Data commit

Task/CUSIP/Python/cusip-1.py

@@ -0,0 +1,42 @@
+#!/usr/bin/env python3
+
+import math
+
+def cusip_check(cusip):
+    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)}')