old_contents: #!/usr/bin/env python3
  # -*- coding: utf-8 -*-
  
  import math
  
  def cusip_check(cusip: str) -> bool:
      if len(cusip) != 9:
          raise ValueError('CUSIP must be 9 characters')
  
      cusip = cusip.upper()
      total = 0
      for i in range(8):
          c = cusip[i]
          if c.isdigit():
              v = int(c)
          elif c.isalpha():
              p = ord(c) - ord('A') + 1
              v = p + 9
          elif c == '*':
              v = 36
          elif c == '@':
              v = 37
          elif c == '#':
              v = 38
  
          if i % 2 != 0:
              v *= 2
  
          total += int(v / 10) + v % 10
      check = (10 - (total % 10)) % 10
      return str(check) == cusip[-1]
  
  if __name__ == '__main__':
      codes = [
              '037833100',
              '17275R102',
              '38259P508',
              '594918104',
              '68389X106',
              '68389X105'
              ]
      for code in codes:
          print(f'{code} -> {cusip_check(code)}')
  
new_contents: #!/usr/bin/env python3
  # -*- coding: utf-8 -*-
  
  
  def cusip_check(cusip: str) -> bool:
      if len(cusip) != 9:
          raise ValueError('CUSIP must be 9 characters')
  
      cusip = cusip.upper()
      total = 0
      for i in range(8):
          c = cusip[i]
          if c.isdigit():
              v = int(c)
          elif c.isalpha():
              p = ord(c) - ord('A') + 1
              v = p + 9
          elif c == '*':
              v = 36
          elif c == '@':
              v = 37
          elif c == '#':
              v = 38
  
          if i % 2 != 0:
              v *= 2
  
          total += int(v / 10) + v % 10
      check = (10 - (total % 10)) % 10
      return str(check) == cusip[-1]
  
  
  if __name__ == '__main__':
      codes = [
              '037833100',
              '17275R102',
              '38259P508',
              '594918104',
              '68389X106',
              '68389X105'
              ]
      for code in codes:
          print(f'{code} -> {cusip_check(code)}')
  
subject: Fix styling for cuisp.py