' from second index
#print (t.index('blue',2))
#Output:ValueError: tuple.index(x): x not in tuple

#will search the element 'yellow' from index 1 till index 3
print (t.index('yellow',1,3))
#Output:ValueError: tuple.index(x): x not in tuple