im trying to add the value of each element in a list to all previous values without using numpy of any other library.
the list (dis) represent the length of elements which i need to calculate their positions if i want to place them and have 100 mm distance between each of them.
the first element i want it to be placed at 0
i have tried the following:
dis = [40,400,20,100,400]
betweenDistance = 100
_dis = []
total = 0
for e,x in enumerate(dis):
if e == 0:
_dis.append(0)
elif e < (len(dis)-1):
_dis.append( total + ((dis[e-1])/2) + betweenDistance + (x/2) )
total+=(sum(_dis[0:e]))
else:
_dis.append((x/2)+betweenDistance+total)
OUT = _dis
what i need to have in the end is the following:
0, 320, 630, 790, 1140
>Solution :
Try defining a helper function with a for loop:
def calculate_positions(elements: list[int], gap_distance: int) -> list[int]:
"""Calculate element positions based on their lengths and a set gap distance."""
positions = [0]
for i in range(1, len(elements)):
prev_position = positions[-1]
prev_element_length = elements[i - 1]
current_element_length = elements[i]
new_position = int(prev_position + (prev_element_length / 2) +
gap_distance + (current_element_length / 2))
positions.append(new_position)
return positions
print(f'{calculate_positions(elements=[40, 400, 20, 100, 400], gap_distance=100) = }')
Output:
calculate_positions(elements=[40, 400, 20, 100, 400], gap_distance=100) = [0, 320, 630, 790, 1140]