main.py

UP=3
LEFT=2
DOWN=1
RIGHT=0


DIRS = [(0,1),(1,0),(0,-1),(-1,0)]

def spiral_copy(inputMatrix):
  n=len(inputMatrix)
  m=len(inputMatrix[0])
  curr_dir=RIGHT
  r=0
  c=0
  result=[]
  for i in range(m*n):
    print(r,c)
    print(inputMatrix[r][c])
    result.append(inputMatrix[r][c])
    inputMatrix[r][c]=None
    new_r = r + DIRS[curr_dir][0]
    new_c = c + DIRS[curr_dir][1]

    
    not_valid=not ((0 <= new_r <m and 0<= new_c<n) and (inputMatrix[new_r][new_c] is None))

    if not_valid:
      curr_dir=(curr_dir+1)%4
      new_r = r+DIRS[curr_dir][0]
      new_c = c+DIRS[curr_dir][1]
      is_visited=(inputMatrix[new_r][new_c] is None)
    
    print(curr_dir,'---')
    r=new_r
    c=new_c
  print(inputMatrix)    
  return result
      
      
    
print(spiral_copy([ [1,    2,   3,  4,    5],
                         [6,    7,   8,  9,   10],
                         [11,  12,  13,  14,  15],
                         [16,  17,  18,  19,  20] ]))