styles = {
  '.text.highlight':{
    'color': 'black',
    'background': 'blue',
    'font-family': 'Garamond',
    'psudo': {
      ':not(h1)': {
        'font-size': '1.5rem'
      },
      ':hover': {
        'background': 'red'
      }
    },
  },
  '.underline':{
    'text-decoration': 'underline'
  },
  '#main':{
    'color': 'red',
    "psudo":{
      '::after':{
        'height': '4px',
        'width': '100%',
        'background': 'green'
      }
    }
  }
}

def get_last(obj):
  # get generic last key
  last = list(obj.keys())[-1]

  # check to see if it is psudo
  if last == 'psudo':
    # if it is jump back one
    return list(obj.keys())[-2]
  else:
    # if not return generic last
    return last

def create_css_rule_str(obj):
  # initialize string
  css_rule_str = f''
  last = get_last(obj)
  # loop through all selectors in object
  for prop in obj:
    # double check it is not 'psudo'
    if prop != 'psudo':
      # append rule to string (with correct formatting)
      css_rule_str += f'\t{prop}: {obj[prop]};'
      if prop != last:
        # add return charactor if it is not the last one
        css_rule_str += '\n'
  # return rules
  return css_rule_str

def write_rules(selector, rules, sheet):
  # create string to append
  css_str = selector + '{ \n' + rules + ' \n}; \n\r'

  # append string to file
  sheet.write(css_str)

def createCSS(styles, name):
  # create file
  css = open(f'{name}.css', 'w+')

  # loop through generic styles
  for selector in styles:
    css_rule_str = create_css_rule_str(styles[selector])
    write_rules(selector, css_rule_str, css)

    # loop through nested psudo styles
    if 'psudo' in styles[selector]:
      for psudoselect in styles[selector]["psudo"]:
        css_rule_str = create_css_rule_str(styles[selector]["psudo"][psudoselect])
        write_rules((selector + psudoselect), css_rule_str, css)

  css.close()

createCSS(styles, 'test')