input: Write a python function to generate a random password of length 8 containing uppercase, lowercase letters, digits, and symbols.
  assert len(generate_password()) == 8
  assert any(c.islower() for c in generate_password())
  assert any(c.isupper() for c in generate_password())
  assert any(c.isdigit() for c in generate_password())
  assert any(c in string.punctuation for c in generate_password())
output: import random
  import string
  
  def generate_password():
      characters = string.ascii_letters + string.digits + string.punctuation
      while True:
          password = ''.join(random.choice(characters) for _ in range(8))
          if (any(c.islower() for c in password) and 
              any(c.isupper() for c in password) and 
              any(c.isdigit() for c in password) and 
              any(c in string.punctuation for c in password)):
              return password