Calculate a Tesla Model 3 VIN, useful to check where they are in te production process

check_model3_vin.py

#!/usr/bin/env python
# coding: utf-8

import sys

# A Tesla Model 3 VIN seems to look like:
#
#       check digit
#         |     
#         |  rank
#         ↓  ↓↓↓↓↓↓
# 5YJ3E1EA8HF000007
#
# Taking https://en.wikibooks.org/wiki/Vehicle_Identification_Numbers_(VIN_codes)/Check_digit in consideration :
#
# VIN      5  Y  J  3  E  1  E  A  x  H  F  a   b   c   d   e   f
# value    5  8  1  3  5  1  5  1  -  8  6  a   b   c   d   e   f
# weight   8  7  6  5  4  3  2  10 -  9  8  7   6   5   4   3   2
# products 40 56 6  15 20 3  10 10 -  72 48 a×7 b×6 c×5 d×4 e×3 f×2
#
# check digit =
# (40+56+6+15+20+3+10+10+72+48+a×7+b×6+c×5+d×4+e×3+f×2) % 11
# 280+a×7+b×6+c×5+d×4+e×3+f×2) % 11
#
# ... if the check digit calculates to 10, then it is replaced by X
#
# Now, take all that and make a beautiful function:

def calculate_model3_vin(rank):
    rank = "{:06d}".format(int(rank))[-6:]
    digit = (280 + int(rank[0])*7 + int(rank[1])*6 + int(rank[2])*5 + \
                   int(rank[3])*4 + int(rank[4])*3 + int(rank[5])*2) % 11
    if digit == 10:
        digit = "X"
    return int(rank), "5YJ3E1EA{}HF{}".format(digit, rank)

if __name__ == "__main__":
    rank, vin = calculate_model3_vin(sys.argv[1])
    print "The VIN for rank {} is {}".format(rank, vin)
    print "You can check if it exists at:"
    print "https://www.nhtsa.gov/recalls?vin={}".format(vin)