Resolved: question 7 fibonacci series
i tried this code for the fibonacci series:
fibonacci =[0, 1]
length = int(input('enter the length of the series '))
for i in range(0,length-2):
number = fibonacci[i] + fibonacci[i+1]
fibonacci = fibonacci.append(number)
print(fibonacci)
and it doesn't work. this error pops out
TypeError: 'NoneType' object is not subscriptable
Can anyone tell me please :
-what does it mean ?
-how to/can we fix it,
Hey Amazigh,
Thank you for your question!
If you substitute the following line of code
fibonacci = fibonacci.append(number)with the following
fibonacci.append(number), i.e., remove fibonacci = , your code will execute smoothly.
The reason for this is that the operation
fibonacci.append(number)returns a NoneType. You can convince yourself of that by executing, for example, the following
type(fibonacci.append(6))You will see that it returns a NoneType. Therefore, your original code assigns NoteType to the fibonacci variable which means fibonacci is no longer a list.
Kind regards,
365 Hristina
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