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66 lines
1.9 KiB
Python
66 lines
1.9 KiB
Python
"""
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This is a pure Python implementation of Dynamic Programming solution to the fibonacci
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sequence problem.
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"""
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class Fibonacci:
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def __init__(self, N=None):
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self.fib_array = []
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if N:
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N = int(N)
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self.fib_array.append(0)
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self.fib_array.append(1)
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for i in range(2, N + 1):
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self.fib_array.append(self.fib_array[i - 1] + self.fib_array[i - 2])
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elif N == 0:
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self.fib_array.append(0)
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print(self.fib_array)
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def get(self, sequence_no=None):
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"""
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>>> Fibonacci(5).get(3)
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[0, 1, 1, 2, 3, 5]
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[0, 1, 1, 2]
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>>> Fibonacci(5).get(6)
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[0, 1, 1, 2, 3, 5]
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Out of bound.
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>>> Fibonacci(5).get(-1)
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[0, 1, 1, 2, 3, 5]
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[]
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"""
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if sequence_no is not None:
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if sequence_no < len(self.fib_array):
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return print(self.fib_array[: sequence_no + 1])
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else:
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print("Out of bound.")
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else:
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print("Please specify a value")
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if __name__ == "__main__":
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print("\n********* Fibonacci Series Using Dynamic Programming ************\n")
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print("\n Enter the upper limit for the fibonacci sequence: ", end="")
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try:
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N = int(input().strip())
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fib = Fibonacci(N)
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print(
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"\n********* Enter different values to get the corresponding fibonacci "
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"sequence, enter any negative number to exit. ************\n"
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)
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while True:
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try:
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i = int(input("Enter value: ").strip())
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if i < 0:
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print("\n********* Good Bye!! ************\n")
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break
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fib.get(i)
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except NameError:
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print("\nInvalid input, please try again.")
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except NameError:
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print("\n********* Invalid input, good bye!! ************\n")
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import doctest
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doctest.testmod()
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