pep style and fixed exception on input other and integer type

Author: akshaysharma096

dynamic_programming/fibonacci.py

@@ -1,16 +1,18 @@
 """
 This is a pure Python implementation of Dynamic Programming solution to the fibonacci sequence problem.
 """
-classFibonacci:
 
+
+classFibonacci:
 def__init__(self, N=None):
 ifN:
+N=int(N)
 self.fib_array= [0] * (N+1)
 self.fib_array[0] =0
 self.fib_array[1] =1
 foriinrange(2, N+1):
 self.fib_array[i] =self.fib_array[
-i-1] +self.fib_array[i-2]
+i-1] +self.fib_array[i-2]
 else:
 self.fib_array= [None] * (N+1)
 
@@ -43,12 +45,13 @@ def get(self, sequence_no=None):
 "\n********* Enter different values to get the corresponding fibonacci sequence, enter any negative number to exit. ************\n")
 whileTrue:
 print("Enter value: ", end=" ")
-i=eval(input())
-ifi<0:
-print("\n********* Good Bye!! ************\n")
-break
-fib.get(i)
-exceptNameError:
-print("\nInvalid input, please try again.")
+try:
+i=eval(input())
+ifi<0:
+print("\n********* Good Bye!! ************\n")
+break
+fib.get(i)
+exceptNameError:
+print("\nInvalid input, please try again.")
 exceptNameError:
 print("\n********* Invalid input, good bye!! ************\n")