input: Write a function to calculate the square root of a given positive number. If the number is negative, return -1. Otherwise, return the square root of the number.
  assert calculate_square_root_positive(100)==10.0
  assert calculate_square_root_positive(25)==5.0
  assert calculate_square_root_positive(0)==0.0
  assert calculate_square_root_positive(-1)==-1
  assert calculate_square_root_positive(4)==2.0
output: def calculate_square_root_positive(number):
      if number < 0:
          return -1
      return number ** 0.5