python - Trying to make this diamond shape using for loops:

Question

I am trying to make a diamond shape using loops in python. This is my code so far:

facesize=10
radius=5

for line in range(facesize):
    rightshift= ""
    for shift in range(5):
        rightshift= " "
        print(rightshift)
    print("-")

Please help on how I can fix this. I am trying to make something like this:

            -
          -   -
        -       -
      -           -
    -               -  
      -           -
        -       -
          -   -
            -

question from:https://stackoverflow.com/questions/65648990/trying-to-make-this-diamond-shape-using-for-loops

Answer 1

You can think of it as an horizontal mirror of a string with a "-" at positions going from last to first and back to last:

side = 6
for position in range(1-side,side): # last to first, and back (abs value)
    A = [" "]*side                  # left half
    A[abs(position)] = "-"          # set "-" at position
    A += A[-2::-1]                  # mirror for right side
    print(*A)

    
          -          
        -   -        
      -       -      
    -           -    
  -               -  
-                   -
  -               -  
    -           -    
      -       -      
        -   -        
          -