How to use the last returned value by a function, as an input for the same function in a loop. Python

Question

I have a problem using the last returned value from a function, as an input for the same function, I don´t know if it is possible to do.

For example, I have the following function:

def sample (x):
    p=1+x
    return p 
sample(h)

and I want to use the last returned value "p" as the new data for h in a loop, the new function will look like:

def sample (x):
    p=1+x
    return p 
sample(h)

for i in range (0,5):  
    h=sample(h)

The code works for iteration 1 and 2, but don´t update the values for iterations 3,4,5. Variable "p" in my real code, takes values from other functions or databases and changes (it´s a 3d array too), so it changes with each iteration. First input data "h" comes from a previous function too.

The input and output will be like:

h= [[[1.71, 1.8,  1.32, 1.56, 2.81],   [1.,   2.,   1.,   2.,   1.]],
    [[1.44, 1.47, 1.5,  1.02, 2.51],   [1.,   2.,   1.,   2.,   1.]]]


p= [[[1.62, 1.15, 1.1,  1.05, 2.28],   [1.,   2.,   1.,   2.,   1.]],
    [[1.97, 1.85, 1.88, 1.03, 1.87],   [1.,   2.,   1.,   2.,   2.]]]

Asked By: Hernan19

||

Source

Answer 1

last_value = None
def sample (x):
    p=1+x
    last_value = p
    return p 
sample(last_value)

for i in range (0,5):  
    h=sample(last_value )

Answered By: Dean Van Greunen

Answer 2

It is a bit difficult to grasp from your description, but I believe this might give you the desired result:

def sample(x):
    p = 1+x
    return p


h = 1  # Set the initial value here
for i in range(0, 5):
    newH = sample(h)
    h = newH
    print(h) # Remove this print statement if you do not wish the result printed

Answered By: user15262913

How to use the last returned value by a function, as an input for the same function in a loop. Python

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