Solution Exercise 70: Python algorithm that tests whether a list is symmetric or not

Exercise 70

Write a Python algorithm to test if a given list is symmetric using the reverse() method. Example: for L1 = [2, 5, 11, 5, 2] the algorithm returns True and for L2 = [2, 23, 11, 51, 7] the algorithm returns False.

Solution

def symetric (L):
     # create a copy of L
     reverseL = L.copy()
    
     # creation of the list inverse 
     reverseL.reverse()
     if reverseL == L:
          return True
     else:
          return False
   
#Example
L1 = [2, 5, 11, 5, 2]
L2 = [2, 23, 11, 51, 7]

print (symetric (L1)) # display True
print (symetric (L2)) # display False