Adel Moustafa :
I am new to python and I want to build a function that updates part of a list according to a condition.
here is an example of what I want:
List1=[1,2,3,4,10,5,9,3,4]
List2=[2,4,6,8]
I want to update List1 to be [2,4,6,8,10,5,9,6,8], and here is my code to do that:
x = [1, 2, 3, 4, 10, 5, 9, 3, 4]
y = [2, 4, 6, 8]
def update_signal(gain):
for i in range(0, len(y)):
for j in range(0, len(x)):
if x[j] == y[i] / gain:
x[j] = y[i]
elif x[j - 1] == y[i] / gain:
break
update_signal(2) # for this example only gain =2
print("x=", x)
print("y=", y)
the expected output is:
x=[2,4,6,8,10,5,9,6,8]
y=[2,4,6,8]
what it actually prints is:
x= [8, 8, 6, 8, 10, 5, 9, 6, 8]
y= [2, 4, 6, 8]
so, what am I doing wrong to make this function behave like this?
Alexander Lekontsev :
Maybe something like this?
def update_signal(gain):
return [item * gain if item * gain in y else item for item in x]
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