input: Write a function to print out the Pascal's triangle for a given number of rows. The function should take an integer `n` as input and print each row of the Pascal's triangle up to the nth row.
  
  def pascal_triangle(n):
      trow = [1]
      y = [0]
      for x in range(max(n, 0)):
          print(trow)
          trow=[l+r for l,r in zip(trow + y, y + trow)]
      return n>=1
  
  assert pascal_triangle(0)==False
  assert pascal_triangle(1)==True
  assert pascal_triangle(5)==True
  assert pascal_triangle(7)==True
output: def pascal_triangle(n):
      trow = [1]
      y = [0]
      for x in range(max(n, 0)):
          print(trow)
          trow=[l+r for l,r in zip(trow + y, y + trow)]
      return n>=1