主要用于短信或其他資源的ID映射
方法：
def get_format(max_int = 1000000,from_int = 0,min_length = 5):
def f(n):
chars = "abcdefghigklmnopqrstuvwxyz".upper()
b=[]
x = len(chars)
while True:
s=n//x # 商
y=n%x # 余數(shù)
b.append(y)
if s==0:
break
n=s
b.reverse()
re_str = ""
for i in b:
re_str = re_str + (chars[i])
return re_str
while from_int <= max_int:
re_str = f(from_int)
if len(re_str) < min_length:
for i in range(min_length - len(f(from_int)) ):
re_str = re_str + str(int(random.random()*10))
# 增加校驗位
re_str = re_str + (hashlib.md5(re_str.encode(encoding='UTF-8')).hexdigest()[0:1])
yield re_str
from_int = from_int + 1
使用
auto_id = get_format()
auto_id.__next__()
附帶：加密解密方法
def decrypt_format(str_val):
chars = "abcdefghigklmnopqrstuvwxyz".upper()
x = len(chars)
short_str= ""
for i in str_val:
if i in chars:
short_str = short_str + i
# 計算數(shù)量
re_int = 0
y = 0
for c in reversed(short_str):
inx = chars.find(c)
re_int = re_int + math.pow( x, y ) * inx
y = y + 1
return int(re_int)
def encrypt_format(int_n,min_length = 5):
def f(n):
chars = "abcdefghigklmnopqrstuvwxyz".upper()
b=[]
x = len(chars)
while True:
s=n//x # 商
y=n%x # 余數(shù)
b.append(y)
if s==0:
break
n=s
b.reverse()
re_str = ""
for i in b:
re_str = re_str + (chars[i])
return re_str
re_str = f(int_n)
if len(re_str) < min_length:
for i in range(min_length - len(re_str) ):
re_str = re_str + str(int(random.random()*10))
# 增加校驗位
re_str = re_str + (hashlib.md5(re_str.encode(encoding='UTF-8')).hexdigest()[0:1]).lower()
return re_str
執(zhí)行：
print(decrypt_format('BL4028')) #37
print(encrypt_format(decrypt_format('BL4028'))) #BL775f
print(decrypt_format(encrypt_format(decrypt_format('BL4028')))) #37
