Python: Create Fibonacci series upto n using Lambda
Python Lambda: Exercise-10 with Solution
Write a Python program to create Fibonacci series upto n using Lambda.
Sample Solution:
Python Code :
from functools import reduce
fib_series = lambda n: reduce(lambda x, _: x+[x[-1]+x[-2]],
range(n-2), [0, 1])
print("Fibonacci series upto 2:")
print(fib_series(2))
print("\nFibonacci series upto 5:")
print(fib_series(5))
print("\nFibonacci series upto 6:")
print(fib_series(6))
print("\nFibonacci series upto 9:")
print(fib_series(9))
Sample Output:
Fibonacci series upto 2: [0, 1] Fibonacci series upto 5: [0, 1, 1, 2, 3] Fibonacci series upto 6: [0, 1, 1, 2, 3, 5] Fibonacci series upto 9: [0, 1, 1, 2, 3, 5, 8, 13, 21]
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Previous: Write a Python program to check whether a given string is number or not using Lambda.
Next: Write a Python program to find intersection of two given arrays using Lambda.
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Python: Tips of the Day
Python: Cache results with decorators
There is a great way to cache functions with decorators in Python. Caching will help save time and precious resources when there is an expensive function at hand.
Implementation is easy, just import lru_cache from functools library and decorate your function using @lru_cache.
from functools import lru_cache @lru_cache(maxsize=None) def fibo(a): if a <= 1: return a else: return fibo(a-1) + fibo(a-2) for i in range(20): print(fibo(i), end="|") print("\n\n", fibo.cache_info())
Output:
0|1|1|2|3|5|8|13|21|34|55|89|144|233|377|610|987|1597|2584|4181| CacheInfo(hits=36, misses=20, maxsize=None, currsize=20)
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