





from __future__ import annotations
def 					_A	(		SCREAMING_SNAKE_CASE					:       float	,	SCREAMING_SNAKE_CASE					:       float	,	SCREAMING_SNAKE_CASE					:       float	,	):





  """simple docstring"""



  if (electron_conc, hole_conc, intrinsic_conc).count(0						) != 1:
    raise ValueError("You cannot supply more or less than 2 values"						)
  elif electron_conc < 0:
    raise ValueError("Electron concentration cannot be negative in a semiconductor"						)
  elif hole_conc < 0:
    raise ValueError("Hole concentration cannot be negative in a semiconductor"						)
  elif intrinsic_conc < 0:
    raise ValueError(
        "Intrinsic concentration cannot be negative in a semiconductor"						)
  elif electron_conc == 0:
    return (
        "electron_conc",
        intrinsic_conc**2 / hole_conc,
    )
  elif hole_conc == 0:
    return (
        "hole_conc",
        intrinsic_conc**2 / electron_conc,
    )
  elif intrinsic_conc == 0:
    return (
        "intrinsic_conc",
        (electron_conc * hole_conc) ** 0.5,
    )
  else:
    return (-1, -1)


if __name__ == "__main__":
     import doctest

     doctest.testmod()













def 					_A	(		SCREAMING_SNAKE_CASE					:       float	,	SCREAMING_SNAKE_CASE					:       float						):





  """simple docstring"""



  return price * (1 + tax_rate)


if __name__ == "__main__":
     print(F"""{price_plus_tax(100, 0.2_5) = }""")
     print(F"""{price_plus_tax(1_2_5.5_0, 0.0_5) = }""")






